Patent ID: 8094751
Filing Date: 2012-01-10
Classification: H04L

Abstract:
1. A transmitter for wireless data communication comprising: a unitary rotation matrix processor for combining incoming information data stream and outputting a plurality of transmission symbols; an encoder for encoding the plurality of transmission symbols; M number of mapper units for mapping the symbols outputted from the encoder into a two dimensional constellation having M data symbols, where M is an integer greater than 1; M number of pulse shaper units, each for modulating a respective signal from the two dimensional constellation; and M number of antennas to transmit the M data symbols in M time slots responsive to the pulse shaper units, wherein each antenna transmits a respective data symbol from the M symbols in a respective time slot of the M time slots, wherein the encoder is configured to determine which symbol to be transmitted from each antenna in each time slot, wherein the unitary rotation matrix processor processes a unitary rotation matrix U satisfying the following condition to achieve full diversity: where, B=diag(β where β and W is a unitary matrix which in each of its columns, all entries have different nonzero values: