Patent ID: 7239580
Filing Date: 2007-07-03
Classification: G01S

Abstract:
1. A system for estimating a range of at least one object in an environment, comprising: a transmitter configured to transmit at least one first signal through a predetermined transmission medium within the environment, the first signal having a predetermined frequency range and an associated center frequency, wherein the first signal travels through the transmission medium until it strikes at least one object, thereby generating at least one second signal reflected from the object; and a sub-system including a cross correlator, the cross correlator being operative to receive representations of the first and second signals, and to perform at least one cross correlation operation on the first and second signals to detect at least one cross correlation peak, the sub-system being operative to estimate the range of the object based on the detected cross correlation peak, wherein the sub-system is further operative to estimate a signal-to-noise ratio (SNR) in the environment, the SNR being at least partially dependent upon the frequency associated with the first signal, and to control the transmitter to dynamically change at least the frequency associated with the first signal based on the estimated SNR.