New OFDM structure with parallel combinatory code

We propose a promising property for the transmitter using inverse fast Fourier transform (IFFT). Based on this property and parallel combinatory (PC) code, we propose a new parallel combinatory OFDM system. For different design requirements such as peak-to-average power ratio (PAPR) reduction or BER performance improvement, the system can select appropriate phase sets for all modulated subcarriers for each PC code. Compared with the original BPSK modulated OFDM system, the proposed system will achieve better PAPR characteristics or promising BER performance which also decreases the cost of handsets.