METHODS AND SYSTEMS FOR COMBINED CYCLIC DELAY DIVERSITY AND PRECODING OF RADIO SIGNALS

摘要

In a transmitter or transceiver, signals can be precoded by multiplying symbol vectors with various matrices. For example, symbol vectors can be multiplied with a first column subset of unitary matrix which spreads symbols in the symbol vectors across virtual transmit antennas, a second diagonal matrix which changes a phase of the virtual transmit antennas, and a third precoding matrix which distributes the transmission across the transmit antennas.

主权项

1. A method for transmitting information signals having a plurality of symbol vectors associated therewith on a radio channel comprising:
precoding said symbol vectors by multiplying said symbol vectors with:
a first column subset of a unitary matrix which spreads symbols in said symbol vectors across all virtual transmit antennas,a second diagonal matrix which changes a phase of said virtual transmit antennas, anda third precoding matrix which distributes transmit energy across physical transmit antennas, further processing said precoded symbol vectors to generate said information signals, and transmitting said information signals.