Abstract: Based on uniform linear array, a testing method of tag signals in the coherent multi-path environment is presented. Followed by weighted spatial smoothing MUSIC algorithm, the Direction Of Arrival(DOA) of coherent multi-path signals is estimated. Based on the DOA, weights are adjusted using Linear Constrained Minimum Variance(LCMV) criterion. By adapting Digital Beamforming(DBF) technique, adaptive directional beam is formed to increase the success rate of testing tag signals in the coherent multi-path environment. Experimental results confirm the availability of the testing method.

Key words: tag signals, weighted spatial smoothing, Direction Of Arrival(DOA), Digital Beamforming(DBF)

摘要： 以均匀直线阵为基础，提出一种在相干多径环境下检测标签信号的方法。结合加权空间平滑技术的MUSIC算法对相干多径信号的波达方向进行估计，根据波达角用线性约束最小方差准则调整权值，通过数字波束形成技术产生自适应定向波束，达到提高在相干多径环境下检测标签信号成功率的目的。实验结果证明了该检测方法的有效性。

关键词: 标签信号, 加权空间平滑, 波达方向, 数字波束形成

CLC Number: 

• TN015