一种新的非对称分布源模型及方位估计

A New Non-Symmetric Distributed Source Model and Direction-of-Arrival Estimation

提出了一种空间非对称分布源信号模型和参数估计方法.利用多种连续分布函数,采用空间分段的方式描述相干分布源的角信号密度和非相关分布源的角功率密度,从而更加符合实际分布源的非对称特性.将DSPE方法推广到分段非对称分布源模型中,通过对分段非对称的相干和非相关分布源的计算机仿真,与对称高斯模型的对比结果验证了给出模型的有效性和估计算法的鲁棒性.

A new model for spatially non-symmetric distributed sources and parameter estimation algorithm is proposed. It divides practical spatial distribution into several successive phases, which is depicted with different continuum distribution functions to angular signal density of coherent distributed （CD） sources and angular power density of un-correlative distributed （UD） sources. The non-symmetric distribution practical scenario could be responded effectively with the new model. Estimation algorithm DSPE is extended to the new model for spatially non- symmetric distributed sources. Simulation has been done to compare the new model with symmetric distribution Gaussian model to CD and UD sources. The results have verified the effectiveness of the proposed model and robustness of the estimation algorithm.