LAWAL BELLO - Academia.edu (original) (raw)
Papers by LAWAL BELLO
2017 Progress In Electromagnetics Research Symposium - Spring (PIERS), 2017
In this paper, a new technique is proposed for conserving power in mobile ad hoc wireless network... more In this paper, a new technique is proposed for conserving power in mobile ad hoc wireless network. The technique is based on the existing on-demand ad hoc routing protocols with the addition of power model. The unique feature of the technique is that mobile nodes will be able to evaluate their power status to decide if they are fit for packet forwarding and reception. This is illustrated using computational approach supported by computer simulations over mobile ad hoc wireless network containing 18 mobile nodes. The proposed technique is incorporated into the Ad Hoc On demand Distance Vector (AODV) and Dynamic Source Routing (DSR) protocols. The results showed that using power saving technique reduces power consumption to more than 15% rate at which mobile nodes achieved with no much delay in the network as compared to the conventional network configured with AODV and DSR routing protocols.
Progress In Electromagnetics Research B, 2012
In this paper, mathematical analysis supported by computer simulation is used to study cellular s... more In this paper, mathematical analysis supported by computer simulation is used to study cellular system information capacity change due to propagation loss and system parameters (such as path loss exponent, shadowing and antenna height) at microwave carrier frequencies greater than 2 GHz and smaller cell size radius. An improved co-channel interference model, which includes the second tier co-channel interfering cells is used for the analysis. The system performance is measured in terms of the uplink information capacity of a time-division multiple access (TDMA) based cellular wireless system. The analysis and simulation results show that the second tier cochannel interfering cells become active at higher microwave carrier frequencies and smaller cell size radius. The results show that for both distance-dependent: path loss, shadowing and effective road height the uplink information capacity of the cellular wireless system decreases as carrier frequency f c increases and cell size radius R decreases. For example at a carrier frequency f c = 15.75 GHz, basic path loss exponent α = 2 and cell size radius R = 100, 500 and 1000 m the decrease in information capacity was 20, 5.29 and 2.68%.
IET Networks, 2014
A technique is developed for ad hoc on-demand routing protocol. The protocol is based on the conv... more A technique is developed for ad hoc on-demand routing protocol. The protocol is based on the conventional ondemand ad hoc routing protocols with the addition of power model. The algorithm design and development is aimed to incorporate the transmitted power consumption function in such a manner that mobile nodes are able to evaluate their power status to decide if they are fit for packet forwarding and reception. This is illustrated through analytical approach supported by computer simulations over mobile ad hoc wireless network containing 80 mobile nodes. The results showed that power savings of 50% were achieved with no delay in the network and increased throughput performance by 60%, as compared to a network with conventional ad hoc on-demand distance vector and dynamic source routing protocols.
3rd IEEE International Conference on Adaptive Science and Technology (ICAST 2011), 2011
Abstract In this paper, we describe a simulation performance of Vehicular Ad hoc network on diffe... more Abstract In this paper, we describe a simulation performance of Vehicular Ad hoc network on different traffic models in a dynamic changing environment. The simulation results showed that as delay and jitter increases, the throughput of receiving bits decreases, the nodes ...
2011 UKSim 5th European Symposium on Computer Modeling and Simulation, 2011
Page 1. Impact of Vehicular Traffic on Information Capacity of Cellular Wireless Network At Carri... more Page 1. Impact of Vehicular Traffic on Information Capacity of Cellular Wireless Network At Carrier Frequencies Greater Than 3 GHz Kwashie A. Anang, Predrag B. Rpajic, Titus. I. Eneh, Lawal Bello and Grace Oletu Department ...
2012 IEEE 14th International Conference on Communication Technology, 2012
ABSTRACT This paper, uses computer simulation to study the impact of wireless channel on the perf... more ABSTRACT This paper, uses computer simulation to study the impact of wireless channel on the performance of Dynamic Source Routing (DSR) protocol for multi-hop wireless ad hoc networks of mobile nodes at higher microwave carrier frequencies greater than 2 GHz. Simulation results shows that as the path loss exponent of the propagation model increases the received signal power at individual mobile nodes also increases. The path loss exponent had no effect on the end-to-end throughput of the DSR protocol for multi-hop wireless ad hoc networks.
2011 UkSim 13th International Conference on Computer Modelling and Simulation, 2011
AbstractA technique is proposed to evaluate the effect of ambient noise and path loss have on re... more AbstractA technique is proposed to evaluate the effect of ambient noise and path loss have on received signal strength of mobile node in a mobile ad hoc network environment using optimized network (OPNET) simulator while comparing the performance of Ad-Hoc on demand ...
2011 IEEE 73rd Vehicular Technology Conference (VTC Spring), 2011
... Titus Eneh 1, Predrag B. Rpajic, Senior Member, IEEE 2, Kwashie Anang 3 and Lawal Bello 4 Dep... more ... Titus Eneh 1, Predrag B. Rpajic, Senior Member, IEEE 2, Kwashie Anang 3 and Lawal Bello 4 Department of Wireless and Mobile Communication Engineering, School of Engineering the University of Greenwich, Chatham ... (26) is the well known shannon capacity formula with ...
Advanced Materials Research, 2011
In this paper, we optimized the performance of Ad hoc on Demand Vector (AODV) and Dynamic Source ... more In this paper, we optimized the performance of Ad hoc on Demand Vector (AODV) and Dynamic Source Routing (DSR) protocols through simulation. Numerical and simulation results presented illustrate how the performance of an ad hoc network protocol drastically changes as a result of changing the mobility model and ambient noise level in the network. The simulation results showed that, in the presence of ambient noise level in the network, AODV and DSR protocols have a significant improvement in end-to-end delay reduction with 68.5 % for AODV and 86.8% for DSR respectively. The network load simulation result revealed that DSR protocol maintains a constant routing load while the AODV protocol shows a 75% drop in routing load.
2011 IEEE 73rd Vehicular Technology Conference (VTC Spring), 2011
An information capacity-cost analysis is used to find a minimum cell size for information capacit... more An information capacity-cost analysis is used to find a minimum cell size for information capacity increase in cellular wireless network, thus a theoretical limit to cell size reduction. The results show that as the cell size radius R reduces to 300 m and less, the proposed interference model show a 5.76-18.89 % decrease in the information capacity per unit cost (£, $, etc) at microwave carrier frequencies f c > 3.35 GHz. This result illustrates that there is a theoretical limit to cell size reduction in relation to information capacity performance and cost. An inductive approach is used to generate a formula for calculating the number of co-channel interfering cells N n in a cellular wireless site layout. Such a formula allows one to calculate the number of co-channel interfering cells in subsequent tiers of a cellular wireless site layout. The geometric derivation shows that the number of co-channel interfering cell N n in a subsequent tier is the product of the number of co-channel interfering cells in the first tier N I and the tier number n. Thus, the number of co-channel interfering cell in a subsequent tier N n = N I × n. This formula enables subsequent tier co-channel interference to be included in the information capacity analysis of future and emerging, and finding the minimum cell size for information capacity increase in a cellular wireless communication system.
Progress In Electromagnetics Research B, 2012
In this paper, mathematical analysis supported by computer simulation is used to investigate the ... more In this paper, mathematical analysis supported by computer simulation is used to investigate the impact of both system and propagation loss parameters on the performance of cellular wireless network operating at microwave carrier frequencies greater than 2 GHz, where multiple tier of co-channel interfering cells are considered to be active. The two-slope path loss model and the uplink information capacity of the cellular network is used for the performance analysis. Results show that for carrier frequencies greater than 2 GHz and smaller cell radius multiple tier of co-channel interfering cells become active as compared to carrier frequencies lesser than 2 GHz. The multiple tier of co-channel interfering cells, leads to a decrease in the information capacity of the cellular wireless network. The results also show that the system performance is sensitive to most of the propagation model parameters such as the basic and extra path loss exponent.
