低复杂度频域迭代均衡技术

Frequency Domain Iterative Equalization Technology with Low Complexity

迭代均衡技术是一种利用信道译码反馈提高接收机性能的关键技术,信道译码器输出译码软信息,通过译码反馈能够重建发送信号,并根据反馈信号的可靠性更新前端信道均衡器的系数。通过频域实现均衡器系数的计算,具有较低的计算复杂度。随着总体迭代次数的增加,最终迭代均衡器能够收敛,从而消除多径信道引入的符号间干扰的影响,提高接收机的可靠性。

Iterative equalization technology is a key technology to improve the receiver performance by using the channel decoding feedback.The channel decoder outputs decoding soft information.The transmitted signal can be reconstructed according to decoding feedback,and the coefficients of the channel equalizer are updated according to the reliability of the channel decoding feedback of the previous iteration.With calculating the coefficients in the frequency domain,the iterative equalizer has low computational complexity.As the number of iterations increases,the iterative equalizer can converge,thereby eliminating the influence of inter-symbol interference introduced by the multipath channel and improving the reliability of the receiver.