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针对电磁频谱衰落信道中常规恒模盲均衡算法对所接收信号相位变化不敏感的缺点,研究了一种即携带接收信号的幅值信息,同时还携带接收信号相位信息的修正恒模盲均衡算法。论文在对修正恒模盲均衡算法进行推导的基础上,利用电磁频谱衰落信道,仿真了高阶正交幅度调制信号的修正恒模盲均衡算法性能。仿真结果表明,修正恒模算法在均衡后星座图不仅汇聚程度大幅提高,而且纠正了由电磁频谱衰落信道带来的相位偏转,在收敛速度和降低残余符号间干扰方面均改善了均衡器的性能。
Aiming at the shortcomings that the conventional constant modulus blind equalization algorithm in the electromagnetic spectrum fading channel is insensitive to the phase change of the received signal, a modified constant modulus blind equalization algorithm which carries the amplitude information of the received signal and also carries the phase information of the received signal is studied. . Based on the derivation of the modified constant modulus blind equalization algorithm, the paper simulates the performance of the modified constant modulus blind equalization algorithm for the high order quadrature amplitude modulated signal by using the electromagnetic spectrum fading channel. The simulation results show that the modified constant modulus algorithm not only greatly enhances the convergence of the balanced constellation, but also rectifies the phase deflection caused by the fading channel of the electromagnetic spectrum and improves the equalizer performance in terms of convergence speed and reduction of residual intersymbol interference .