Patent ID: 7586997
Filing Date: 2009-09-08
Classification: H04B,H04L

Abstract:
1. A method comprising: selecting a set of four symbols from a set of symbols that represent data; encoding a set of four interleaved symbols that represent the set of four symbols, each interleaved symbol from the set of four interleaved symbols being generated by combining a first part of one symbol with a second part of one other symbol; and transmitting the encoded set of four interleaved symbols using a plurality of transmit antennas, wherein two transmit antennas of the plurality of transmit antennas transmit a first combination of the set of four interleaved symbols over a first transmission sub-carrier channel and a second combination of the set of four interleaved symbols over a second transmission sub-carrier channel, wherein each transmitter antenna of the plurality of transmitter antennas transmits over at least two transmission channels; wherein the set of four symbols includes values from at least one constellation; and further comprising rotating the constellation to form a rotated constellation when at least one of a real and an imaginary part of one symbol from the constellation is the same as at least one of a real and imaginary part of another symbol in the constellation.