2011 3rd International Conference on Computer Research and Development, 2011
Page 1. Sensitivity of Information Capacity of Land Mobile Cellular System to the Base Station An... more Page 1. Sensitivity of Information Capacity of Land Mobile Cellular System to the Base Station Antenna Height at Higher Microwave Frequencies Kwashie A. Anang, Predrag B. Rapajic, Titus. I. Eneh and G. Oletu Department ...
2011 Future of Instrumentation International Workshop (FIIW) Proceedings, 2011
ABSTRACT In this paper, we describe a simulation study of the impact of topology control and traf... more ABSTRACT In this paper, we describe a simulation study of the impact of topology control and traffic models on the performance of Mobile Ad Hoc Wireless Network routing protocol in a dynamic changing environment. Simulation results shows that Constant Bit Rate (CBR) outperformed Transmission Control Protocol (TCP) in all metrics chosen, except for TCP which was able to handle packet delivery in large topologies than CBR, but at the cost of increase in overall delay in the network. From the simulation results it is concluded that, the increase in spurious packet drops in TCP is due to its slow start which invoke its congestion control algorithm.
2012 UKSim 14th International Conference on Computer Modelling and Simulation, 2012
In this paper, we describe a computer simulation study of the sensitivity of Dynamic Source Routi... more In this paper, we describe a computer simulation study of the sensitivity of Dynamic Source Routing (DSR) protocol performance to wireless channel at microwave carrier frequencies greater than 2 GHz. Performance simulation results show that at microwave carrier frequencies greater than 2 GHz, the break point distance effect the performance of the Dynamic Source Routing Protocol in Mobile Wireless Ad
2011 IEEE 13th International Conference on Communication Technology, 2011
Page 1. The Performance of Dynamic Source Routing Protocol to Path Loss Models At Carrier Frequen... more Page 1. The Performance of Dynamic Source Routing Protocol to Path Loss Models At Carrier Frequencies Above 2 GHz Kwashie A. Anang, Lawal Bello, Titus. I. Eneh, Panos Bakalis and Predrag B. Rpajic Department of Wireless ...
2012 IEEE 4th International Conference on Adaptive Science & Technology (ICAST), 2012
ABSTRACT In this paper, mathematical analysis supported by computer simulation are used to study ... more ABSTRACT In this paper, mathematical analysis supported by computer simulation are used to study the impact of vehicular traffic on the performance of cellular wireless network operating at carrier frequencies greater than 2 GHz. The performance analysis is founded on the uplink information capacity of a cellular wireless system where co-channel interference are from multiple tiers. Results show that for both light and heavy vehicular traffic environment, at higher carrier frequencies and smaller cell size, other tiers of co-channel interfering cells become active. The results also that for heavy vehicular traffic the decrease in information capacity was lesser as compare to light vehicular traffic.
3rd IEEE International Conference on Adaptive Science and Technology (ICAST 2011), 2011
In this paper, the mathematical analysis supported by computer simulation is used to find the inf... more In this paper, the mathematical analysis supported by computer simulation is used to find the information capacity of adaptive MIMO OFDM in digital communication systems. Result shows that in additive white Gaussian noise (AWGN) channel, the capacity performance of Least mean square (LMS) is poor while the recursive least square (RLS) shows an increase in capacity as the SNR increases. The joint channel parameters estimation in adaptive MIMO OFDM shows a 2dB SNR gain at BER of 10 −5 when compared to individual parameter estimation.
2013 European Modelling Symposium, 2013
The central challenge in the design of ad-hoc wireless networks is the development of a dynamic r... more The central challenge in the design of ad-hoc wireless networks is the development of a dynamic routing protocol that efficiently finds routes between mobile nodes. Several network routing protocols such as Dynamic Source Routing (DSR), Ad Hoc On-demand Distance Vector (AODV) and Destination Sequence Distance Vector (DSDV) have been proposed to facilitate communication in a dynamically changing network area. Mobile Ad hoc Network (MANET) is faced with various challenges such as resource consumption during network routing operation. This paper present results from detailed power measurement studies of MANETs with emphasis on power consumption with different antenna designs. Computational simulation is used to analyse the power consumption in MANET on two platforms i.e network configured with directional and omnidirectional antenna. The simulation results show that networks configured with directional antennas save 68% of the power as compared to networks configured with omni-directional antennas. While 99% packet delivery ratio were achieved with networks configured with directional antenna as compared to network with omnidirectional antenna.
