NDLI: A time domain beamforming method of UWB pulse array

Content Provider	IEEE Xplore Digital Library
Author	Wang Min Wu Shunjun
Copyright Year	2005
Description	Author affiliation: Nat. Lab of Radar Signal Process., Xidian Univ., Xi'an, China (Wang Min; Wu Shunjun)
Abstract	The principle of space-time processing is discussed here after a realistic UWB pulse model introduced in the paper. The problem of realization of variable delay circuits is addressed. Delay line is not enough for accurately beam steering. A digital filter method by compensating channel dispersed delay for time domain beamforming is presented here. An ideal system with fractional sample delay hat occurs in insufficient sample of UWB pulse signal is not realizable. The two filter approaches involving FIR and allpass filter are given to approximate casual and stable system with the fractional delay. The Lagrange interpolation for FIR filter and complex cepstral computation for allpass filter are examined. A comparison of UWB pulse array directivity versus conventional phased array directivity has been done. The effect of different sampling rate and noise level is discussed. In the experiment, the FIR and allpass filter with a capability of accurate propagation delay compensation improved the beamforming performance remarkably. The results indicate the feasibility and effectiveness of the method.
Sponsorship	Nat. Capital Area Council IEEE Aerospace and Electron. Syst. Soc. RADAR Syst. Panel
Starting Page	697
Ending Page	702
File Size	317035
Page Count	6
File Format	PDF
ISBN	078038881X
DOI	10.1109/RADAR.2005.1435916
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-05-09
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Array signal processing Finite impulse response filter Phased arrays Added delay Circuits Delay lines Beam steering Digital filters Delay effects Lagrangian functions
Content Type	Text
Resource Type	Article

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