A low complexity selected mapping scheme for peak to average power ratio reduction with digital predistortion in OFDM systems

Abstract

One of the effective methods used for reducing peak-to-average power ratio (PAPR) in orthogonal frequency division multiplexing (OFDM) systems is selected mapping (SLM). In this paper, a new SLM scheme called DSI-SLM, which is a combination of dummy sequence insertion (DSI) and conventional selected mapping (C-SLM) is proposed. Previous techniques have had some drawbacks. In DSI, increasing the number of dummy sequences to have better PAPR degrades transmission efficiency, and in C-SLM, the complexity rises dramatically when the number of sub-blocks increases. The proposed DSI-SLM scheme significantly reduces the complexity because of the reduction in the number of sub-blocks compared with the C-SLM technique while its PAPR performance is even better. To enhance the efficiency of the OFDM system and suppress the out-of-band distortion from the power amplifier nonlinearity, a digital predistortion technique is applied to the DSI-SLM scheme. Simulations are carried out with the actual power amplifier model and the OFDM signal based on the worldwide interoperability for microwave access standard and quadrature phaseshift keying modulation. The simulation results show improvement in PAPR reduction and complexity, whereas the BER performance is slightly worse.

High performance 8 bit cascaded carry look ahead adder with precise power consumption

“…Very‐large‐scale integration circuits have been utilized widely in the field of electronics. Every development is focused on the performance evaluation and reduced power consumption in electronics and telecommunication . With the use of improved fundamental components in the cascaded design of 8 bit CLA, the power of 4 bit CLA has been reduced to 29% as compared with the data reported.…”

Efficiency analysis of PAPR reduction schemes

“…One of the recent methods for PAPR reduction is named DSI-SLM [15]. As shown in block diagram of Fig.…”

Peak‐to‐average power ratio reduction in space frequency block coding multi‐input multi‐output orthogonal frequency division multiplexing systems by tone reservation

“…3. M-TR SCHEME Various methods [9][10][11][12][13][14][15][16][17][18] have been proposed to reduce the PAPR of OFDM signals, among them, the TR method is an attractive one because it can achieve significant PAPR reduction without side information and signal distortion. In the TR method, transceiver agrees on reserving a small set of tones for generating peak reduction signals for PAPR reduction.…”