Random Coding Error Exponent And Applied Research For MIMO Wireless Communication Systems

In Multiple-Input Multiple-Output(MIMO)communication system,we can use space-time block coding(STBC),combinations of transmit antenna selection combining(SC)and receive antenna maximum ratio combining(MRC)to improve the transmission reliability of flat fading channel,as well as space-frequency block coding(SFBC)to improve the transmission reliability of frequency selective fading channel.In practice,ideal CSI is generally difficult to obtain,therefore,study the RCEE of imperfect CSI STBC fading channel has practical significance.The performance of SC/MRC antenna diversity on Rayleigh fading channel is better than STBC with the same number of transmit and receive antennas,SFBC is an effective measure to overcome the adverse effects of frequency selective fading,therefore,this paper studies the RCEE of the combined SC/MRC system over the flat fading channel,and the RCEE of the SFBC system over frequency selective fading channel.Chapter 1 introduces the current research situation of STBC,SFBC,SC/MRC and the research status error exponent of Single-Input Single-Output,Single-Input Multiple-Output,MIMO fading channel.Chapter 2 elaborate the system model of MIMO wireless communication system and the analytical theory of RCEE,ergodic capacity,cutoff rate and expurgated exponent.Using the Meijer G-function,Chapter 3 derives the exact expression of RCEE,ergodic capacity,cutoff rate and expurgated exponent of single user SFBC-OFDM system and multi-user scheduling SFBC-OFDM system on Rayleigh fading channel with limited average power and perfect CSI.The numerical results show that,for a single-user SFBC-OFDM system,with higher average signal-to-noise ratio,we can get the greater RCEE and ergodic capacity.For multi-user SFBC-OFDM systems,we can improve the RCEE,ergodic capacity and cutoff rate by increasing the number of the users.Using the Meijer G-function and U hypergeometric function two methods,Chapter 4 derives the exact expression of RCEE,ergodic capacity,cutoff rate and expurgated exponent of imperfect CSI single user STBC system on Rayleigh fading channel and perfect CSI combining STBC and scheduling system over Nakagami-m fading channel with limited average power and imperfect CSI.The numerical results show that,for the imperfect CSI single user STBC system,with higher correlation coefficient between the estimated channel and the actual channel(the greater the absolute value,the closer to the perfect CSI),and higher average signal-to-noise ratio,we can get greater RCEE and ergodic capacity.For perfect CSI combining STBC and scheduling system,we can improve the RCEE and ergodic capacity by increasing the number of the users.Using the Meijer G-function,Chapter 5 derives the exact expression of RCEE,ergodic capacity,cutoff rate and expurgated exponent of SC/MRC system on Nakagami-m fading with limited average power and perfect CSI.The numerical results show that we can improve the system RCEE and ergodic capacity by improve the channel fading coefficient and design the the transmitted and received antennas.Chapter 6 is the conclusion of this thesis.