Patent ID: 8699589
Filing Date: 2014-04-15
Classification: H04L

Abstract:
1. A method for operating a communications device receiving a joint transmission from a plurality of communications controllers, the method comprising: performing channel estimation on a plurality of channels extending between the communications device and each of the plurality of communications controllers, thereby producing a plurality of channel estimates; combining the plurality of channels into a combined channel; computing a phase adjustment for the combined channel; computing feedback information using the plurality of channel estimates in accordance with the phase adjustment; quantizing the phase adjustment; transmitting the quantized phase adjustment and the feedback information to one or more of the plurality of communications controllers; and receiving simultaneous transmissions from the plurality of communications controllers, wherein the simultaneous transmissions are precoded in accordance with the feedback information, wherein the plurality of communications controllers comprises two communications controllers, and wherein computing the feedback information comprises computing a precoder for the combined channel that maximizes an effective channel H