Patent ID: 8687737

Claim:
A system, comprising: a first converting circuit for converting a signal from a first receiver to a first baseband signal; a first estimating circuit for estimating a first signal quality metric of the first baseband signal; a comparing circuit for comparing the first signal quality metric to a predetermined threshold to determine whether the first signal quality metric meets a signal quality, and for providing an alarm to a processor each time the first signal quality metric does not meet the signal quality; a circuit for determining whether each alarm from the comparing circuit satisfies an alarm condition, and for providing a flag when the alarm condition is satisfied, the circuit for determining comprising the processor; and a switching circuit for switching from the first baseband signal to a second baseband signal generated by a second receiver in response to the flag; wherein the first estimating circuit comprises: a determining circuit for outputting, for each of n symbols of the first baseband signal, a first signal that is a function of a distance between a location of the symbol and an associated predetermined ideal symbol location; and a dividing circuit for outputting an average signal that is representative of an average of the distance for the n symbols.