Interception of LPI radar signals

The interception problem is reviewed, an LPI radar design is examined and the performance of intercept receivers of the future is considered. The receiver needed to intercept LPI signals must respond across a broad band and provide noncoherent integration capabilities over times comparable to the coherent (or noncoherent) integration times used by radars. One useful receiver design is the rapidly swept superheterodyne receiver (RSSR). The band must be swept in a time which is short compared to the time the radar signal dwells at one frequency. The IF bandwidth of the RSSR must be wide enough to accommodate the pulse compression phase/frequency modulation used by the radar.<>