Adaption feedback of precoding matrix indicator for 3GPP LTE/LTE-A system

Adaption feedback of precoding matrix indicator for 3GPP LTE/LTE-A system

Limited feedback of channel state information (CSI), which is made up of rank indicator (RI), precoding matrix indicator (PMI) and channel quality indicator (CQI), is an important part in closed-loop transmission for 3GPP Long Time Evolution (LTE)/LTE-Advanced standard. In this paper, an efficient w...

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Bibliographische Detailangaben
Hauptverfasser: Linli Cui, Chaoran Qi, Yuan Chen, Zhenhai Shao
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Bandwidth
Bit error rate
Channel estimation
Fading
LTE
MIMO
PMI
Precoding
System performance
Throughput
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Beschreibung
Zusammenfassung:Limited feedback of channel state information (CSI), which is made up of rank indicator (RI), precoding matrix indicator (PMI) and channel quality indicator (CQI), is an important part in closed-loop transmission for 3GPP Long Time Evolution (LTE)/LTE-Advanced standard. In this paper, an efficient way, where PMI granularity selection method is used in PMI feedback mechanism, is presented to adaptively choose PMI granularity to track the channel variation, especially for fast fading channel. Simulation results show that the adaption feedback of PMI can get a better spectral efficiency and lower BER without much computational cost.
DOI:10.1109/HSIC.2012.6212976