Method and apparatus to balance maximum information rate with quality of service in a MIMO system

In a wireless MIMO communication system, for N symbols of a frame of information, allocating N1 symbols to a stronger eigen sub-channel and N2 symbols to a weaker eigen sub-channel, where N1>N2; determining a probability of reception error when transmitting the N2 symbols through the weaker eigen...

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Bibliographic Details
Main Authors RAGHOTHAMAN BALAJI, IONESCU DUMITRU M
Format Patent
LanguageEnglish
Published 06.10.2009
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Summary:In a wireless MIMO communication system, for N symbols of a frame of information, allocating N1 symbols to a stronger eigen sub-channel and N2 symbols to a weaker eigen sub-channel, where N1>N2; determining a probability of reception error when transmitting the N2 symbols through the weaker eigen sub-channel for an auxiliary signal-to-noise ratio; solving for a quality of service QoS of the weaker eigen sub-channel and if the QoS is less than a desired QoS, decreasing the value of N and repeating allocating symbols, determining the probability of reception error and solving for the QoS. Another aspect includes asymmetrically allocating spreading codes to a stronger eigen sub-channel and to a weaker eigen sub-channel such that the stronger eigen sub-channel is allocated more spreading codes than the weaker eigen sub-channel; and transmitting all systematic bits of turbo coded information over the stronger eigen sub-channel.
Bibliography:Application Number: US20040940060