A Dual-Function OFDM Waveform Design for Future Multicarrier Communication

This letter proposes a novel orthogonal frequency division multiplexing (OFDM) waveform termed MDS-OFDM-IM, in which the subcarriers are divided into two distinct groups with specific functions: peak-to-average power ratio (PAPR) reduction and error detection. The PAPR reduction subcarriers employ a selective mapping (SLM) scheme without side information, while the error detection subcarriers are modulated by a simple maximum distance separable (MDS) coded modulation scheme. In our design, the index modulation (IM) concept is exploited to the locations of PAPR reduction subcarriers for carrying extra information. Moreover, a novel power allocation strategy between the aforementioned two groups is proposed to balance system error and PAPR performances, which is formulated as an optimization problem and solved by a search-based method. Numerical results demonstrate the superiority of MDS-OFDM-IM over conventional OFDM and OFDM-IM in both error and PAPR performances.