PAPR reduction scheme: wavelet packet‐based PTS with embedded side information data scheme

Abstract

Partial transmit sequence (PTS) is an effective scheme to reduce high peak-to-average power ratio (PAPR) for multicarrier modulation (MCM) signal transmission systems. This approach produces side information (SI) data as a result of the MCM signal optimisation process. The generated SI data are required to be transmitted with the original data over the channel for successful data recovery at the receiver. An effective method for SI data transmission has not yet been identified and research is still ongoing. Hence, the authors introduce a technique that embeds SI data into the original data frame. In this study, a wavelet packet (WP)-based PTS (WP-PTS) scheme is selected as the MCM transmission method. The proposed scheme is called WP-PTS with embedded SI data. In addition, a suitable scheme for reconstructing the original data is developed. Simulation result shows that the PAPR performance of the proposed scheme improves by up to 2.5 dB at a complementary cumulative distribution function level of 10 −4 compared with the original WP-orthogonal frequency-division multiplexing system without the PAPR reduction scheme when the number of selected disjoint subblocks is 16.

BER Performance Investigation of WPM with Unknown CSI Using Time-Domain MMSE Equalization

“…On the other hand, if the CSI is known, equalizer coefficients can be derived based on [20] as given by Eq. (11). This eliminates the need of a training sequence.…”

“…High signal PAPRs are considered as a drawback of MCM. Despite a lot of studies on PAPR reduction for OFDM, there is limited literature on PAPR reduction for WPM [6,[8][9][10][11]. The impact of different wavelet families, wavelet filters, and wavelet filter lengths is studied in [6].…”

“…This method results in PAPR reduction of more than 1 dB. The PTS approach with embedded side information (ESI) to the transmit frame is proposed in [11]. This approach reduces the PAPR by 2.5 dB.…”

Peak-to-average power ratio reduction in wavelet packet modulation Using Binary Phase Sequence.

“…Suma et al, have improved PAPR reduction in OFDM by best tree selection using coded discrete cosine harmonic wavelet packet transform [22]. Zakaria, has proposed embedding side information data which has proved to have better bit error ratio (BER) as compared to other renowned schemes [23].…”

Blind Selected Mapping with Side Information Estimation Based on the Received Pilot Signal

“…When the signal with high PAPR passes nonlinear devices such as digital-to-analog converter and high power amplifier, the problems of quantization noise, in-band signal distortion, and out-of-band radiation can be severely aggravated [3,4]. Therefore, various PAPR reduction schemes have been proposed (e.g., [5][6][7][8][9][10][11][12][13][14][15][16][17]). Selected mapping (SLM) introduced in [18] has been known as an efficient PAPR reduction technique with low implementation complexity.…”