A multi-carrier radio system in which pairs of subcarriers are positioned in frequency such that each subcarrier in a pair is the image of the other subcarrier in the pair. By making each subcarrier the image of another subcarrier, the radio system of the present invention permits highly integrated low-IF...http://www.google.ca/patents/US6081697?utm_source=gb-gplus-sharePatent US6081697 - Multi-carrier radio system and radio transceiver implementation
