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Ambiguity Function Analysis of OFDM Radar Signals


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Ambiguity Function Analysis of OFDM Radar Signals
ZHANG Wei1TANG Xi-yuan2GU Hong1SU Wei-min1
1. School of Electronic Engineering and Optoelectronic Technology,NUST,Nanjing 210094,China; 2. School of Microelectronics,Shanghai Jiao Tong University,Shanghai 200240,China
radar signal analysis orthogonal frequency division multiplexing ambiguity function
To address the problem of waveform design, the periodic ambiguity function of orthogonal frequency division multiplexing( OFDM) radar signals is derived and its relationship with the modulating sequences is indicated. Multiple-period ambiguity function is further studied and the characteristics of the side-lobe are analyzed. A corresponding coherent pulse train processing method is proposed to reduce the Doppler side-lobe. Simulation results of Barker codes modulated OFDM radar signal are presented. This approach requires no direct computation of the modulated signals and the ambiguity is derived from the modulating sequence.


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Last Update: 2012-10-23