一種適用于異步DS-CDMA系統(tǒng)的低復雜度DOA估計算法
A Low-Complexity DOA Estimation Algorithm for Asynchronous DS-CDMA Systems
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摘要: 針對異步DSCDMA系統(tǒng)的多用戶環(huán)境，該文提出了一種低復雜度的DOA估計算法。該算法首先去除多址干擾及噪聲項的影響，并構造出一組包含有感興趣信息的相關陣；然后采用傳統(tǒng)的MUSIC算法即可從這些矩陣中準確地估計出各DOA信息。算法具有計算量小，估計精度高等優(yōu)點。仿真實驗驗證了算法的有效性。
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關鍵詞:
- 波達方向估計; 智能天線; 空時信號處理
Abstract: In this paper, a low-complexity DOA estimation algorithm is presented for asynchronous DS-CDMA systems with multipath propagation. First, the influence of multiacess interferences and noise is eliminated. Then, a group of correlation matrices constituted by the interested DOAs is derived. Finally, according to the conventional MUSIC algorithm, DOAs are resolved preciously from the above matrices. The algorithm has the advantages of low computation burden and high resolution. Simulation results confirm the effectiveness of the algorithm. -
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