基于维纳模型的非线性信道接收端均衡方案

Receiving-end Equalization Scheme for Nonlinear Channel Based on Wiener Model

针对功率放大器的非线性问题和多径信道引起的时间色散,提出了一种接收端联合补偿方案。由基于维纳模型的均衡器实现,该均衡器由一个线性滤波器级联一个多项式滤波器组成,所有运算均在接收端完成。仿真结果显示,经过非线性均衡的误码率性能比无非线性均衡时有很大改善,在同一误码率下,信噪比至少降低了3.5 dB。

A receiver processing scheme for the compensation of the nonlinearity of high power amplifier and time dispersion brought by the multipath channel is proposed in this paper. It is implemented by a Wiener-model-based equalizer, which consists of a linear filter followed by a polynomial filter. All calculations are accomplished at the receiver. Simulation results show that, comparing with equalization without nonlinear part, the bit error rate （BER） performance of the system is improved a lot by introducing a polynomial equalizer, the signal-to-noise ratio （SNR） is reduced by at least 3. 5 dB under the same BER.