Precoding codebooks for 4TX and 8TX MIMO communication systems

摘要

A method for communication includes configuring a communication system that includes a transmitter and a receiver with first precoding matrices for mapping up to N data streams onto N transmit antenna ports of the transmitter. Each of at least some of the first precoding matrices are derived from respective second and third precoding matrices. The second and third precoding matrices are configured for mapping data onto respective numbers of transmit antenna ports that are less than N. The data streams are mapped onto the N transmit antenna ports using a precoding scheme based on one of the first precoding matrices. The mapped data streams are transmitted over the N transmit antenna ports from the transmitter to the receiver.

主权项

1. A method for communication, comprising:
configuring a communication system that includes a transmitter and a receiver with a first codebook of first matrices for mapping up to N data streams onto N transmit antenna ports of the transmitter, each of at least some of the first matrices derived from second matrices, at least some of which are drawn from a second codebook for mapping data onto a number of transmit antenna ports that is less than N, wherein no matrix of the first codebook suitable for mapping can be expressed as a weighted permutation of the columns of another matrix in the first codebook; mapping the data streams onto the N transmit antenna ports using a mapping scheme based on one of the first matrices; and transmitting the mapped data streams over the N transmit antenna ports from the transmitter to the receiver.