Hà Nguyễn - Academia.edu (original) (raw)
Papers by Hà Nguyễn
There has been increasing application of novel nanomaterials in recent years in various areas, wh... more There has been increasing application of novel nanomaterials in recent years in various areas, which may cause human exposure and environmental pollution. This review aimed to systematically summarize the use of novel nanomaterials in consumer and food products based on their antibacterial properties. The objectives of this work were to: 1) summarize currently available consumer and food products that contain engineered nanoparticles, 2) study mechanisms of the antibacterial property of engineered nanoparticles, 3) review current applications of engineered nanomaterials in Vietnam. The results demonstrate that many nanoparticles are biocompatible and has a potential to be used in agriculture and food science, indicating that more studies are needed to exploit its potential applications. The summative data also show that nanomaterials can be used as an antimicrobial agent to inhibit the growth of pathogens. More effort is required to further elucidate the antimicrobial mechanism and ...
Remote Sensing of Environment, 2020
Proceedings of the 5th International ICST Conference on Collaborative Computing: Networking, Applications, Worksharing, 2009
2012 Fourth International Conference on Communications and Electronics (ICCE), 2012
This paper presents a noncoherent detection scheme for a fixed-gain amplify-and-forward (AF) rela... more This paper presents a noncoherent detection scheme for a fixed-gain amplify-and-forward (AF) relay network, in which the source is equipped with two transmit antennas, while the multiple relays and destination are equipped with a single antenna. An Alamouti space-time block code is employed together with M-ary frequency-shift-keying (FSK). Detection at the destination is performed in two steps. First, the destination estimates the overall channels based on the pilot symbol inherent in FSK transmission. Then it performs the maximal ratio combining (MRC) to make a final decision. An upper bound on the error performance is derived in a closed-form expression and it is shown that the investigated scheme achieves the full diversity order. Simulation results are also presented to confirm the analysis in a temporally-correlated fading environment.
2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications, 2009
Abstract This paper offers a study on Rayleigh channel capacity of opportunistic cooperative netw... more Abstract This paper offers a study on Rayleigh channel capacity of opportunistic cooperative networks in conjunction with adaptive transmission where the source adapts its rate and/or power level according to the changing channel conditions while the best relay simply amplifies and forwards the signals. To this end, the upper and lower bound of the end-to-end effective signal-to-noise ratio (SNR) for an arbitrary number of cooperative relays equipped amplify-and-forward protocol is derived and then used to derive the closed-form ...
IET Communications, 2014
This paper studies dual-hop amplify-and-forward relaying system employing differential encoding a... more This paper studies dual-hop amplify-and-forward relaying system employing differential encoding and decoding over time-varying Rayleigh fading channels. First, the convectional "two-symbol" differential detection (CDD) is theoretically analysed in terms of the bit-error-rate (BER). The obtained analysis clearly shows that performance of two-symbol differential detection severely degrades in fast-fading channels and reaches an irreducible error floor at high signal-to-noise ratio region. To overcome the error floor experienced with fast-fading, a practical suboptimal "multiple-symbol" detection (MSD) is designed and its performance is theoretically analysed. The analysis of CDD and MSD are verified and illustrated with simulation results under different fading scenarios. Specifically, the obtained results show that the proposed MSD can significantly improve the system performance in fast-fading channels.
2007 Canadian Conference on Electrical and Computer Engineering, 2007
Abstract A bandwidth-efficient joint network-channel coding scheme based on distributed turbo cod... more Abstract A bandwidth-efficient joint network-channel coding scheme based on distributed turbo codes is proposed for relay-based wireless communications systems. The proposed scheme provides a solution to increase the transmission rate and/or improve the error ...
IEEE Vehicular Technology Conference, 2006
Page 1. A Bandwidth-Efficient Coded Cooperative Communications System Hieu T. Nguyen and Ha H. Ng... more Page 1. A Bandwidth-Efficient Coded Cooperative Communications System Hieu T. Nguyen and Ha H. Nguyen Department of Electrical & Computer Engineering University of Saskatchewan, Saskatoon, Canada trn503@mail.usask.ca, ha.nguyen@usask.ca ...
Software: Practice and Experience, 2013
Journal of Location Based Services, 2011
Full terms and conditions of use: http://www.informaworld.com/terms-and-conditions-of-access.pdf ... more Full terms and conditions of use: http://www.informaworld.com/terms-and-conditions-of-access.pdf This article may be used for research, teaching and private study purposes. Any substantial or systematic reproduction, redistribution , reselling , loan or sub-licensing, systematic supply or distribution in any form to anyone is expressly forbidden. The publisher does not give any warranty express or implied or make any representation that the contents will be complete or accurate or up to date. The accuracy of any instructions, formulae and drug doses should be independently verified with primary sources. The publisher shall not be liable for any loss, actions, claims, proceedings, demand or costs or damages whatsoever or howsoever caused arising directly or indirectly in connection with or arising out of the use of this material.
