Performance Analysis of MIMO-OFDM and MISO-OFDM System based on STBC Code (original) (raw)
Related papers
Performance Analysis of MIMO-OFDM System Using QOSTBC Code Structure for M-QAM
ampublisher.com
MIMO-OFDM system has been currently recognized as one of the most competitive technology for 4G mobile wireless systems. MIMO-OFDM system can compensate for the lacks of MIMO systems and give play to the advantages of OFDM system. In this paper, a general Quasi orthogonal space time block code (QOSTBC) structure is proposed for multiple-input multiple-outputorthogonal frequency-division multiplexing (MIMO-OFDM) systems for 8X8 antenna configuration. The signal detection technology used in this paper for MIMO-OFDM system is Zero-Forcing Equalization (linear detection technique). In this paper the analysis of high level of modulations ( i.e M-QAM for different values of M) on MIMO-OFDM system is presented. Here AWGN, Rayleigh and Rician channels have been used for analysis purpose and their effect on BER for high data rates have been presented. The proposed MIMO-OFDM system with QOSTBC using 8X8 antenna configuration has better performance in terms of BER vs SNR than the other systems.
Performance Analysis of MIMO-OFDM System Using QOSTBC Code Structure for M-PSK
Signal Processing: An International …, 2011
MIMO-OFDM system has been currently recognized as one of the most competitive technology for 4G mobile wireless systems. MIMO-OFDM system can compensate for the lacks of MIMO systems and give play to the advantages of OFDM system. In this paper, a general Quasi orthogonal space time block code (QOSTBC) structure is proposed for multiple-input multipleoutput-orthogonal frequency-division multiplexing (MIMO-OFDM) systems for 4X4 antenna configuration. The signal detection technology used in this paper for MIMO-OFDM system is Zero-Forcing Equalization (linear detection technique).
Performance Analysis of STBC-OFDM System Under Multipath Fading Channel
In current 4G systems growing demand of multimedia services and the growth of Internet related contents lead to increasing interest to high speed communications. Recently, space time block codes (STBC) have gained much attention as an effective transmit diversity technique to provide reliable transmission with high peak data rates to increase the capacity of wireless communication systems. In this paper, performance of STBC-OFDM is analyzed under different constraints in Rayleigh fading channels. We have studied the effect of modulation order, antenna selection techniques, slow and fast fading conditions and power conditions on the performance of STBC-OFDM.
Performance Analysis of MIMO-OFDMA Wireless System Using OSTB Cover Rayleigh Fading Channel
2013
This paper presents performance analysis of Multiple-Input Multiple- Output - Orthogonal Frequency Division Multiplexing Access (MIMO-OFDMA) wireless system using orthogonal space time block code (OSTBC) over Rayleigh fading channel. OSTBC is an efficient code system that achieves the maximum of diversity gain in mobile communication systems and it is very useful in reducing the processing complexity of the wireless communication system. Several MIMO-OFDMA OSTBC models based on different number of antenna constellation (2Tx,2Rx) and ( 4Tx,2Rx) have been analyzed. The relationship between Bit Error Rate (BER) and Signal to Noise Ratio (SNR) in Rayleigh fading wireless channel has been studied .The simulation results show the effectiveness and accuracy of the MIMO-OFDMA OSTBC system by decreasing BER for low value of SNR compared with the MIMO-OFDMA system. .
