Patent ID: 6920333

Claim:
A decision feedback equalizer for combining the significant component signals of a multipath-fading signal together and eliminating all the other component signals, comprising: a first filter, which is coupled to receive a first combined signal, for eliminating the interference of future samples to the sample under consideration; a second filter, which is coupled to receive a second combined signal, for eliminating the interference of past samples to the sample under consideration; a first delay device for producing a delayed signal by delaying its input signal for a certain amount of time so that said delayed signal can align up with the signals from said first filter; a summation circuit for combining the signals from said first delay device, said first filter, and said second filter to produce a modified signal; a signal generator, which is coupled to receive signal from said summation circuit, for exacting information about each significant component signal of said modified signal and producing said second combined signal; a second delay device, for delaying said modified signal from said summation circuit for a certain amount of time so that its output signal can align up with the said second combined signal from said signal generator; and a coefficient updating device, which is coupled to receive signals from said second delay device and said signal generator, for producing adjusting signals to update the coefficients in said first filter and said second filter.