A study on multibeam pulse chasing for bistatic radar

Autor: Shoji Matsuda, Shoichiro Fukao, Hiroyuki Hashiguchi
Rok vydání: 2005
Předmět:
Zdroj: Electronics and Communications in Japan (Part I: Communications). 89:11-21
ISSN: 1520-6424
8756-6621
DOI: 10.1002/ecja.20240
Popis: To improve the volume search efficiency of a bistatic radar with the transmitting antenna and the receiving antenna positioned apart, a known beam scanning method is pulse chasing that scans the receive beam at high speed in response to the propagation of the transmitted pulses. However, in normal pulse chasing, the receive beam width cannot be narrower than some value in order to receive all of the transmitted pulses without losses. In other words, a limit is the antenna gain cannot be increased. The problem is the receive signal-to-noise ratio (SNR) decreases compared to when pulse chasing is not performed. In this paper, we propose multibeam pulse chasing, a beam scanning technique using multiple receive beams based on digital beam forming, as the solution. We show that even if the transmitted pulse width is relatively long, if the number of multibeams is increased, the received SNR does not exhibit a decrease. Furthermore, we study a method to decrease the number of multibeams by dropping a portion of the receive pulses when pulse compression is applied as the transmission and reception methods, and present the computational result of the relationship between the number of multibeams and the received SNR when the Taylor window is applied. © 2005 Wiley Periodicals, Inc. Electron Comm Jpn Pt 1, 89(1): 11–21, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/ecja.20240
Databáze: OpenAIRE
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