An adaptive tone injection for OFDM PAPR reduction

Abstract

Abstract:We propose an ATI (Adaptive Tone Injection) scheme based on clipping noises for PAPR (Peak-to-Average Power Ratio) reduction of OFDM (Orthogonal Frequency Division Multiplexing) signals. The proposed scheme is composed of three steps: clipping, tone selection, and TI procedures. In the first step, the peak samples in the inverse fast Fourier transform outputs are scaled down by the clipping. In the second step, two tone positions where the powers of the real and imaginary parts of the clipping noises are the maximum, are selected. Finally, the generic TI procedure is performed for the selected tones. Simulation results show that the proposed scheme significantly reduces the complexity of the original TI, while maintaining the PAPR reduction performance.

Novel RAPF scheme and its performance of PAPR reduction and BER in FBMC‐OQAM system

“…However, similar to the orthogonal frequency division multiplexing (OFDM) system, it is possible to produce a high peak power at a certain time because of the superposition of the output signals at the transmitter. So far, according to the characteristic of the FBMC-OQAM system or PAPR reduction method of the OFDM system [3,4], the authors in [5,6] can effectively reduce PAPR of the FBMC-OQAM system. For example, the partial transmit sequences (PTS) based approach of the FBMC-OQAM system was studied in [5].…”

Performance Improvement for PAPR Reduction in LTE Downlink System with Elliptic Filtering

“…A system trade-off is definitely needed. Methods as peak windowing, peak cancellation, peak reduction carrier(PRC),envelope scaling, amplitude clipping and filtering, decision-aided reconstruction, coding, partial transmit sequence (PTS), selective mapping (SLM) [4], clustered OFDM, interleaving, tone reservation (TR), active constellation extension (ACE), pilot symbol assisted modulation, companding technique (CT) [5] , tone injection (TI) [6] have been presented earlier [7]. In case of applying the partial transmit sequence (PTS) [8] and selected mapping (SLM) [9][10] procedure, these two have more complexity than that of ACF technique.…”

“…If another technique named Tone Reservation (TR) is considered, it also allows the data rate loss along with power increasing. As well as the techniques such as Active Constellation Extension (ACE) and the Tone Injection (TI) [6] having criteria of increasing power will be unexpected in case of power constraint situation. A special technique described in [1] can be used to avoid this issue.…”