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| Application of Rayleigh Quotient-Desampling FIR Filter in Passive Location System Using the FM Broadcast Signals |
| Zhao Hong-li; Wu Tie-ping; Bao Zheng |
| Key Lab. of Radar Signal Processing Xidian Univ., Xi’an 710071 China |
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Abstract According to the characteristic of coherent pulse compression in the passive location system using the FM broadcast signals, the desampling FIR filter is necessary and feasible. The maximum of SNR after coherent pulse compression is defined as the proper criterion for the design of the desampling filter. The relation of the SNR and the coefficients of the filter adopted is deduced. The steps by the Rayleigh quotient method to obtain the optimal desampling FIR filter are also presented. The results of simulation show that the proposed method achieves good SNR despite its low computation complexity.
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Received: 09 December 2003
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2005, Vol. 27 
