On the PAPR reduction technique: WP-PTS scheme with embedding the Side Information data

Abstract

The Partial Transmit Sequence (PTS) scheme is magnificent in reducing the high peak-to-average power ratio (PAPR) in multicarrier modulation (MCM) signals. However, the scheme produces Side Information (SI) data as the result of optimization which reduces the high PAPR of the signals. The SI data must be transmitted along with the optimized information data over the channel. Due to this, we develop a design of embedding the SI data into the Wavelet Packet-based OFDM (WP-OFDM) frame and able to reconstruct the original information by utilizing a simple reconstruction technique at the receiver. This paper presents single main contributions: The Wavelet Packet-based PTS (WP-PTS) scheme with a unique approach of managing the SI data. The WP-PTS scheme is the combination of WP-OFDM system and conventional PTS scheme. In fact, WP-PTS scheme has similar structure as conventional PTS scheme except different signal transformation block is utilized. The PAPR performance of embedding SI data using WP-PTS scheme is compared with WP-PTS scheme under similar conditions. A PAPR profile of uncoded WP-OFDM signal is also included. Results show that the PAPR profile of WP-PTS scheme with embedding SI data has converged towards PAPR profile of WP-PTS scheme. The WP-PTS scheme with embedding SI data obtained 3.0dB improvement if compared to uncoded signal at 10-4 of CCDF level with small lost in BER performance.