将观测数据的噪声建模为α稳定分布,运用分数低阶统计量理论中的共变概念和最小分散系数准则,结合用于解决高维非线性最小二乘优化问题的松弛搜索思想,借鉴高分辨率多径时延估计算法WRELAX、DS-WRELAX,提出了一种韧性的高分辨率多径时延估计算法RHMTDE。理论分析和仿真结果表明,该算法有抗粗差的能力,在高斯噪声和脉冲噪声环境中都可以较好地估计出多径观测信号中每径的时间延迟。
In the presence of noise modeled as a stable distribution, a robust high-resolution multipath time delay estimation algorithm (RHMTDE) is proposed based on fractional lower order statistic(FLOS). This method estimates hlgh-resolution time delays through relaxation idea and least dispersion criterion in Gaussian and impulsive noises environments. It is shown that the proposed approach is robust through theoretical analysis and numerical examples.