MIMO SLOW PRECODING METHOD AND APPARATUS

摘要

Pre-coder techniques disclosed herein are based on long-term statistical channel information for reducing channel feedback overhead and transmitter complexity. In an embodiment, a receiver (120) includes two or more receive antennas (140) spaced approximately ?/2 apart and a baseband processor (150). The baseband processor (150) computes channel correlations for different combinations of transmit antennas and each receive antenna (202) and averages the channel correlations over the different receive antennas to form a frequency-independent channel correlation matrix (204). The baseband processor (150) also computes a scalar representing noise variance at the receive antennas (206) and feeds back the frequency-independent channel correlation matrix and the scalar for use in performing transmitter pre-coding computations (208).