Patent ID: 7164727
Filing Date: 2007-01-16
Classification: H04B,H04L

Abstract:
1. A method of transmitting data in a wireless communication system from a transmitter to a receiver, the method comprising: modulating data at the transmitter using a first modulation scheme to obtain a first data symbol, the first modulation scheme being a higher order modulation scheme and data bits mapped onto data symbols have different bit reliabilities depending on the chosen modulation scheme; transmitting the first data symbol to the receiver over a first diversity branch; modulating said data at the transmitter using a second modulation scheme to obtain a second data symbol; transmitting the second data symbol to the receiver over a second diversity branch; demodulating the received first and second data symbols at the receiver using first and second demodulation schemes corresponding to the first and second modulation schemes, respectively; and diversity combining the demodulated data, wherein: the first and second modulation schemes for the first and second diversity branches are selected such that after diversity combining the data bits of the demodulated data, the differences among the combined bit reliabilities are reduced, and the data for transmission is modulated using a single redundancy version scheme with an identical data bit sequence.