Advanced Materials Research, 2011
The combination of MIMO signal processing with OFDM is a solution to achieving high data rates fo... more The combination of MIMO signal processing with OFDM is a solution to achieving high data rates for next generation wireless communication systems operating in frequency selective fading environments. To realize the extension of the MIMO with OFDM, a number of changes are required in the baseband signal processing. The developed adaptive Multiuser Detection in MIMO OFDM(AMUD) scheme performs better compared to non adaptive MIMO OFDM, at low Signal to noise ratio (SNR), it shows good performance in computational complexity, bit error rate (BER) and capacity. Simulation results show that the developed algorithm sum rate capacity is very close to MIMO theoretical upper bound (21.5 bits/s/Hz at signal to noise ratio of 20dB) which strongly indicate it’s applicability to the uplink channel where power transmission at the mobile station is a constraint. The BER performance of the developed scheme shows that, as the number of antenna increases, the 8 x 8 AMUD provides a 2dB gain compared to...
Journal of Communications, 2011
In this paper, an Adaptive Receiver Power Routing (ARPR) protocol technique for Mobile Ad Hoc wir... more In this paper, an Adaptive Receiver Power Routing (ARPR) protocol technique for Mobile Ad Hoc wireless network is proposed. The adaptive receiver power routing (ARPR) protocol evaluates the effect of environment, and signal path loss on a mobile ad hoc wireless network quality of service (QoS) and throughput performance. The proposed technique is incorporated into Dynamic Source Routing (DSR) protocol. Mathematical analysis supported by computer simulations is used to validate the scalability of the proposed technique. The simulation results showed that when ARPR is incorporated into DSR the throughput performance increased by 62.5 %, compared to the conventional DSR protocol model, without ARPR. The simulation result also showed that the average received power for individual nodes was 1.0 × 10 −10 watt for the proposed ARPR model and 5.0 × 10 −2 watt for conventional model.
2017 Progress In Electromagnetics Research Symposium - Spring (PIERS), 2017
In this paper, a new technique is proposed for conserving power in mobile ad hoc wireless network... more In this paper, a new technique is proposed for conserving power in mobile ad hoc wireless network. The technique is based on the existing on-demand ad hoc routing protocols with the addition of power model. The unique feature of the technique is that mobile nodes will be able to evaluate their power status to decide if they are fit for packet forwarding and reception. This is illustrated using computational approach supported by computer simulations over mobile ad hoc wireless network containing 18 mobile nodes. The proposed technique is incorporated into the Ad Hoc On demand Distance Vector (AODV) and Dynamic Source Routing (DSR) protocols. The results showed that using power saving technique reduces power consumption to more than 15% rate at which mobile nodes achieved with no much delay in the network as compared to the conventional network configured with AODV and DSR routing protocols.
Progress In Electromagnetics Research B, 2012
In this paper, mathematical analysis supported by computer simulation is used to study cellular s... more In this paper, mathematical analysis supported by computer simulation is used to study cellular system information capacity change due to propagation loss and system parameters (such as path loss exponent, shadowing and antenna height) at microwave carrier frequencies greater than 2 GHz and smaller cell size radius. An improved co-channel interference model, which includes the second tier co-channel interfering cells is used for the analysis. The system performance is measured in terms of the uplink information capacity of a time-division multiple access (TDMA) based cellular wireless system. The analysis and simulation results show that the second tier cochannel interfering cells become active at higher microwave carrier frequencies and smaller cell size radius. The results show that for both distance-dependent: path loss, shadowing and effective road height the uplink information capacity of the cellular wireless system decreases as carrier frequency f c increases and cell size radius R decreases. For example at a carrier frequency f c = 15.75 GHz, basic path loss exponent α = 2 and cell size radius R = 100, 500 and 1000 m the decrease in information capacity was 20, 5.29 and 2.68%.
