Patent ID: 7424066

Claim:
A receiver for processing a transmission signal that has a transmission frequency and a selectable transmission bandwidth, the receiver comprising: a local oscillator that provides a local oscillator signal; a quadrature mixer that provides I and Q analog signals in response to said transmission signal and said local oscillator signal; I and Q converters that convert said I and Q analog signals to I and Q digital signals; first and second digital multipliers; and a controller configured to: a) when said transmission bandwidth is selected to be above a predetermined bandwidth threshold, command the frequency of said local oscillator signal to be said transmission frequency; and b) when said transmission bandwidth is selected to be below said bandwidth threshold, command the frequency of said local oscillator signal to be offset from said transmission frequency by an intermediate frequency that is at least one half of said transmission bandwidth and command said first and second multipliers to each multiply a sum of said I and Q digital signals by cosine and sine of said intermediate frequency; and further including: first and second digital filters; and first and second multiplexers; wherein said controller is configured to: a) when said transmission bandwidth is above said bandwidth threshold, command said first and second multiplexers to respectively direct signals from said I and Q converters to said first and second digital filters; and b) when said transmission bandwidth is below said bandwidth threshold, command said first and second multiplexers to respectively direct signals from said first and second multipliers to said first and second digital filters.