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Research on D0A Estimation Algorithm in Smart Antenna

Author: RenWeiDong
Tutor: LiuLiGuo
School: Shandong University
Course: Radio Physics
Keywords: Smart antenna Direction of Arrival Estimation Coherent signals MUSIC algorithm ESPRIT algorithm
CLC: TN821.91
Type: Master's thesis
Year: 2008
Downloads: 276
Quote: 0
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Abstract


Smart antenna using digital signal processing techniques to produce a spatial directional beam , so that the antenna main beam aligned with the arrival direction of the desired user signal , the sidelobes or nulling alignment interfering signal arrival directions , and to achieve full efficient utilization of the signal of the mobile user and to eliminate or suppress interference signals purposes. The smart antenna is divided into two categories : switched - beam smart antennas and adaptive array smart antennas . One of the smart antenna technology has been identified as the key technology of the third generation mobile communication systems , smart antenna technology will play an important role in the future mobile communication systems . This thesis is mainly in smart antenna technology DOA estimation algorithm research . First, a review of the course of development of the mobile communications and smart antenna overview of the basic principles of smart antenna DOA estimation . Then traditional DOA estimation algorithm simulation , the main delay - sum method and Capon minimum variance method . Finally, focus on the the subspace decomposition class algorithm , that the MSIC algorithm and ESPRIT algorithm , mainly including the classic MUSIC algorithm, spatial smoothing MUSIC algorithm , basic ESPRIT algorithm and Unitary ESPRIT algorithm . On the basis of the classical algorithm MUSIC algorithm , based on the spatial smoothing technique , key research smoothed class decorrelation MUSIC algorithm , and on this basis , to make some improvements . The improved algorithm can reduce the estimated time required , it is estimated that the performance is superior to the classical algorithms ; ESPRIT algorithm , on the basis of the basic algorithm , spatial smoothing technique , made ??some improvements , the improved performance of the algorithm to obtain a certain the improvement , the simulation results show the effectiveness of the improvement .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Radio equipment,telecommunications equipment > Antenna > Antenna: work principle > Smart antenna
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