An evaluation of hybrid tone reservation method for PAPR reduction using power amplifier with memory effects

Abstract

International audienceA new technique known as Hybrid Tone Reservation (HTR) for Peak-to-Average Power Ratio (PAPR) reduction in OFDM systems has been proposed. It is shown that this new technique, based on the inclusion of the Guard Interval (GI) signal into the well-known Tone Reservation using Null-Subcarriers (TRNS) technique can significantly increase the PAPR reduction gain. In this paper, we propose to extend the performance evaluation of the HTR technique over Additive White Gaussian Noise (AWGN) channels in presence of a RF Power Amplifier (PA) model with memory effects. Simulation were carried out under the IEEE 802.11a standard in presence of a commercial 2W class-AB PA from RF Micro Devices. The model parameters of the considered PA were estimated by an experimental based method. The evaluation results in terms of Bit Error Rate (BER), Error Vector Magnitude (EVM) an spectral regrowth show that this new technique allows using the PA at high output level and consequently high power efficiency, while maintaining a good transmission quality compared to the classical TRNS method. These results highlight the performances of this technique in presence of PA nonlinearity

Shaping Code in Conjunction with DCT for PAPR Reduction in Multicarrier System

“…( 9), EVM and BER curves versus IBO with a noisy channel of SNR=12 dB are shown in Figs. (12,13), using DCT only (red curve), shaping technique only (black curve) and the proposed method (green curve). Figs.…”

“…Figs. (12,13) show that using only the DCT technique gives an insufficient improvement to the system in the linear region (IBO > 0 dB), while the shaping only allows an improvement of about 4% of EVM and more than one decade of BER in this region. In the nonlinear region (IBO < 0 dB), shaping still gives better results than the DCT except at high saturation (IBO= −4 dB), where the results are substantially similar.…”

“…Various techniques have been proposed in the literature to mitigate the effect of this problem. Among them, we can cite methods like clipping, clipping and filtering [4][5] [6], Active Constellation Extension (ACE) [8] [9], Tone Reservation (TR) [6] [7][10] [11] [12] [13], Selected Mapping (SLM) [14] [15], switching [16], coding methods [17] [18], Partial Transmit Sequence (PTS) [9][19] [20], interleaving [21] [22], and Discrete Cosine Transform (DCT) [23][24] [25]. Those techniques can be classified into three classes [26]: coding techniques, adding signal techniques, and probabilistic techniques.…”

Shaping Code in Conjunction with DCT for PAPR Reduction in Multicarrier System

“…Various techniques have been proposed in the literature to mitigate the effect of this problem. Among them, we can cite methods like Clipping, Clipping and filtering [4][5] [6], Active Constellation Extension (ACE) [7] [8], Tone Reservation (TR) [6][9] [10] [11] [12], Selected Mapping (SLM) [13] [14], Switching [15], Coding methods [16], Partial Transmit Sequence (PTS) [8] [17] [18], Interleaving [19] [20] and Discrete Cosine Transform (DCT) [21] [22] [23] [24]. Those techniques can be classified into 3 types [25]: the adding signal techniques, the probabilistic techniques and the coding techniques.…”