Space Time Block Code Analysis for MIMO-OFDM System
International Journal of Computer Applications, 2014
The growth in high data rate mobile data transmission in recent years is due to the tremendous achievements in Digital Communication especially Digital Modulation Techniques starting from Second Generation system (2G) in early 80's to today 4G (LTE-Advanced). To achieve the goal towards Shannon's Channel Capacity, a no. of modulation techniques are developed during these years. With the tremendous growth in the Very Large Scale Integrated Circuits (VLSI), a no. of digital modulation techniques is easier to implement in convenient manner. Orthogonal Frequency Division Multiplexing (OFDM), one of the latest techniques became feasible and economical due to the high processing speed. OFDM in combination with other techniques like Space Time Block Code (STBC)Phase shift key (PSK) and Quadrature Amplitude Modulation (QAM) give better performances in case of Multi-input Multi-output System (MIMO). This paper presents (STBC) technique for multiple transmission antennae (OFDM) system. Generally in Multiinput Multi-output (MIMO) system code selection across the space and time is difficult to get minimum Bit Error (BER) to achieve maximum output. In adaptive White Gaussian (AWGN) fading channels, STBC is best breakthrough to reduce the BER and obtain maximum output. Like AWGN fading channel the analysis is done for OFDM system using STBC at transmitter end. Various modulation techniques like Binary Phase Shift Key (BPSK) and Quadrature Amplitude Modulation are implemented using mentioned techniques. The Bit Error Rate (BER) versus different Signal to Noise (SNR) ratio are studies for above modulation techniques.
In this paper we have investigated the performance of OFDM-MIMO wireless system. The main objective of this paper is to introduce the basic structure of OFDM and MIMO, including the basic implementation of a MIMO model using OSTBC scheme, the effectiveness of introducing encoders and interleavers in a OFDM-MIMO system, the transmitter and receiver modeling of OFDM, and hence constructing a simple OFDM-MIMO wireless communication system in WLAN and Wi-Fi context with 16-QAM modulation composed of transmitter, channel, receiver, and so on. The system performance is simulated by using the software MATLAB. All the models are being studied for different configurations, that is, for different number of antennas at the transmitter and receiver of the communication system. The results are obtained and compared in terms of Bit Error Rate (BER), Throughput and Bandwidth.
IJSRD, 2013
A general Quasi orthogonal space time block code (QOSTBC) structure is proposed for multiple-input multiple-output-orthogonal frequency division multiplexing (MIMO-OFDM) systems for 8 X 8 antenna configuration. The signal detection technology used in this work for MIMO-OFDM system is Zero-Forcing Equalization (linear detection technique). In this paper, analysis of high level of modulations (i.e. M-QAM and M-PSK for different values of M) on MIMO-OFDM system is presented. In this, AWGN, Rayleigh and Rician channels have been used for analysis purpose and their effect on BER and Spectral Efficiency for high data rates have been presented. The proposed system has better performance than the other systems in terms of SNR improvement of 3-5 dB and spectral efficiency.
Technology Performance Improvement of Qam Based Wireless Communication System Using Ostbc
2015
Wireless communication system is rapidly enhancing using various techniques by many researcher & to meet the requirement of accurate and fast data communication in fading environment. The MIMO technique plays an important role in this direction. It allows upto provide higher order modulation for maintaining the errors in limits. This paper describes one of the MIMO techniques namely orthogonal space time block code. This technique improves the BER of the QAM-16,QAM-32 and QAM-64 based communication in Rayleigh fading environment. The result shows an improvement in the BER.
Performance Evaluation of STBC-OFDM System for Wireless Communication
IERJ, 2015
In this paper the space-time block codes orthogonal frequency division multiplexing system is presented. The performances of the proposed design have been demonstrated through the simulation of an STBC-OFDM system with two transmits antennas and one receive antenna. It provides an accurate but hardware affordable channel estimator to overcome the challenge of multipath fading channels. The system uses Alamouti code with transmit and receive diversity. The implementation of system is done by using MATLAB simulation. The performance of BER for 64 QAM modulation scheme is simulated.
Degrading the Effect of Channel Impairment on STBC-OFDM System in Rayleigh Fading Channel
2016
This paper indicates the space time block code provides transmit diversity in wireless fading channel during the STBC-OFDM system. OFDM is enforced in broadband wireless access systems as the way to beat wireless channel impairments and to enhance and breadth potency. This research is to analyze the performance of non STBC-OFDM system and STBC-OFDM system. The performance has been evaluated for construction modulation (QAM) technique for orthogonal frequency division multiplexing (OFDM) systems using multiple transmit diversity antenna system in the channel. Conjointly the equation of SNR and BER has been derived for 16-QAM for multiple transmit and receive antenna for STBC-OFDM system by considering the have an effect on of Inter-symbol interference (ISI), phase noise and temporal arrangement noise in Raleigh fading channel.