Turbo均衡的误码率性能分析及应用

对Turbo均衡系统中的分量编码器、约束长度、交织长度、迭代次数、码率等参数进行了系统分析,在log-MAP算法基础上,仿真出了这些参数与误码率之间的定量关系,并分析了Turbo均衡在高斯白噪声信道和瑞利信道中的不同表现,为Turbo均衡的具体应用提供了可靠的参数选择依据。针对短波信道不稳定,短波电台数传误码率高的情况,设计了以Turbo均衡为核心的无线增强解决方案,并通过仿真验证了其在不同信噪比条件下降低误码率的效果。

The Performance Analysis and Application on BER of Turbo Equalization

This paper mainly analyses the parameters of Turbo Equalization system such as branch encoder, restriction length, interlace length, interactive times, code rate. Based on log-MAP decoding algorithm, the relationship between these parameters and BER on AWGN and Rayleigh channel were simulated, and the evidence for parameters selection was provided. According to the high BER of shortwave radio set because of fluctuation channel, a kind of wireless communication method on Turbo equalization is designed. And it is certified as reducing the BER by the simulation result on difference S/N.