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Preformance Analysis of LTE-A System Uplink with Differential Precoding Scheme  

Li, Xun (School of Information and Communication Engineering, Chungbuk National University)
Park, Noe-Yoon (School of Information and Communication Engineering, Chungbuk National University)
Kim, Young-Ju (School of Information and Communication Engineering, Chungbuk National University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.49, no.5, 2012 , pp. 37-43 More about this Journal
Abstract
The closed-loop multiple-input multiple-output (MIMO) system has been adopted by long term evolution (LTE) system. Many techniques are proposed to enhance the transmission of LTE's advanced version to meet the increasing requirement, in which differential codebook gains a lot of interest. Previous researches on designing differential codebooks focused on quasi-diagonal unitary matrix which cannot guarantee the equal gain property. The equal gain property is very important to uplink because the performance of uplink is very sensitive to the peak-to-average power ratio (PAPR). In this paper, we derive the analytical expression of average bit error rate and PAPR for differential precoding MIMO system. Using the analytical results, we investigate the performances of several differential precoding schemes considering non-linear amplifier at the transmitter. Some selected simulation results indicate that the conventional differential precoding schemes have good performances without the consideration of non-linear amplifier. While considering non-linear amplifier, the proposed differential codebook outperforms other differential precoding schemes because it maintains the equal gain per transmit antenna.
Keywords
LTE-A; SC-FDMA; Differential codebook; PAPR;
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Times Cited By KSCI : 2  (Citation Analysis)
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