IMPROVED EQUALIZATION FOR ZERO-PREFIX OFDM SYSTEMS

摘要

The system, apparatus, and method (300) of the present invention provide sub-optimal channel equalization techniques for zero-prefixed orthogonal frequency division modulation (OFDM) systems that retain the performance of least-squares equalization but are not as complex. The technique of the present invention improves equalization performance with less complexity than required by minimum-mean-squared-error (MMSE) equalization as well. The channel matrix is rendered circulant and then truncated where the eigenvalues are small.