Low Complexity Blind SLM for PAPR reduction of HF XL systems

The High Frequency (HF) multi-sideband transmission technology combines multiple 3KHz channels, which effectively improves the transmission rate of HF communication system, but also inevitably brings the defect of high peak-to-average-power ratio (PAPR). In this paper, a low-complexity blind selected mapping (SLM) algorithm for HF multi-sideband systems is proposed. Cyclic redundancy check (CRC) is performed on the received signal during phase recovery, and the result of the checksum can be used to determine whether the current signal is correctly recovered in phase. The expressions for the number of iterative computations are derived and the simulation results show that low-complexity blind SLM algorithm effectively reduces the computational complexity without increasing the bit error rate(BER).