IET Networks, 2014
A technique is developed for ad hoc on-demand routing protocol. The protocol is based on the conv... more A technique is developed for ad hoc on-demand routing protocol. The protocol is based on the conventional ondemand ad hoc routing protocols with the addition of power model. The algorithm design and development is aimed to incorporate the transmitted power consumption function in such a manner that mobile nodes are able to evaluate their power status to decide if they are fit for packet forwarding and reception. This is illustrated through analytical approach supported by computer simulations over mobile ad hoc wireless network containing 80 mobile nodes. The results showed that power savings of 50% were achieved with no delay in the network and increased throughput performance by 60%, as compared to a network with conventional ad hoc on-demand distance vector and dynamic source routing protocols.
3rd IEEE International Conference on Adaptive Science and Technology (ICAST 2011), 2011
Abstract In this paper, we describe a simulation performance of Vehicular Ad hoc network on diffe... more Abstract In this paper, we describe a simulation performance of Vehicular Ad hoc network on different traffic models in a dynamic changing environment. The simulation results showed that as delay and jitter increases, the throughput of receiving bits decreases, the nodes ...
2011 UKSim 5th European Symposium on Computer Modeling and Simulation, 2011
Page 1. Impact of Vehicular Traffic on Information Capacity of Cellular Wireless Network At Carri... more Page 1. Impact of Vehicular Traffic on Information Capacity of Cellular Wireless Network At Carrier Frequencies Greater Than 3 GHz Kwashie A. Anang, Predrag B. Rpajic, Titus. I. Eneh, Lawal Bello and Grace Oletu Department ...
2012 IEEE 14th International Conference on Communication Technology, 2012
ABSTRACT This paper, uses computer simulation to study the impact of wireless channel on the perf... more ABSTRACT This paper, uses computer simulation to study the impact of wireless channel on the performance of Dynamic Source Routing (DSR) protocol for multi-hop wireless ad hoc networks of mobile nodes at higher microwave carrier frequencies greater than 2 GHz. Simulation results shows that as the path loss exponent of the propagation model increases the received signal power at individual mobile nodes also increases. The path loss exponent had no effect on the end-to-end throughput of the DSR protocol for multi-hop wireless ad hoc networks.
2011 UkSim 13th International Conference on Computer Modelling and Simulation, 2011
AbstractA technique is proposed to evaluate the effect of ambient noise and path loss have on re... more AbstractA technique is proposed to evaluate the effect of ambient noise and path loss have on received signal strength of mobile node in a mobile ad hoc network environment using optimized network (OPNET) simulator while comparing the performance of Ad-Hoc on demand ...
2011 IEEE 73rd Vehicular Technology Conference (VTC Spring), 2011
... Titus Eneh 1, Predrag B. Rpajic, Senior Member, IEEE 2, Kwashie Anang 3 and Lawal Bello 4 Dep... more ... Titus Eneh 1, Predrag B. Rpajic, Senior Member, IEEE 2, Kwashie Anang 3 and Lawal Bello 4 Department of Wireless and Mobile Communication Engineering, School of Engineering the University of Greenwich, Chatham ... (26) is the well known shannon capacity formula with ...
Advanced Materials Research, 2011
In this paper, we optimized the performance of Ad hoc on Demand Vector (AODV) and Dynamic Source ... more In this paper, we optimized the performance of Ad hoc on Demand Vector (AODV) and Dynamic Source Routing (DSR) protocols through simulation. Numerical and simulation results presented illustrate how the performance of an ad hoc network protocol drastically changes as a result of changing the mobility model and ambient noise level in the network. The simulation results showed that, in the presence of ambient noise level in the network, AODV and DSR protocols have a significant improvement in end-to-end delay reduction with 68.5 % for AODV and 86.8% for DSR respectively. The network load simulation result revealed that DSR protocol maintains a constant routing load while the AODV protocol shows a 75% drop in routing load.
