| Summary: | 碩士 === 國立中山大學 === 電機工程學系研究所 === 103 === A high peak-to-average power ratio (PAPR) is one of drawbacks in quasi-orthogonal space block code (QOSFBC) multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems. Selected mapping (SLM) method is a well-known method that can reduce PAPR significantly. However, it requires transmitting side information (SI) to the receiver, which causes degradation in the date rate. In addition, the computational complexity of the SLM method is extremely high. In this thesis, two PAPR reduction schemes without SI are proposed for the QOSFBC MIMO OFDM system, where the candidate signals are generated in the frequency and time domains. With the use of the proposed SI detection algorithm, the SI can be detected successfully at the receiver. Simulation results show the proposed schemes reduce the PAPR effectively. In addition, the side information can be successfully obtained at the receiver. Therefore, the bit error rate of the proposed schemes with the proposed SI detection algorithm is close to that of the case in which the SI is perfectly known at the receiver.
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