信道估计误差与延迟对自适应Turbo编码调制的误码率性能影响

Effect of channel estimation error and delay on BER performance of adaptive Turbo coded modulation

提出了一种慢衰落信道上较为实用化的自适应Turbo编码调制(ATuCM)设计方案,并着重研究了信道估计误差与延迟对ATuCM的误码率(BER)性能的影响,最后通过计算机真对理论分析结果加以验证。分析和仿真结果表明,为了维持系统所需的BER性能,固定估计误差值应小于0.07dB,随机估计误差的离差要低于0.6,而时间延迟应控制在0.001/(v/λc)以内。

The fairly pragmatic design scheme of adaptive turbo coded modulation (ATuCM) used in slowly fading channels is presented in this paper, then the influence of channel estimation error and delay on ATuCM bit error rate (BER) performance is studied emphatically and finally its theoretical analysis results are verified with the computer simulation. Its results show that in order to maintain desired BER performance the fixed estimalion error should be less than 0.07 dB, thd deviation of random estimation error should be less than 0.6, and the time-delay should be controlled within 0.001/(v/λc).