Patent ID: 7379016
Filing Date: 2008-05-27
Classification: G01S

Abstract:
1. A detection system for expanded time microwave or millimeter wave radars, optical radars or time domain reflectometers, comprising: a transmitter for transmitting a transmit burst, wherein the burst comprises two or more cycles of radio frequency waves or amplitude modulated light waves, a receiver for receiving the transmit burst and echoes of the transmit burst and for producing an expanded time receiver output, wherein the receiver output comprises a detected transmit burst and a detected echo burst, a threshold detector for producing an analysis window that is at least two cycles of the detected echo burst in duration if the detected echo burst exceeds a threshold value, a pulse envelope detector for producing an envelope pulse of the detected echo burst, wherein the envelope pulse includes a voltage peak, a time-of-peak detector for detecting the voltage peak and for producing a time-of-peak pulse, a comparator for threshold detecting cycles within the detected echo burst and for producing a carrier signal; and a receive echo detector for producing a stop pulse during the analysis window in response to the time-of-peak pulse and the carrier signal.