新角度配對法之二維訊號方位估計

Two-Dimensional DOA Estimation with a New Angles Pairing Method

張議仁(Yi-jen Chang)

指導教授 ： 張大中

國立中央大學/資訊電機學院/通訊工程學系/碩士(2015年)

摘要

本篇論文提出一種新穎的利用兩個均勻線性陣列(uniform linear arrays,ULAs)估計二維(two-dimensional,2-D)到達的角度(direction-of-arrival，DOA)的仰角角度(elevation angles)與方位角角度(azimuth angles)的配對方法，本篇論文提出利用最大概似估計(Maximum Likehood Estimation Pairing,MLP)的方法來配對入射到每一個均勻線性陣列的訊號，使得在估計多訊號源的到達角度時可以自動地配對仰角角度與方位角角度，在結果的分析與比較中，本篇論文所提出的方法有較過去的方法在較小的角度間隔與較多的訊號源個數能夠有比較好的性能，且與過去不需要額外加入配對演算法就能自動地配對仰角角度與方位角角度的演算法能夠有比較好的角度精準度與較低的計算複雜度。

關鍵字

陣列訊號處理 ； 關聯方法 ； 到達方向估計

並列摘要

A novel method is presented in this paper for pair matching of
elevation and azimuth angles in a two-dimensional
direction-of-arrival estimation problem, employing the antenna
configuration of two uniform linear arrays. The proposed method
exploits maximum likelihood estimation to pair two individual DOA
angles in a 3-D space from the received signals impinging on each ULA,
and consequently, multiple sources' DOAs can be identified
automatically. Simulation results show that the proposed method has
better performance in case of small angular separation among multiple
signal sources compared to the conventional methods.The proposed
method also has less computational complexity and higher estimation
accuracy than the previously published works.

並列關鍵字

array signal processing ； correlation methods ； direction-of-arrival estimation

參考文獻

[1] R. O. Schmidt, “Multiple emitter location and signal parameter esti-

mation,”IEEE Trans.Antennas and Propagation, vol. 34, no. 3, pp.

[2] F. Yan, “Low-complexity doa estimation based on compressed MU-

and Signal Processing, vol. 37, no. 7, pp. 984 –995, Jul 1989.

[4] A. Swindlehurst, “Azimuth/elevation direction finding using reg-