Patent ID: 6256485
Filing Date: 2001-07-03
Classification: H04B

Abstract:
A wideband radio receiver, comprising:means for distributing an input signal to a plurality of output terminals;a timing circuit;a plurality of frequency domain samplers connected respectively to said output terminals for receiving said input signal, each of said frequency domain samplers including,means for generating a repetitive frequency sweep signal timed in response to said timing circuit;a first mixer for mixing said input signal and said sweep signal to produce a first mixer output signal;a frequency weighting filter connected to receive said first mixer output signal and produce a filtered signal;means for generating a first fixed frequency local oscillator signal;a second mixer for mixing said filtered signal and said first fixed frequency local oscillator signal to produce a second mixer output signal;a dispersive delay line connected to receive said second mixer output signal and produce a compressed signal;means for generating a second fixed frequency local oscillator signal;means for phase shifting said second fixed frequency signal to produce a quadrature phase second fixed frequency local oscillator signal;a third mixer for mixing said compressed signal with said second fixed frequency local oscillator signal to produce an inphase (I) baseband signal;a fourth mixer for mixing said compressed signal and said quadrature phase second fixed frequency local oscillator signal to produce a quadrature (Q) baseband signal;means for digitizing said I and said Q baseband signals to produce I and Q digital signal samples;means for convolving said I and said Q digital signal samples with a correction coefficient to produce digital I and Q output signals, said convolving for equalizing the response between said frequency domain samplers;means for storing said digital I and Q output signals for a selected time period;means for monitoring said digital I and Q outputs from said frequency domain samplers; andmeans for reading selected ones of said stored digital I and Q output signals to produce a series of digital outputs comprising an output signal from said wideband radio receiver.