Novel Method to Calculate Rank Indicator in LTE Systems
Wireless Communications, Networking and Mobile Computing（2011）
Abstract
Rank Indicator(RI) defined in Long Term Evolution (LTE) systems enables appropriate layers for spatial multiplexing streams in transmission. The RI calculation method is investigated based on reference signal (RS) channels and a novel RI calculation method is presented with low computational complexity by sampling RS channels. Compared to the optimal RI calculation method which indicated by full RS channels, the proposed method can achieve the near performance, while, the complexity for proposed method can be reduced linearly with the sampling granularity. Simulation results are shown to verify the effectiveness of the proposed method.
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Key words
long term evolution,communication complexity,signal sampling,space division multiplexing,wireless channels,lte system,rs channel sampling,computational complexity,long term evolution system,optimal ri calculation method,rank indicator calculation method,reference signal channel,spatial multiplexing stream,spatial multiplexing,downlink,accuracy,correlation,mimo
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