2011 IEEE 73rd Vehicular Technology Conference (VTC Spring), 2011
An information capacity-cost analysis is used to find a minimum cell size for information capacit... more An information capacity-cost analysis is used to find a minimum cell size for information capacity increase in cellular wireless network, thus a theoretical limit to cell size reduction. The results show that as the cell size radius R reduces to 300 m and less, the proposed interference model show a 5.76-18.89 % decrease in the information capacity per unit cost (£, $, etc) at microwave carrier frequencies f c > 3.35 GHz. This result illustrates that there is a theoretical limit to cell size reduction in relation to information capacity performance and cost. An inductive approach is used to generate a formula for calculating the number of co-channel interfering cells N n in a cellular wireless site layout. Such a formula allows one to calculate the number of co-channel interfering cells in subsequent tiers of a cellular wireless site layout. The geometric derivation shows that the number of co-channel interfering cell N n in a subsequent tier is the product of the number of co-channel interfering cells in the first tier N I and the tier number n. Thus, the number of co-channel interfering cell in a subsequent tier N n = N I × n. This formula enables subsequent tier co-channel interference to be included in the information capacity analysis of future and emerging, and finding the minimum cell size for information capacity increase in a cellular wireless communication system.
Progress In Electromagnetics Research B, 2012
In this paper, mathematical analysis supported by computer simulation is used to investigate the ... more In this paper, mathematical analysis supported by computer simulation is used to investigate the impact of both system and propagation loss parameters on the performance of cellular wireless network operating at microwave carrier frequencies greater than 2 GHz, where multiple tier of co-channel interfering cells are considered to be active. The two-slope path loss model and the uplink information capacity of the cellular network is used for the performance analysis. Results show that for carrier frequencies greater than 2 GHz and smaller cell radius multiple tier of co-channel interfering cells become active as compared to carrier frequencies lesser than 2 GHz. The multiple tier of co-channel interfering cells, leads to a decrease in the information capacity of the cellular wireless network. The results also show that the system performance is sensitive to most of the propagation model parameters such as the basic and extra path loss exponent.
2011 3rd International Conference on Computer Research and Development, 2011
Page 1. Sensitivity of Information Capacity of Land Mobile Cellular System to the Base Station An... more Page 1. Sensitivity of Information Capacity of Land Mobile Cellular System to the Base Station Antenna Height at Higher Microwave Frequencies Kwashie A. Anang, Predrag B. Rapajic, Titus. I. Eneh and G. Oletu Department ...
2011 Future of Instrumentation International Workshop (FIIW) Proceedings, 2011
ABSTRACT In this paper, we describe a simulation study of the impact of topology control and traf... more ABSTRACT In this paper, we describe a simulation study of the impact of topology control and traffic models on the performance of Mobile Ad Hoc Wireless Network routing protocol in a dynamic changing environment. Simulation results shows that Constant Bit Rate (CBR) outperformed Transmission Control Protocol (TCP) in all metrics chosen, except for TCP which was able to handle packet delivery in large topologies than CBR, but at the cost of increase in overall delay in the network. From the simulation results it is concluded that, the increase in spurious packet drops in TCP is due to its slow start which invoke its congestion control algorithm.
2012 UKSim 14th International Conference on Computer Modelling and Simulation, 2012
In this paper, we describe a computer simulation study of the sensitivity of Dynamic Source Routi... more In this paper, we describe a computer simulation study of the sensitivity of Dynamic Source Routing (DSR) protocol performance to wireless channel at microwave carrier frequencies greater than 2 GHz. Performance simulation results show that at microwave carrier frequencies greater than 2 GHz, the break point distance effect the performance of the Dynamic Source Routing Protocol in Mobile Wireless Ad
2011 IEEE 13th International Conference on Communication Technology, 2011
Page 1. The Performance of Dynamic Source Routing Protocol to Path Loss Models At Carrier Frequen... more Page 1. The Performance of Dynamic Source Routing Protocol to Path Loss Models At Carrier Frequencies Above 2 GHz Kwashie A. Anang, Lawal Bello, Titus. I. Eneh, Panos Bakalis and Predrag B. Rpajic Department of Wireless ...
