Efficient modulation and demodulation methods for multi‐carrier communication

The modulation and demodulation problems for efficient multi‐carrier communications are considered in this study. To maintain compact spectrum and realise dense multi‐carrier transmission, a novel modulation method based on random hopping position, namely time hopping m ‐ary phase position shift keying (TH‐MPPSK), is proposed to remove the discrete spectrum. Then, a multi‐carrier scheme without guard interval among subcarriers is provided to reduce complexity in the practical communication systems. Moreover, a novel demodulation method is proposed to improve the efficient communication performance. Simulation results demonstrate that the TH‐MPPSK can significantly remove the discrete spectrum and the proposed demodulation method can satisfactory performance.