Patent ID: 8112051
Filing Date: 2012-02-07
Classification: H04B

Abstract:
1. A method for identifying a presence of a desired signal to avoid false frequency lock in a Frequency Modulation (FM) receiver, the method comprising: receiving a signal; determining a first energy of the signal, the first energy being the strength of the signal; identifying the presence of the desired signal, if the first energy is above a first threshold; determining an Intermediate Frequency (IF) count of the signal; identifying the presence of the desired signal, if the IF count is below a second threshold; determining a second energy; identifying the presence of the desired signal, if the second energy of the signal is above a third threshold; identifying the presence of the desired signal, if an absolute difference between a first Received Signal Strength Indication (RSSI) value and a second RSSI value of the signal is below a fourth threshold; determining a third energy, the third energy being an energy of noise in the signal; and identifying the presence of the desired signal, if the third energy is below a fifth threshold.