The Error Performance Of Constant Envelope OFDM With Channel Prediction And Joint Transmit And Receive Diversity In Cooperative Communication Systems

Constant envelope orthogonal frequency division multiplexing(CE-OFDM)system has been widely utilized in various communication systems,such as optical fiber communication,civil radio,underwater acoustic communication and 5G millimeter wave communication because of the advantages of high transmission rate and good anti-multipath interference performance.The transmit antenna selection(TAS)/receiving antenna maximal ratio combining(MRC)diversity with ideal channel state information(CSI)can effectively restrain the effect of fading channel on symbol error performance of CE-OFDM system.However,the ideal CSI is difficult to be obtained due to the impact of feedback delay and other factors.In this thesis,the pilot assisted modulation(PSAM)and minimum mean square error(MMSE)Wiener channel prediction with transmit antenna selection(TASP)/MRC diversity technique are applied to CE-OFDM system,the lower bound expressions for the symbol error rate of the above CE-OFDM system with M-ary phase shift keying(MPSK)and rectangular M-ary quadrature amplitude modulation(MQAM)were investigated.The amplify-and-forward(AF)protocol is commonly used in cooperative communication systems because of its simple implementation and low hardware cost.However,when the channel feedback delay has a serious impact on AF cooperative systems with combined TAS/MRC diversity or relay selection,the symbol error performance of these systems will deteriorate.This thesis intends to investigate the symbol error performance of variable gain AF cooperative system using CE-OFDM and combined feedback delay transmit antenna selection(TASD)/MRC diversity under MPSK and rectangular MQAM modulation over fading channel,and the symbol error performance of AF cooperative system with relay selection using CE-OFDM with rectangular MQAM modulation and MMSE Wiener channel prediction under fixed gain or variable gain AF protocols over fading channel.A brief review of CE-OFDM system,the application of channel prediction in TAS/MRC diversity systems,combined TAS/MRC diversity and relay selection in AF cooperative communication system were presented in chapter 1.The low bound expression for the average symbol error rate(ASER)of CE-OFDM system with TASP/MRC diversity under MPSK and rectangular MQAM modulation over Rayleigh block fading channel was drived in chapter 2,theoretical calculation and computer simulation results were also given.The low bound expression for the ASER of the variable gain AF cooperative system using CE-OFDM and combined feedback delay transmit antenna selection(TASD)VMRC diversity under MPSK or rectangular MQAM modulation over Rayleigh fading channel was drived in chapter 3,theoretical calculation and computer simulation results were also given.The symbol error performance of AF cooperative system with relay selection using CE-OFDM and MMSE Wiener channel prediction over Rayleigh block fading channel was studied,and the low bound expressions for the average bit error rate(ABER)of the above AF cooperative system with fixed gain or variable gain AF protocols and rectangular MQAM modulation were derived respectively in chapter 4,theoretical calculation and computer simulation results were also given.The conclusion of this thesis was given in chapter 5.