Simple construction of OFDM signals with diversity gain and low PAPR

A simplified orthogonal frequency division multiplexing (OFDM) system with low peak-to-average power ratio (PAPR) and frequency diversity is proposed. The considered OFDM system exploits a frequency diversity by using a simple symbol repetition as is the case in previous work (i.e. Ko et al., MILCOM2002). From the presented results, it can be seen that a modified OFDM signal can be easily implemented with low PAPR, still maintaining the same diversity gain at the receiver as in Ko et al. However, a small increase of decoding delay may be expected.