任意阵列形状的欠定多目标方位估计

Underdetermined Multi-objective Orientation Estimation for Arbitrary Array Shapes

摘要:

随着人类社会对海洋认识和探索的深入,对水下监测和探测设备提出了更高的要求,探测阵列模型和阵列信号处理算法决定了监测和探测设备的复杂度。 针对特定水下多目标定位平台的复杂环境,建立了一种任意空间阵列数学模型,介绍了四阶累积量算法,分析了阵列信号处理中四阶累积量的阵列扩展特性。 基于四阶累积量的 MUSIC 算法的空间谱分析,建立了任意阵列形状的欠自由度多目标方位估计的理论基础。 计算机仿真结果表明了算法的正确性和有效性。

关键词:空间任意阵列;四阶累积量;MUSIC;欠定

Abstract:

With the deepening of human society's understanding and exploration of the ocean, higher requirements for un- derwater monitoring and detection equipment are put forward. Detection array model and array signal processing algorithm determine the complexity of monitoring and detection equipment. Aiming at the complex environment of specific underwater multi-target posi- tioning platform, this paper establishes an arbitrary spatial array mathematical model, introduces the fourth-order cumulant algo- rithm, and analyzes the array expansion characteristics of the fourth-order cumulant, the theoretical basis of DOA estimation for multi-target with less degrees of freedom in arbitrary array shape is established. Computer simulation results show that the algorithm is correct and effective.

Key words:spatial arbitrary array; fourth-order cumulant; MUSIC; underdetermined