Aiming at the problem of convergence difficulty and the big residue Mean Square Error(MSE)existed in high-order QAM signal equalization,this paper proposes the Coherent Integration based T/4 Fractionally Spaced Multi-Modulus blind equalization Algorithm(CIFSMMA)on the basis of analyzing the Multi-Modulus blind equalization Algorithm(MMA),T/4 Fractionally Spaced Multi-Modulus blind equalization Algorithm(FSMMA)and coherent integration algorithm.The underwater acoustic channel simulation results with 128QAM s...
1引言在水声通信系统中,由于带宽受限和多径传输等引起的码间干扰(Inter Symbol Interference,ISI)严重影响了通信质量,因此,需要采用有效的信道均衡技术[1]将ISI消除。在所有盲均衡算法中,常模算法由于结构简单、性能稳健而被广泛应用于QAM通信系统。然而,对于高阶QAM信号,常?