Patent ID: 8818199

Claim:
A correlation system, comprising: a transmitter configured to transmit a correlation sequence; receive circuitry configured to receive a plurality of returns from the transmitted correlation sequence; a plurality of correlators coupled to the receive circuitry and configured to correlate the correlation sequence with the returns to provide a set of correlation measurement values respectively associated with the returns, wherein the set comprises a respective correlation measurement value from each of the correlators, each of the correlation measurement values corresponding to a respective distance from the transmitter and indicative of a condition at the corresponding distance; a correlation error compensation (CEC) element configured to identify at least one of the correlation measurement values corresponding to a distance from the transmitter greater than at least a finite impulse response (FIR) length for the transmitted sequence, the CEC element further configured to define a value indicative of a correlation error floor for the returns based on the one correlation measurement value identified by the CEC element, wherein the CEC element is configured to combine the value indicative of the correlation error floor with at least one of the correlation measurement values thereby canceling the correlation error to provide at least one compensated correlation measurement value.