PAPR reduction using tone reservation for NC-OFDM transmissions

This study examines PAPR (Peak-to-Average Power Ratio) reduction using TR (Tone Reservation) for NC-OFDM (Non-Contiguous Orthogonal Frequency Division Multiplexing) transmissions, which are used in DSA (Dynamic Spectrum Access) networks such as CR (Cognitive Radio). In the TR method, scaling of time-domain peak reduction kernel signal affects only reserved tones in a given frequency domain according to Fourier transform principles. Since it does not interfere with PUs (Primary Users), it can be an optimal approach in CR network environment. In this paper, a method was considered to reduce PAPR for OFDM signals by reserving some tones among tones available to SU (Secondary User) for NC-OFDM systems.