Quantization of channel state information in multiple antenna systems

摘要

A method of transmission over multiple wireless channels in a multiple antenna system includes storing channel modulation matrices at a transmitter; receiving quantized channel state information at the transmitter from plural receivers; selecting a transmission modulation matrix using the quantized channel state information from the stored channel modulation matrices; and transmitting over the multiple channels to the plural receivers using the selected transmission modulation matrix. In another embodiment, the method includes storing, at one or more receivers, indexes of modulation matrices generated by a capacity enhancing algorithm; upon a selected one of the one or more receivers receiving a transmission from the transmitter, the selected receiver selecting a modulation matrix from the stored modulation matrices that optimizes transmission between the transmitter and the selected receiver; the selected receiver sending an index representing the selected modulation matrix; and receiving the index at the transmitter from the selected receiver.

主权项

1. A method performed by a transmitter having multiple antennas for transmission over multiple wireless channels, the method comprising:
storing pre-calculated channel precoding matrices at the transmitter; receiving multiple indices of quantized channel state information at the transmitter from a plurality of receivers; selecting a channel precoding matrix from the stored channel precoding matrices based at least on the multiple indices of quantized channel state information received from the plurality of receivers, wherein the selecting is further based at least on a predefined ratio of metrics determined by a combination of the precoding matrices indicated by quantized channel state information received from the plurality of receivers; and transmitting over the multiple channels to the plurality of receivers using the selected channel precoding matrix.