Patent ID: 7684511
Filing Date: 2010-03-23
Classification: H04B,H04L

Abstract:
1. A method comprising: receiving at least one input stream of communication signals; generating a plurality of transmit signals from the at least one input stream by transforming the at least one input stream, the transforming including applying a phase shift, to information of the at least one input stream; wherein the phase shift includes a phase shift of tones of the at least one input stream, and wherein the phase shift is approximately wherein k represents a tone index and N represents a number of the tones; and transmitting each one of the plurality of transmit signals by a respective one of a plurality of antennas, wherein collective transmission of the plurality of transmit signals form a radiation pattern that appears to originate from at least one virtual antenna, wherein a number of the virtual antennas is fewer than a number of the plurality of antennas.