Patent ID: 7920839
Filing Date: 2011-04-05
Classification: H04B

Abstract:
1. A system for detecting a broadcast channel in a radio receiver, comprising: a receive signal strength indicator (RSSI) element configured to develop an RSSI signal that is representative of a power in a desired channel; a switchable bandwidth channel select filter having a power detector configured to compare a power output of the desired channel and at least one channel adjacent to the desired channel to develop a signal to adjacent channel power ratio (SACPR) signal that is representative of the noise in the desired channel, the switchable bandwidth channel select filter including logic configured to determine an amount of noise in the at least one channel adjacent to the desired channel; and a seek element configured to determine whether the RSSI signal is greater than a predetermined RSSI threshold and configured to determine whether the SACPR signal is greater than a predetermined SACPR threshold.