一种改进的减少状态逐幸存处理均衡器

Improved Reduced State Pre-Survivor Processing Equalizer

提出了一种带有FIR前置滤波器的减少状态逐幸存处理均衡器.该均衡器通过训练序列估计信道的特性,利用RLS算法对信道的估计值进行更新.在RSSE PSP处理之前加入一个FIR前置滤波器,使全信道近似呈现最小相位特性.该FIR滤波器为一个信道匹配滤波器和一个预测误差滤波器的级联,采用Levinson Durbin算法进行求解.仿真结果表明,该均衡器在具有符号间干扰的信道中比传统均衡器有着更优异的性能.

An improved reduced-state sequence estimation (RSSE) receiver based on per-survivor processing (PSP) in conjunction with a FIR pre-filter is proposed in this paper. The channel impulse response (CIR) is estimated with a training sequence and updated adaptively by RLS algorithm during the data transmission. A FIR pre-filter prior to the RSSE-PSP is exploited to reshape the CIR to have approximately a minimum phase property. The pre-filter consists of the cascade of a channel-matched filter and a prediction-error filter, which can be calculated via the Levinson-Durbin algorithm. Computer simulations indicate that the proposed equalizer with a pre-filter works much better than other conventional equalizers in ISI channel.