Interference rejection method based on multiple sub-band projections

摘要

This invention describes a cognitive radio signal processing where interference is mitigated using multiple frequency spatial projection to orthogonalize interference. The method is based on the well-known LMS solution of W=(ATA)−1*d that is computed from received multi antenna and multicarrier signals in a novel way.

主权项

1. An OFDM symbols cognitive radio receiver signal processing method where interference is mitigated using multiple frequency domain spatial projections to orthogonalize interference comprising:
said OFDM symbols cognitive radio receiver receiving multiple receive signals that are each received using individual receive antennas; said OFDM symbols cognitive radio receiver transforming said each received signal using Fourier or Fast Fourier Transforming resulting in complex outputs that are subcarriers containing subcarrier data for each OFDM symbol; said OFDM symbols cognitive radio receiver processing said subcarrier data for each OFDM symbol by concatenating adjacent subcarrier data from groups of two or more consecutive OFDM symbols and then said OFDM symbols cognitive radio receiver creating a vector of multiple sub-band frequency domain spatial projections from said concatenated adjacent subcarrier data from groups of two or more consecutive OFDM symbols; and, said OFDM symbols cognitive radio receiver multiplying said multiple received antenna signals by said vector to orthogonalize interference.