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Random stepped frequency (RSF) radar, which transmits random-frequencypulses, can suppress the range ambiguity, improve convert detection, andpossess excellent electronic counter-countermeasures (ECCM) ability [1]. Inthis paper, we apply a sparse recovery method to estimate the range and Dopplerof targets. We also propose a cognitive mechanism for RSF radar to furtherenhance the performance of the sparse recovery method. The carrier frequenciesof transmitted pulses are adaptively designed in response to the observedcircumstance. We investigate the criterion to design carrier frequencies, andefficient methods are then devised. Simulation results demonstrate that theadaptive frequency-design mechanism significantly improves the performance oftarget reconstruction in comparison with the non-adaptive mechanism.

Cognitive Random Stepped Frequency Radar with Sparse Recovery