IEEE Transactions on Communications, 2000
There has been increasing application of novel nanomaterials in recent years in various areas, wh... more There has been increasing application of novel nanomaterials in recent years in various areas, which may cause human exposure and environmental pollution. This review aimed to systematically summarize the use of novel nanomaterials in consumer and food products based on their antibacterial properties. The objectives of this work were to: 1) summarize currently available consumer and food products that contain engineered nanoparticles, 2) study mechanisms of the antibacterial property of engineered nanoparticles, 3) review current applications of engineered nanomaterials in Vietnam. The results demonstrate that many nanoparticles are biocompatible and has a potential to be used in agriculture and food science, indicating that more studies are needed to exploit its potential applications. The summative data also show that nanomaterials can be used as an antimicrobial agent to inhibit the growth of pathogens. More effort is required to further elucidate the antimicrobial mechanism and ...
Remote Sensing of Environment, 2020
Proceedings of the 5th International ICST Conference on Collaborative Computing: Networking, Applications, Worksharing, 2009
2012 Fourth International Conference on Communications and Electronics (ICCE), 2012
This paper presents a noncoherent detection scheme for a fixed-gain amplify-and-forward (AF) rela... more This paper presents a noncoherent detection scheme for a fixed-gain amplify-and-forward (AF) relay network, in which the source is equipped with two transmit antennas, while the multiple relays and destination are equipped with a single antenna. An Alamouti space-time block code is employed together with M-ary frequency-shift-keying (FSK). Detection at the destination is performed in two steps. First, the destination estimates the overall channels based on the pilot symbol inherent in FSK transmission. Then it performs the maximal ratio combining (MRC) to make a final decision. An upper bound on the error performance is derived in a closed-form expression and it is shown that the investigated scheme achieves the full diversity order. Simulation results are also presented to confirm the analysis in a temporally-correlated fading environment.
2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications, 2009
Abstract This paper offers a study on Rayleigh channel capacity of opportunistic cooperative netw... more Abstract This paper offers a study on Rayleigh channel capacity of opportunistic cooperative networks in conjunction with adaptive transmission where the source adapts its rate and/or power level according to the changing channel conditions while the best relay simply amplifies and forwards the signals. To this end, the upper and lower bound of the end-to-end effective signal-to-noise ratio (SNR) for an arbitrary number of cooperative relays equipped amplify-and-forward protocol is derived and then used to derive the closed-form ...
IET Communications, 2014
This paper studies dual-hop amplify-and-forward relaying system employing differential encoding a... more This paper studies dual-hop amplify-and-forward relaying system employing differential encoding and decoding over time-varying Rayleigh fading channels. First, the convectional "two-symbol" differential detection (CDD) is theoretically analysed in terms of the bit-error-rate (BER). The obtained analysis clearly shows that performance of two-symbol differential detection severely degrades in fast-fading channels and reaches an irreducible error floor at high signal-to-noise ratio region. To overcome the error floor experienced with fast-fading, a practical suboptimal "multiple-symbol" detection (MSD) is designed and its performance is theoretically analysed. The analysis of CDD and MSD are verified and illustrated with simulation results under different fading scenarios. Specifically, the obtained results show that the proposed MSD can significantly improve the system performance in fast-fading channels.
2007 Canadian Conference on Electrical and Computer Engineering, 2007
Abstract A bandwidth-efficient joint network-channel coding scheme based on distributed turbo cod... more Abstract A bandwidth-efficient joint network-channel coding scheme based on distributed turbo codes is proposed for relay-based wireless communications systems. The proposed scheme provides a solution to increase the transmission rate and/or improve the error ...
IEEE Vehicular Technology Conference, 2006
Page 1. A Bandwidth-Efficient Coded Cooperative Communications System Hieu T. Nguyen and Ha H. Ng... more Page 1. A Bandwidth-Efficient Coded Cooperative Communications System Hieu T. Nguyen and Ha H. Nguyen Department of Electrical & Computer Engineering University of Saskatchewan, Saskatoon, Canada trn503@mail.usask.ca, ha.nguyen@usask.ca ...
Software: Practice and Experience, 2013
Journal of Location Based Services, 2011
Full terms and conditions of use: http://www.informaworld.com/terms-and-conditions-of-access.pdf ... more Full terms and conditions of use: http://www.informaworld.com/terms-and-conditions-of-access.pdf This article may be used for research, teaching and private study purposes. Any substantial or systematic reproduction, redistribution , reselling , loan or sub-licensing, systematic supply or distribution in any form to anyone is expressly forbidden. The publisher does not give any warranty express or implied or make any representation that the contents will be complete or accurate or up to date. The accuracy of any instructions, formulae and drug doses should be independently verified with primary sources. The publisher shall not be liable for any loss, actions, claims, proceedings, demand or costs or damages whatsoever or howsoever caused arising directly or indirectly in connection with or arising out of the use of this material.
IEEE Transactions on Communications, 2000