Adaptive coding and modulation

Details Adaptive coding and modulation Adaptive coding and modulation

2006-05-09

2006-05-09

Nguyen, Duc M. (Department: 2685)

Telecommunications

Transmitter

Plural modulation

C455S108000, C455S110000, C714S748000, C370S204000

Reexamination Certificate

active

07043210

ABSTRACT:
The present invention provides a unique feedback system in a wireless communication system wherein the transmission channel is always overloaded with data, which is configured and modulated at a select order of modulation. Based on the channel conditions, only a portion of the data can be successfully received. As such, the receiver will attempt to receive the data using demodulation techniques corresponding to the different levels of modulation used to encode the data transmitted. The receiver will determine the data that is recovered, or the highest order of modulation at which the data is recovered, and provide feedback to the transmitter. The transmitter will then retransmit the data that was not properly received. By overloading the channel at all times, the maximum amount of data capable of being transmitted over the channel is optimized without requiring or heavily relying on the receiver feeding back channel condition information to the transmitter.

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