Patent ID: 8724999

Claim:
An optical communication system comprising: a polarization multiplexed orthogonal frequency-division multiplexing POLMUX-OFDM transmitter for generating a POLMUX-OFDM double sideband signal; an optical processing for processing the double sideband signal from the transmitter to generate a wavelength division multiplexed (WDM) POLMUX-OFDM single sideband signal; an optical processing receiver coupled to the said optical processing path for receiving the single sideband POLMUX-OFDM signal processed by the said optical path; and a computationally-efficient block-diagonal multiple-input multiple-output MIMO equalizer responsive to the receiver for enabling correct operation for a completely random incoming signal polarization state without adaptive polarization control at said receiver, which enables complexity and power consumption reduction; wherein receiver side optical processing in the form of parallel polarization-orthogonal optical filters is used for removal of polarization-rotated optical carriers.