Controlling Filter Bandwidth Based On Blocking Signals

A method comprising:

• determining in a controller of a radio receiver whether at least one blocker signal is present in a blocking spectrum surrounding a desired radio channel;
• if no blocker signal is present, controlling a channel filter of a signal processing path of the radio receiver to operate at a first bandwidth;
• if a first blocker signal is present, controlling the channel filter to operate at a second bandwidth less than the first bandwidth;
• and
• if the first blocker signal and a second blocker signal are present on opposing sides of the desired radio channel, controlling the channel filter to operate at a third bandwidth less than the second bandwidth when a beating signal based on the first and second blocker signals is greater than a threshold level.

An apparatus comprising:

• a deviation estimator coupled to a signal processing path of a radio receiver to estimate a peak frequency deviation of a first blocker signal of a first blocking channel adjacent to a desired signal channel, the deviation estimator including:
• a first decimator to receive and decimate a complex signal from the signal processing path;
• a mixer to downconvert the complex signal to a lower sampling rate;
• a second demodulator to demodulate the lower sampling rate complex signal into a demodulated signal, the second demodulator separate from a first demodulator that demodulates the desired signal channel;
• a second decimator to decimate the demodulated signal;
• and
• a DC circuit to generate a pilot RMS signal, a peak frequency deviation signal, and a frequency offset signal from the demodulated signal.