Performance analysis of the effects caused by HPA models on an OFDM signal with high PAPR

Paredes, Martha Cecilia Paredes; Grijalva, Felipe; Carvajal-Rodríguez, Jorge; Sarzosa, Franklin

doi:10.1109/etcm.2017.8247511

Cited by 18 publications

(20 citation statements)

References 11 publications

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“…SSPA is known as one of the most widely used types of nonlinear HPAs . However, due to its nonlinear characteristic, during the amplification process, the signals possessing high PAPR values are exposed to distortions which result in spectral regrowth at the same time.…”

Section: Sspa For Signal Amplificationmentioning

confidence: 99%

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Dual symbol optimization‐based partial transmit sequence technique for PAPR reduction in WOLA‐OFDM waveform

Taşpınar

Şimşir

2019

Int J Communication

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Weighted overlap and add-orthogonal frequency division multiplexing (WOLA-OFDM) is a new waveform proposed recently for meeting the requirements of fifth generation (5G) telecommunication standards. In spite of being a serious 5G waveform candidate, WOLA-OFDM is exposed to the problem of high peak to average power ratio (PAPR) similar to the other waveforms in which multicarrier transmission strategy is employed. Due to the overlapping nature of WOLA-OFDM waveform, where the extension of the current symbol is overlapped with the extension of the previous symbol, it will not be efficient to apply conventional PTS (C-PTS) directly to the WOLA-OFDM waveform. Therefore, in this paper, we propose dual symbol optimization-based partial transmit sequence (DSO-PTS) technique for PAPR reduction in WOLA-OFDM waveform. In our proposed technique, two adjacent symbols are jointly considered when searching for the optimal data block with minimum PAPR unlike the C-PTS where the adjacent symbols are optimized individually. In the simulations, our proposed DSO-PTS technique, C-PTS, and GreenOFDM that is developed recently by modifying the conventional selective mapping (SLM) method are compared with each other with regard to PAPR reduction performance for different search numbers (SNs). In addition, the effects of DSO-PTS, C-PTS, and GreenOFDM on the amount of out of band (OOB) radiation in the power spectral density (PSD) graph of WOLA-OFDM employing solid state power amplifier (SSPA) is measured for different SNs and input back off (IBO) values. According to the simulation results, our proposed DSO-PTS technique clearly demonstrates a superior PAPR reduction and PSD performance.

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Section: Sspa For Signal Amplificationmentioning

confidence: 99%

“…On the other hand, too much increase in the IBO gives rise to power inefficiency. Amplitude/amplitude (AM/AM) characteristic of a linear HPA is explained visually in Figure …”

Section: Sspa For Signal Amplificationmentioning

confidence: 99%

Dual symbol optimization‐based partial transmit sequence technique for PAPR reduction in WOLA‐OFDM waveform

Taşpınar

Şimşir

2019

Int J Communication

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“…For the present work the Rapp model was used, which simulates a Solid-State Power Amplifier (SSPA) that produces a smooth transition from the envelope modulation to the saturation level [5].…”

Section: High Power Amplifiermentioning

confidence: 99%

“…The greatest limitation when transmitting with an OFDM system occurs when there are too high-power peaks with respect to the average power in the transmission, which leads to large fluctuations in the OFDM signal. These peaks are formed when subcarriers with the same phase add up in a certain time and therefore there is degradation in the signal, especially when the signal passes through a non-linear amplifier for example HPA [5]. This limitation is known as Peak-to-average power ratio (PAPR).…”

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Analysis of the PAPR Behavior of the OFDM Passband Signal

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T³

et al. 2019

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Orthogonal Frequency Division Multiplexing (OFDM) is a technique widely used in today's wireless communication systems due to its ability to combat the effects of multi-path in the signal. However, one of the main limitations of the use of OFDM is its high Peak-to-Average Power Ratio (PAPR), which reduces the efficiency of the OFDM system. The effects of PAPR can produce both out-of-band and in-band radiation, which degrades the signal by increasing the bit error rate (BER), this occurs in both baseband and bandpass sginals. In this document the effect of the PAPR in a OFDM passband signal is analyzed considering the implementation of a High Power Amplifier (HPA) and the Simple Amplitude Predistortion-Orthogonal Pilot Sequences (OPS-SAP) scheme to reduce the PAPR.

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A novel discrete cuckoo search algorithm‐based selective mapping technique to minimize the peak‐to‐average power ratio of universal filtered multicarrier signal

Şimşir

Taşpınar

2020

Int J Communication

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SummaryThe universal filtered multicarrier (UFMC), which has emerged as a product of the intensive studies carried out for developing alternative waveforms compatible with the oncoming fifth generation (5G) technology, has rapidly become one of the few waveforms considered seriously to be utilized in the next generation telecommunication systems due to its exclusive features. However, high peak‐to‐average power ratio (PAPR) problem specific to the multicarrier waveforms is waiting for researchers as the primary issue to be tackled in the UFMC waveform. To address this issue, an efficient PAPR reduction scheme called discrete cuckoo search algorithm‐based selective mapping (DCS‐SLM) is suggested in this paper. While creating the proposed DCS‐SLM scheme, in order to make the original CS algorithm suitable to be integrated into the conventional SLM method, a novel DCS algorithm was developed. Thanks to the related DCS algorithm, it becomes possible in the SLM technique to perform phase sequence optimization, which is a combinatorial optimization process that can be carried out in discrete space. It is clearly observed from the simulation results that the integration of our novel DCS algorithm to create a new PAPR reduction technique called DCS‐SLM leads to a remarkable performance improvement in the conventional SLM method due to the DCS‐based phase optimization through which the PAPR of UFMC signals are reduced to minimum levels.

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Performance analysis of the effects caused by HPA models on an OFDM signal with high PAPR

Cited by 18 publications

References 11 publications

Dual symbol optimization‐based partial transmit sequence technique for PAPR reduction in WOLA‐OFDM waveform

Dual symbol optimization‐based partial transmit sequence technique for PAPR reduction in WOLA‐OFDM waveform

Analysis of the PAPR Behavior of the OFDM Passband Signal

A novel discrete cuckoo search algorithm‐based selective mapping technique to minimize the peak‐to‐average power ratio of universal filtered multicarrier signal

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