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New PAPR Reduction Method for Spatial Modulation
Yulong Shang(상위롱),Hojun Kim(김호준),Hongjoong Kim(김홍중),Taejin Jung(정태진) 한국통신학회 2014 韓國通信學會論文誌 Vol.39 No.1(통신이론)
In this paper, a new peak-to-average power ratio (PAPR) reduction method for spatial modulation(SM) is presented. By using the matrix with all non-zero elements to precode the signals before transmitting, the transmit power is scattered over all transmit antennas for achieving the goal of PAPR reduction. If this matrix is also an unitary matrix, the distribution of transmit power over transmit antennas will be uniform and it also could retain the characteristic of avoiding inter channel interference (ICI) due to the orthogonality of unitary matrix. In case of a non-ideal amplifier, the proposed method can produce a considerable improvement that increases with a number of transmit antennas in performance. Furthermore, the new scheme achieves an identical performance with conventional one in the case of ideal amplifier.