基于QAM调制信号的构造函数盲均衡算法

基于QAM调制信号及常模算法(CMA),提出一种新的盲均衡算法—构造函数(CF)算法。该算法通过构造一个函数,使得QAM信号幅度取值点为该函数的零点,再充分利用QAM信号的确定信息,提高算法的收敛速度和精度。计算机仿真结果表明,该算法克服了传输引起的QAM信号相位模糊(或相位偏移)问题,并能快速收敛,因此有较好的性能。

A novel construction function blind equalization algorithm based on QAM signals

Based on QAM modulation and constant modulus algorithm(CMA), a novel blind equalization algorithm, the construction function(CF) algorithm is proposed. Through constructing a function which makes the values to be zero in the amplitude value points of QAM signals, CF algorithm improves the convergence speed and accuracy by using exact information of QAM signals. Computer simulations demonstrate that the CF algorithm can overcome the phase ambiguity (or phase offset)problem of QAM signals and so has good (performances.)