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| RANGE SUPER-RESOLUTION AT LOW SNR VIA INTERPULSE FREQUENCY HOPPING AND SIGNAL ENHANCEMENT |
| Liu Sheng; Xiang Jingcheng |
| Dept. of Electron. Eng., University of Electronic Science and Technology of China Chengdu 610054 |
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Abstract For linear and non-linear frequency modulation (LFM/NLFM) signals with large time-bandwidth product (TB),radar super-resolution in range domain at low SNR is investigated.A novel signal enhancement algorithm based on FFT for LFM/NLFM signals used for preprocessing,which significantly raises the effective signal-to-noise ratio(SNR),is presented.By use of decorrelation between echoes of different targets achieved by pulse-to-pulse carrier frequency hopping,a vvariety of approaches are suggested to further lower the SNR threshold for range super-resolution.Monte-Carlo simulation results are presented to illustrate the inproved performance.
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Received: 19 May 1997
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1998, Vol. 20 
