Joint suppression of PAPR and sidelobe of hybrid carrier communication system based on WFRFT

A novel joint suppression method of peak to average power ratio (PAPR) and sidelobe power of hybrid carrier (HC) system based on weighted-type fractional Fourier transform (WFRFT) is proposed in this paper. PAPR and sidelobe power are restrained through pulse shaping in frequency domain and windowing in time domain respectively. Undesired peak regeneration emerges as a result of time windowing for out of band radiation suppression and pulse shaping is applied as a united technique to suppress PAPR with scarcely affecting on system performance. Flexible selections of WFRFT parameter α, shaping parameter β, and windowing parameter γ are employed for multi-objective optimization of the proposed HC framework. A multichannel model is then proposed according to the parameter analysis.