2012 IEEE 4th International Conference on Adaptive Science & Technology (ICAST), 2012
ABSTRACT In this paper, mathematical analysis supported by computer simulation are used to study ... more ABSTRACT In this paper, mathematical analysis supported by computer simulation are used to study the impact of vehicular traffic on the performance of cellular wireless network operating at carrier frequencies greater than 2 GHz. The performance analysis is founded on the uplink information capacity of a cellular wireless system where co-channel interference are from multiple tiers. Results show that for both light and heavy vehicular traffic environment, at higher carrier frequencies and smaller cell size, other tiers of co-channel interfering cells become active. The results also that for heavy vehicular traffic the decrease in information capacity was lesser as compare to light vehicular traffic.
3rd IEEE International Conference on Adaptive Science and Technology (ICAST 2011), 2011
In this paper, the mathematical analysis supported by computer simulation is used to find the inf... more In this paper, the mathematical analysis supported by computer simulation is used to find the information capacity of adaptive MIMO OFDM in digital communication systems. Result shows that in additive white Gaussian noise (AWGN) channel, the capacity performance of Least mean square (LMS) is poor while the recursive least square (RLS) shows an increase in capacity as the SNR increases. The joint channel parameters estimation in adaptive MIMO OFDM shows a 2dB SNR gain at BER of 10 −5 when compared to individual parameter estimation.
2013 European Modelling Symposium, 2013
The central challenge in the design of ad-hoc wireless networks is the development of a dynamic r... more The central challenge in the design of ad-hoc wireless networks is the development of a dynamic routing protocol that efficiently finds routes between mobile nodes. Several network routing protocols such as Dynamic Source Routing (DSR), Ad Hoc On-demand Distance Vector (AODV) and Destination Sequence Distance Vector (DSDV) have been proposed to facilitate communication in a dynamically changing network area. Mobile Ad hoc Network (MANET) is faced with various challenges such as resource consumption during network routing operation. This paper present results from detailed power measurement studies of MANETs with emphasis on power consumption with different antenna designs. Computational simulation is used to analyse the power consumption in MANET on two platforms i.e network configured with directional and omnidirectional antenna. The simulation results show that networks configured with directional antennas save 68% of the power as compared to networks configured with omni-directional antennas. While 99% packet delivery ratio were achieved with networks configured with directional antenna as compared to network with omnidirectional antenna.
Advanced Materials Research, 2011
The combination of MIMO signal processing with OFDM is a solution to achieving high data rates fo... more The combination of MIMO signal processing with OFDM is a solution to achieving high data rates for next generation wireless communication systems operating in frequency selective fading environments. To realize the extension of the MIMO with OFDM, a number of changes are required in the baseband signal processing. The developed adaptive Multiuser Detection in MIMO OFDM(AMUD) scheme performs better compared to non adaptive MIMO OFDM, at low Signal to noise ratio (SNR), it shows good performance in computational complexity, bit error rate (BER) and capacity. Simulation results show that the developed algorithm sum rate capacity is very close to MIMO theoretical upper bound (21.5 bits/s/Hz at signal to noise ratio of 20dB) which strongly indicate it’s applicability to the uplink channel where power transmission at the mobile station is a constraint. The BER performance of the developed scheme shows that, as the number of antenna increases, the 8 x 8 AMUD provides a 2dB gain compared to...
Journal of Communications, 2011
In this paper, an Adaptive Receiver Power Routing (ARPR) protocol technique for Mobile Ad Hoc wir... more In this paper, an Adaptive Receiver Power Routing (ARPR) protocol technique for Mobile Ad Hoc wireless network is proposed. The adaptive receiver power routing (ARPR) protocol evaluates the effect of environment, and signal path loss on a mobile ad hoc wireless network quality of service (QoS) and throughput performance. The proposed technique is incorporated into Dynamic Source Routing (DSR) protocol. Mathematical analysis supported by computer simulations is used to validate the scalability of the proposed technique. The simulation results showed that when ARPR is incorporated into DSR the throughput performance increased by 62.5 %, compared to the conventional DSR protocol model, without ARPR. The simulation result also showed that the average received power for individual nodes was 1.0 × 10 −10 watt for the proposed ARPR model and 5.0 × 10 −2 watt for conventional model.