PRECODING FOR SINGLE TRANSMISSION STREAMS IN MULTIPLE ANTENNA SYSTEMS

摘要

Precoding for multiple transmission streams in multiple antenna systems. Disclosed herein is a general method that transmits signal from multiple antennas using a one/two dimensional precoder. This precoder is fixed in a given resource block (RB) or slot, which is composed of P subcarriers and Q OFDM symbols (where the values for P and Q are greater than or equal to 1). The precoder in each resource block may take same or different values, which span the two dimensional time-frequency grid. The precoder is chosen as a function of either logical frequency index or physical frequency index of the RB.

主权项

1. An OFDM receiver comprising of a baseband portion, where said OFDM receiver receives a precoded OFDM transmit signal comprising of precoded pilot tones and precoded data tones, further where said precoded OFDM transmit signal relies on at least one of time index of a subcarrier of said precoded OFDM transmit signal; frequency index of said subcarrier; and time and frequency indices of said subcarrier and is transmitted using a plurality of antennas, said baseband portion further comprising of at least one means adapted for:
estimating channel state information using said precoded pilot tones; estimating interference covariance estimation using said precoded pilot tones; demodulating said precoded data tones; and computing filter weights using said channel state information and said interference covariance estimation.