A blind SLM PAPR reduction scheme using cyclic shift in STBC MIMO-OFDM system

Abstract

In this paper, we propose a blind SLM scheme using cyclic shift (BSLM-CS) in STBC MIMO-OFDM. After an OFDM signal sequence in each transmit antenna is cyclically shifted, alternative signal sequences in the proposed scheme are generated by linearly combining OFDM signal sequences using addition and subtraction without the need of the additional IFFT. Therefore, the proposed BSLM-CS scheme has low computational complexity for transmitting the alternative signal sequence with the lowest PAPR. In oder to recover the data at the receiver without side information, the ML decoder for the BSLM-CS scheme can be derived similar to the conventional BSLM scheme. The BER performance of the proposed scheme is not degraded com pared to the conventional SLM scheme with the perfect side information.