一种基于分数间隔的判决变步长恒模算法

为了解决盲均衡技术中恒模算法收敛速度和收敛精度与步长矛盾的问题,在引入反馈因子的同时提出了一种反馈变步长恒模算法。通过仿真分析表明,该算法比传统的恒模算法收敛速率更快、稳定性更好。为了进一步降低短波信道中存在的码间串扰,将分数间隔均衡器与盲均衡相结合,提出了一种基于分数间隔的反馈变步长恒模算法。相比其它算法而言,该算法可明显改善均方误差性能,具有重要的实际意义。

A Feedback-Variable-Step Constant Modulus Algorithm

To alleviate the incompatibility between convergence speed and convergence precision of constant modulus algorithm,the feedback-variable-step constant modulus algorithm is proposed,while a feedback factor introduced.Simulation shows that the proposed algorithm has higher convergence speed and stability as compared with the traditional constant modulus algorithm.To further eliminate inter-symbol interference in the HF channel,fractionally-spaced equalizers-based feedback-variable-step constant modulus algori...