Patent ID: 7869497

Claim:
A frequency-domain decision feedback equalizer device for single carrier modulation comprising: a first section configured to generate an output signal and including a fast Fourier transformation circuit configured to perform a fast Fourier transformation on a first vector of signals inputted into said first section, and outputting a second vector of signals, a feed forward equalizer circuit configured and coupled to perform feed forward equalization by multiplying each of the components of said second vector of signals with equalization parameters, and outputting a third vector of signals, and an inverse fast Fourier transformation circuit configured and coupled to perform an inverse fast Fourier transformation on said third vector of signals, and outputting a fourth vector of signals; and a second section including a feedback filter circuit configured and coupled to perform linear filtering of a signal derived from an output signal of said second section, an adder circuit coupled to add the output signal of said feedback filter circuit to the output signal of said first section, and a detector circuit configured and coupled to receive the output signal of said adder circuit and generate said output signal of said second section by extracting samples from the output signal of said adding means.