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利用QPSK信号,在噪声环境下的多径信道中,对传统恒模算法(CMA)和判决导引恒模算法(DD-CMA)的盲均衡性能进行了分析和比较。分数间隔均衡(FSE)能够降低对时间同步误差的敏感性,提高收敛速度,降低稳态误差,具有更好的信道均衡性能。
Using QPSK signals, the blind equalization performance of traditional constant modulus algorithm (CMA) and decision-directed constant modulus algorithm (DD-CMA) is analyzed and compared in multipath channel under noisy environment. Fractional interval equalization (FSE) can reduce the sensitivity to time synchronization errors, improve the convergence rate, reduce the steady-state error, and have better channel equalization performance.