Multi-tiered quantization of channel state information in multiple antenna systems

摘要

A multi-tiered CSI vector quantizer (VQ) is provided for time-correlated channels. The VQ operates by quantizing channel state information by reference to both the current channel state information and a prior channel state quantization. A system is also provided that uses multi-tiered CSI quantizers. Enhanced signaling between the transmitter and receivers is provided in order to facilitate the use of multi-tiered CSI quantizers.

主权项

1. An apparatus for quantizing channel state information in a multiple-input transmission system having at least a transmitter and a receiver, the apparatus comprising:
first quantizing means for quantizing information concerning a first channel state to produce first quantized information, and sending the first quantized information to the transmitter; and second quantizing means for quantizing information concerning a second channel state by reference to (1) the second channel state and (2) the first quantized information, to produce second quantized information, and sending the second quantized information to the transmitter.