Variable pulse repetition frequency in the wide-swath SAR

In terms of most of the wide-swath SAR methods, more than one sub-swaths are imaged simultaneously, while most SARs use a single antenna for both transmitting and receiving, which will result in a blind range. A technique of variable pulse repetition frequency is studied for solving the blind-range problem. The difference of pulse periods makes the blind ranges of each pulse stagger, and then the blind range of one pulse can be sampled in other pulses. The variation formula of sampling rate with the technique is derived. The signal processing approach is given, and the effect of nonuniform sampling on image is also discussed. At last the simulation result is given.