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The Research and Hardware Implementation of Optimum Beamforming Technology

Author: KongWeiQi
Tutor: LiuJianXia
School: Taiyuan University of Technology
Course: Signal and Information Processing
Keywords: MVDR beamforming DOA Estimation ARM9263 Gauss - Jordan elimination method Soundness
CLC: TN911.7
Type: Master's thesis
Year: 2011
Downloads: 94
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Abstract


With the acceleration of the process of social information , personal mobile communication increasingly by people of all ages . The existing second - generation mobile communications network, regardless of the spectrum resources, or in the mobile services can not meet the growing demand of the people . In this case , the smart antenna technology , multi-antenna technology came into being , they can improve the utilization of the available spectrum resources , increase channel capacity . Beamforming technology is precisely one of the core technologies of smart antenna signal processing . The nature of the beam forming technology is the formation of the spatial filter , and to suppress the interference and noise component in the received signal , and to enhance the desired component in the received signal . This paper studies the spatial spectrum estimation to improve the optimal beamforming soundness minimum variance distortionless response (MVDR) , and by applying the constraint criteria MVDR beamformer ARM9263 microprocessor . Specific tasks include: (1) modeling and simulation analysis delay - sum method , Capon minimum variance method and the MUSIC algorithm in the spatial spectrum estimation . Incident signal direction of arrival estimation (DOA) to study its resolution level and the algorithm pros and cons . ( 2) the weighted conventional beamforming technology and nulling technology analysis and research . Simulation results show that the different spectral weighting technique so that the beam is formed with different properties, zero constraint technology can play the role of suppressing the interference signals . (3) for MVDR beamformer to produce the main beam of the mismatch problem diagonal loading technique and linear constraint technology , by applying a main beam to provide protection. The simulation results analysis shows that impose constraints criteria MVDR beamformer has excellent sound . (4 ) in the microprocessor ARM9263 realize the actual process of the optimal MVDR beamformer using Gauss - Jordan elimination method to solve the problem of the received signal covariance matrix inversion . Experimental results show that AT91SAM9263 micro processing in real time to achieve the MVDR optimum beam forming device , and can show a good performance .

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