Precoder for spatial multiplexing, multiple antenna transmitter

摘要

A method of spatially precoding data includes determining a transmission rank of a communication channel and selecting a set of one or more precoding filters derived from a single generator matrix based on said transmission rank. The method also includes precoding data for transmission to a remote device using said precoding filters in a predetermined order according to a predetermined precoding sequence. The precoding may include using different ones of said precoding filters during different precoding intervals in a predetermined precoding period of the predetermined precoding sequence. Additionally, precoding data for transmission may involve traversing an Orthogonal Frequency Division Multiplexing (OFDM) resource block in an alternating pattern during said predetermined precoding period.

主权项

1. A method of spatially precoding data in a channel independent way, said method comprising:
selecting a transmission rank based on a transmission rank of a communication channel; selecting a set of one or more precoding filters equivalent to column subsets of a single generator matrix based on said selected transmission rank; and precoding data for transmission to a remote device using different ones of said precoding filters during different precoding intervals in a precoding period of a predetermined precoding sequence; wherein selecting a set of one or more precoding filters comprises selecting one or more columns of the generator matrix for each precoding filter, and wherein the number of columns selected for each precoding filter equals the transmission rank; and wherein the ordering of said precoding filters in said predetermined precoding period is such that, for a selected transmission rank, non-overlapping fixed-size groups of consecutively used precoding filters do not have any columns in common.