Algorithm for Equalizing Rectangular Signal Constellations

A rectangular-constellation-based blind-equalization (RECBEQ) technique implemented by a real-time, recursive algorithm has been developed to improve the performances of radio receivers in recovering unknown signals that are modulated with digital information and that have been distorted in propagation by multipath channels and carrier offsets. The technique is so named because it is intended specifically to enable the equalization of large-order rectangular signal constellations; for example, that of quadrature amplitude modulation (QAM).