Patent ID: 7822105

Claim:
A radio receiver apparatus in receipt of a spread spectrum radio signal having a first signal tracking channel and a second signal tracking channel, comprising: a demodulator that demodulates a first signal in the spread spectrum radio signal into the first signal tracking channel and a second signal in the spread spectrum radio signal into the second signal tracking channel; a crosscorrelator connected to the first signal tracking channel and the second signal tracking channel; a first signal processor that identifies a carrier wave jamming signal with the crosscorrelator that is in a mode to identify carrier wave jamming signals by correlation with a fixed predetermined code for a pseudo random number (PRN) code, where the crosscorrelator has a code of all ones for the PRN code; a first tracker that tracks the carrier wave jamming signal; a first signal canceller that subtracts a replica of the carrier wave jamming signal from the spread spectrum signal and generates a resultant spread spectrum signal; a second tracker that tracks the resultant spread spectrum signal; a second signal canceller that subtracts the resultant spread spectrum signal from the tracked carrier wave jamming signal and produces a clean carrier wave jamming signal; and a second signal processor connected to the first and second signal cancellers that receives the clean carrier wave jamming signal from the second signal canceller and generates the replica of the carrier wave jamming signal from the clean carrier wave jamming signal.