CE-OFDM在信道预测收发分集下的误码性能

Performance Analysis of CE-OFDM System with Channel Prediction and Joint Transceiver Diversity

采用最小均方误差(MMSE)信道预测器和组合发射天线选择(TAS)/接收最大比合并(MRC)天线分集技术,设计了一种时间选择性瑞利块衰落信道上恒包络正交频分复用(CE-OFDM)无线通信系统实现方案。利用矩生成函数法和高斯Q函数的另一种表达式,推导了采用矩形正交幅度调制的CE-OFDM系统平均误符号率(ASER)的下界表达式。仿真结果验证了CE-OFDM系统ASER理论下界的准确性;调制系数较小时,该下界可用于设计采用MMSE信道预测器和TAS/MRC天线分集的CE-OFDM系统。

Using the minimum mean square error(MMSE) channel predictor and combined transmit antenna selection(TAS)/receiving maximum ratio combining(MRC) antenna diversity technique,the wireless communication system scheme with constant envelope orthogonal frequency division multiplexing(CE-OFDM) on the time-selective Rayleigh block fading channel was designed.By using the moment generating function method and another expression of Gaussian Q-function,the low bound expression for the average symbol error rate(ASER) of the CE-OFDM system with rectangular quadrature amplitude modulation was derived.The simulation results verify the accuracy of the low bound expression for the ASER of the CE-OFDM system.The above lower bound can be used to design the CE-OFDM system with the MMSE channel predictor and the TAS/MRC antenna diversity when the modulation coefficient is small.