Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Comparison of the Normalized SNRs between the LPA Beamformer and the Conventional Beamformer for a Moving Source

  • Seokjin Sung (Multimedia Communication Systems Lab., Department of Infor & Comm., K-JIST) ;
  • Hyunduk Kang (Multimedia Communication Systems Lab., Department of Infor & Comm., K-JIST) ;
  • Kim, Kiseon (Multimedia Communication Systems Lab., Department of Infor & Comm., K-JIST)
  • Published : 2003.07.01
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Abstract

The DOA(Direction Of Arrival) estimation to select a best beam for receiving a particular signal in switched beam antenna systems, and to shape the optimal beam in adaptive array antenna systems, is typically performed under the assumption that the target user motion is almost negligible. In this paper, we model the user as the time-varying source and adopt the LPA(Local Polynomial Approximation) tracking algorithm, proposed by Katkovnik, to solve the time-varying DOA estimation problem. Then, we compare the power spectrum functions between the LPA beamformer and the conventional beamformer, also, the normalized SNRs of each beamformer. The results show that the LPA beamformer is robuster than the conventional beamformer in tine-varying environments. In addition, in case of the conventional beamformer, more array elements give rise to more degradation in the aspect of SNR.

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