A single integrated circuit multi-standard demodulator includes an adaptive inverse
channel estimator for frequency domain equalization which employs a recursive least
square cost function in estimating the inverse channel from the received signal
and an error estimate. Utilizing a diagonal correlation matrix, the solution to
may be determined utilizing fewer computational resources than required by conventional
frequency domain equalizers, shifting from a computational intensive to memory
intensive implementation. The memory requirement is fully satisfied by memory available
within conventional OFDM decoders, and the necessary computational resources may
be readily mapped to the resources available within such decoders, improving integrated
circuit cost-effectiveness of the multi-standard demodulator.
