PAPR Reduction in MIMO OFDM System Using ZCT Technique
Journal: International Journal of Science and Research (IJSR) (Vol.3, No. 8)Publication Date: 2014-08-05
Authors : Roshni Gulwani; Ekant Sharma;
Page : 717-720
Keywords : MIMO; OFDM; PAPR; STBC; ZCT;
Abstract
An Arrangement of using OFDM system with space time block coded - multiple input multiple output (STBC-MIMO) System provides excellent performance against Multi-path effects and frequency selective fading. However, one of the major drawback of MIMO-OFDM have high peak-to-average power ratio (PAPR) in order to the signals transmittted on different antennas. In this paper, we propose Zadoff-Chu matrix Transform (ZCT) technique to reduce the peak-to-average power ratio (PAPR) with precoding and postcoding Alamouti STBC MIMO-OFDM system. To reduce the high PAPR, BPSK modulation techniques is used for different values of N (64, 128, 256). Our proposed work shows that ZCT POSTCODED based STBC MIMO-OFDM SYSTEM has the lowest PAPR performance compared to ZCT PRECODED based STBC MIMO-OFDM SYSTEM. MATLAB simulation shows that the performance of the proposed algorithm significantly improves the PAPR reduction.
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