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基于双曲正切误差函数的常数模算法,利用误差函数曲线关于零误差对称性来降低稳态误差,因而具有实用性。为了用DSP实现该算法,在Matlab平台上,采用水声信道对该算法进行了仿真研究,得到最佳均衡器权长、变步长特性参数。在此基础上,进行了该算法的DSP硬件模块及软件编程流程的设计,给出了软件代码编写的关键点及DSP仿真结果。结果表明:该算法的DSP实现效果良好。
Based on the hyperbolic tangent error function of the constant modulus algorithm, the use of error function curve on the zero error symmetry to reduce the steady-state error, and therefore has practicality. In order to realize this algorithm with DSP, this algorithm is simulated by using underwater acoustic channel on the Matlab platform, and the parameters of the optimal equalizer weight and variable step size are obtained. On this basis, the design of DSP hardware module and software programming flow of the algorithm is carried out, and the key points of software code writing and DSP simulation results are given. The result shows that DSP of this algorithm works well.