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Study on Key Technology of Super-resolution Direction-of-arrival Estimation

Author: ZhangYingHui
Tutor: ZengHao
School: Chongqing University
Course: Communication and Information System
Keywords: DOA Estimation Array signal processing Spatial spectrum estimation MUSIC algorithm
CLC: TN911.23
Type: Master's thesis
Year: 2010
Downloads: 87
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Abstract


Array signal processing as the signal processing field is an important branch , through the array element of the plurality of sensors is set to a different location in the space , thereby forming a sensor array using an array of this group at the same time the space signal receiving and processing , and its purpose is the extracted array of the received signal and its characteristic information , while suppressing interference and noise. DOA estimation is an important branch in the array signal processing , also known as the spatial spectrum estimation , the basic problem is to determine simultaneously the spatial location of the signal in a particular area within the space more interested , that various signal reaches the array reference element the direction of the angle. In recent years , various algorithms for DOA estimation achieved fruitful results , and its increasingly sophisticated theory . On the basis of the papers in the access to a large number of domestic and foreign scientific and technical literature data , around DOA estimation technology and its various algorithms to do the following : ① introduced the principle of DOA estimation , analysis of the basic model of the array antenna narrowband array the mathematical model of the signal , the mathematical model of the broadband array signal array signal processing and statistical models . ② analysis of traditional DOA estimation algorithm , the research and simulation analysis of their estimated performance , and compared these algorithms . ③ narrowband MUSIC algorithm based on sub- space , for lack of the algorithm is high , the peak search process improvements , get a quick peak search method and the theoretical analysis and computer simulation of the algorithm , and prove that algorithm compared to the traditional MUSIC spectrum peak search method to calculate reduced by 30-50%. ④ broadband MUSIC algorithm based on subspace estimation performance under different bandwidth conditions through simulation comparison , the final conclusion: decrease of signal bandwidth , signal DOA estimation accuracy becomes higher and higher .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Communication theory > Information Theory > Signal detection and estimation
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