A novel constellation amplitude modification method for PAPR reduction in OFDM systems

作者：Ni, Chunxing; Ma, Yahui; Jiang, Tao^*

来源：Wireless Communications and Mobile Computing, 2016, 16(18): 3307-3315.

DOI：10.1002/wcm.2760

• orthogonal frequency division multiplexing (OFDM)
• peak-to-average power ratio (PAPR)
• constellation amplitude modification (CAM)
• interior-point method (IPM)

In this paper, we propose a constellation amplitude modification (CAM) method to reduce the peak-to-average power ratio (PAPR) in orthogonal frequency division multiplexing systems. The key idea of the proposed CAM method is to modify the original constellation amplitude and choose the constellation points with the minimum PAPR as the transmitted constellation points. The CAM method formulates the PAPR reduction as a convex optimization problem, and then, it applies the customized interior-point method to solve the optimization problem. Compared with the traditional methods, the CAM method does not increase the transmit power, and the receiver has no additional operations. Simulation results show that the CAM method converges fast and offers significant PAPR reduction.

• 出版日期2016-12-25
• 单位华中科技大学