Method for jointly adapting an OFDM waveform and the demodulator for interference mitigation and harsh channels

The present invention provides a method and system for a processing multicarrier signal to create a spectral correlation across multiple antennas. The system includes at least one transmitter adapted to create a plurality of symbols, each symbol representing one or more bits from a plurality of bitstreams. The transmitter creates a plurality of repetition patterns, each pattern containing a copy of the symbols and each repetition pattern comprising a combination of symbols that varies in time, frequency and space. The repetition patterns are transmitted over and received by one or more separate antennas where a receiver demodulates the repetition patterns and linearly combines each repeated symbols across time, frequency and space to estimate said transmitted symbol.