Patent ID: 7710314

Claim:
A pulse radar ranging system, comprising: transmit pulse generator means for generating transmit pulses at a transmit clock frequency; sampling pulse generator means for generating sampling pulses at a sampling clock frequency slightly different from the transmit clock frequency; a first signal mixer having a first signal input and a second signal input, the first signal input being coupled to the sampling pulse generator means; a second signal mixer having a first signal input and a second signal input; directional coupling means having a first port coupled to the transmit pulse generator means, a second port coupled to an antenna, a third port coupled to the second signal input of the first signal mixer, and a fourth port; signal processing means; splitting means arranged between the sampling pulse generator means and the respective first signal inputs of the first and second signal mixers to divide the sampling pulses into first sampling pulse portions conveyed to the first signal mixer and second sampling pulse portions conveyed to the second signal mixer; and signal delay means arranged between the fourth port of the directional coupling means and the second signal input of the second signal mixer.