PAPR Reduction in MIMO-OFDM Systems by Using the Modified PTS Scheme

• Main Authors: Ying-Hao Kuo, 郭迎豪
• Other Authors: 曾德樟
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/6n8292

碩士 === 國立臺北科技大學 === 電子工程系研究所 === 103 === Multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) systems have become a popular technique in wireless communications because of its potential in reaching the high data rate. However, the MIMO-OFDM systems still suffer from the high peak-to-average power ratio (PAPR) in the transmitted signals. Although the partial transmit sequences (PTS) provides good performance for PAPR reduction without introducing any signal distortion, extra bits should be transmitted for the side information (SI) to recover the original signal at receiver, resulting in the decrease of the spectral efficiency. This study aims to investigate the effect of both PAPR reduction and the spectral effi-ciency. Signals are multiplied by the phase offsets between different transmit antennas to avoid transmitting the SI at transmitter. In addition, the Zadoff-Chu (ZC) precoding matrix is employed to improve the performance of PAPR. Simulation results show that the proposed scheme can offer good performance of PAPR without the transmission of SI, resulting in the improvement of the spectral efficiency.