FEEDBACK SCHEDULING TO REDUCE FEEDBACK RATES IN MIMO SYSTEMS

In a closed-loop wireless communication system (200), a codebook-based feedback (201.1) control mechanism is provided where feedback from each of a plurality of receivers is scheduled to control the feedback so that the receiving devices do not needlessly feed back precoding information to the trans...

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Bibliographic Details
Main Authors HUANG KAIBIN, KOTECHA JAYESH H
Format Patent
LanguageEnglish
Korean
Published 20.05.2010
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION
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Summary:In a closed-loop wireless communication system (200), a codebook-based feedback (201.1) control mechanism is provided where feedback from each of a plurality of receivers is scheduled to control the feedback so that the receiving devices do not needlessly feed back precoding information to the transmitting device. The feedback may be controlled by establishing and distributing a schedule to control when each receiver feeds back precoding information (201.1), or by establishing and distributing a metric-based feedback threshold that must be satisfied before feedback is permitted. 폐루프 무선 통신 시스템(200)에서, 수신 장치들이 불필요하게 프리코딩 정보를 송신 장치(302)에 피드백하지 않도록 피드백을 제어하기 위해 복수의 수신기들(304.1 - 304.3) 각각으로부터의 피드백이 스케줄링되는 코드북 기반의 피드백(201.1) 제어 메커니즘이 제공된다. 피드백은 각 수신기가 프리코딩 정보(201.1)를 피드백하는 때를 제어하기 위한 스케줄(310)을 확립하고 분배하는 것에 의해, 또는 피드백이 허용되기 전에 만족되어야 하는 메트릭 기반의 피드백 스레시홀드(704, 706)를 확립하고 분배하는 것에 의해 제어될 수 있다.
Bibliography:Application Number: KR20107004717