一种用于无线信道的逐幸存处理均衡器

Equalizer Based on Per-survivor Processing for Wireless Channel

提出了一种适用于无线时变信道的逐幸存处理均衡器。通过训练序列得到信道参数的初始估计值,此后在Viterbi算法进行网格搜索的过程中,使得每一条幸存路径维持各自的信道参数,并在确定幸存分支后利用历史幸存序列对信道参数值进行更新,实现了信道参数的无时延估计。仿真结果表明,在无线时变信道环境下,逐幸存处理均衡器的性能明显优于其他传统均衡器。

An adaptive MLSE receiver based on per-survivor processing （PSP） for digital transmissions over high frequency （HF） channels is proposed in this paper. In the proposed receiver, initial channel impulse response （CIR） is estimated with a training sequence and updated adaptively during the trellis searching by survivor sequence according to each survivor states. Computer simulation results over HF channels are presented and BER performance of the adaptive RSSE-PSP receiver is compared with other receivers such as adaptive DFE and suboptimal MLSE. The results verify the effectiveness of the proposed receiver in the HF environment.