Patent ID: 7362802

Claim:
A frequency domain equalization system to compensate for wireless communication time-constant and time-varying channel effects, residual carrier frequency offset, and sampling frequency offset arising in a received complex signal comprising: an equalizer tap calculation circuit cooperating with an equalizer tap tracking circuit to correct the time-constant and time-varying channel effects; a phase tracking circuit to correct the residual carrier frequency offset; and a timing tracking circuit to correct the sampling frequency offset; where the received complex signal is inputted from a Fast Fourier Transform (FFT) circuit and a corrected complex signal is outputted to a soft decision demapper; where the equalizer tap calculation circuit is configured to generate a corrective tap signal to use in correcting the complex signal; where pilot signals are extracted for use in the phase and timing tracking circuits; where the complex signal comprises 52 complex subcarriers; and wherein the corrective tap signal is generated by applying a sign least mean squares algorithm to the 52 complex subcarriers.