RADAR RECEIVERS

摘要

A radar receiver (200) comprises an analogue receiver (230) for receiving a radar echo signal and a digital receiver (240). The digital receiver (240) includes an analogue-to-digital converter (300A-D) arranged to receive and sample an IF analogue signal from the analogue receiver (230). The sampling is undersampling according to the Nyquist criterion, so that a plurality of IF digital signals are produced, in different Nyquist zones, including one or more aliased IF digital signal. The digital receiver (240) is arranged to select an IF digital signal from the one or more aliased digital signals.

主权项

1. A radar receiver comprising:
(a) an analogue receiver unit for receiving a radar echo signal and arranged to convert the radar echo signal into an intermediate frequency (IF) analogue signal; and (b) a digital receiver including an analogue-to-digital converter arranged to receive the IF analogue signal from the analogue receiver and to sample the IF analogue signal, wherein the sampling by the analogue-to-digital converter is undersampling according to the Nyquist criterion, so that a plurality of IF digital signals are produced, in different Nyquist zones, including one or more aliased IF digital signals, the digital receiver being arranged to select an IF digital signal from the one or more aliased digital signals.