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A Novel LTE Downlink Codebook for Rician Fading Channels  

Yan, Zhi Fei (Division of Information & Communication Engineering, Chungbuk National University)
Kim, Young-Ju (Division of Information & Communication Engineering, Chungbuk National University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.48, no.1, 2011 , pp. 70-76 More about this Journal
Abstract
LTE Re1-10 aims at peak. data rates of 1Gbits/s for the downlink and 500 Mbits/s for the uplink, which can be accomplished by not only wide spectrum but also advanced MIMO techniques such as precoded MIMO and cooperative relays. Considering some relays can have more direct signal paths than mobile stations do, LoS components are examined to build more efficient codebooks for Rician channels. The proposed codebooks perform better than the existing LTE codebooks as the criterium of LoS, K-factor increases. Conserving the advantages and max-min chordal distance of the existing LTE codebooks, the proposed ones also maximize the minimum chordal distances between codewords over Rician fading channels. Link-level simulation with LTE system parameters confirm the performance improvements as the value of K increases.
Keywords
LTE; Codebook; Rician fading; MIMO-OFDM; Relays;
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