基于初始化参数传递的并行自适应判决反馈均衡方法

Parallel adaptive decision feedback equalization method based on initialization parameter passing

椭圆球面波(PSWFs)时域正交调制信号脉冲间正交性易受到信道特性影响,信道补偿方法中线性均衡方法补偿精度有限、现有判决反馈均衡方法对并行信号训练复杂度大。针对上述问题,提出了一种基于参数传递的并行自适应判决反馈均衡方法。采用初始化参数传递方式,实现多个并行均衡器的快速初始化,并运用输出加权平均模式转换机制,快速准确判断判决引导模式的切换时机。仿真结果表明,在FIR信道模型下,该方法具有较快的收敛速度和低复杂度,稳态误差较线性均衡方法和传统判决反馈均衡方法分别改善了4 dB和0.5 dB。

The orthogonality between pulses of time-domain quadrature modulated signals of prolate spheroidal wave functions(PSWFs) is easily affected by channel characteristics.Among the channel compensation methods, the linear equalization method has limited compensation accuracy and the existing decision feedback equalization method has high training complexity for parallel signals. To solve these problems, a parallel adaptive decision feedback equalization method based on initialization parameter passing is proposed. The initialization parameter transfer method is used to realize the fast initialization of multiple parallel equalizers. The output weighted average mode conversion mechanism is used to quickly and accurately judge the switching time of decision-making mode.The simulation results show that the proposed method has fast convergence speed and low complexity, and the steady-state error is improved by 4 dB and 0.5 dB respectively compared with linear equalization method and traditional decision feedback equalization method.