Enhanced PAPR in OFDM without Deteriorating BER Performance

Chronopoulos, Spyridon K.; Tatsis, Giorgos; Raptis, Vasilis; Kostarakis, P.

doi:10.4236/ijcns.2011.43020

Cited by 20 publications

(20 citation statements)

References 8 publications

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“…When the timing error caused by the frequency offset is small (for the device with an expensive crystal oscillator), it needs to search just one of the PSS signals rather than two for the purpose of a quick search, low complexity, and compatibility. In addition, it can maintain the peak-to-average power ratio (PAPR) property of the original sequence

x false[n false]

without the need of PAPR reduction techniques [12,13,14,15]. …”

Section: Conjugated-sequences-based Timing Structurementioning

confidence: 99%

Frequency Offset Tolerant Synchronization Signal Design in NB-IoT

Zou

2018

Sensors

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Timing detection is the first step and very important in wireless communication systems. Timing detection performance is usually affected by the frequency offset. Therefore, it is a challenge to design the synchronization signal in massive narrowband Internet of Things (NB-IoT) scenarios where the frequency offset is usually large due to the low cost requirement. In this paper, we firstly proposed a new general synchronization signal structure with a couple of sequences which are conjugated to remove the potential timing error that arises from large frequency offset. Then, we analyze the suitable sequence for our proposed synchronization signal structure and discuss a Zadoff–Chu (ZC) sequence with root 1 as an example. Finally, the simulation results demonstrate that our proposed synchronization signal can work well when the frequency offset is large. It means that our proposed synchronization signal design is very suitable for the massive NB-IoT.

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x false[n false]

without the need of PAPR reduction techniques [12,13,14,15]. …”

Section: Conjugated-sequences-based Timing Structurementioning

confidence: 99%

Frequency Offset Tolerant Synchronization Signal Design in NB-IoT

Zou

2018

Sensors

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“…So, we concluded to design a system, which works well even under the use of a restricted number of feedbacks. The new PCCC scheme was designed for being part of an OFDM system with enhanced features [5,14]. Also, implementation in a DSP could be possible [15] along with other areas of applications such as fading channels and others [2].…”

Section: Conclusion-future Scopesmentioning

confidence: 99%

Turbo Codes―A New PCCC Design

Chronopoulos¹,

Tatsis²,

Kostarakis³

2011

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Coding techniques have always been a major area of scientific interest. Due to this interest, many coding schemes were invented. Eventually, their implementation in various systems contributed in the evolvement of Wireless Communications. A breakthrough was definitely Turbo coding. Particularly, the concept of joining two or more convolutional encoders in parallel (PCCC) or in serial (SCCC), along with the iterative decoding technique, literally raised the expectations of the anticipated BER performance. In fact, Concatenated Convolutional Codes clearly outperform convolutional codes. Moreover, various systems, either under development or either for future use, will have high standards. The previous systems should present exceptional tolerance of noise effects and consequently a low overall number of received errors. For this purpose a new PCCC design was developed. The system's performance analysis, using an AWGN channel, showed better results for various iterations compared to other schemes such as typical PCCC, SCCC and finally a Convolutional encoder with a Viterbi decoder.

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“…However, the peak-to-average power ratio (PAPR) of traditional OFDM signals can be bigger than 7 dB, which is a rough index for the high power amplifier (HPA). In radio frequency front end, the efficiency of HPA is degenerated with increasing PAPR of input signals [11][12][13]. The high PAPR value of OFDM signals will lead to the serious nonlinear distortion of HPAs [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Constant envelope OFDM RadCom fusion system

Huang

et al. 2018

J Wireless Com Network

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A joint radar and wireless communication (RadCom) fusion system is an important trend for future intelligent transportation, such as the Internet of Vehicles (IOV). However, traditional joint orthogonal frequency division multiplexing (OFDM)-based RadCom fusion system suffers from the problem of high peak-to-average power ratio (PAPR) of transmission signals, leading to nonlinear distortion in high power amplifiers (HPAs). To solve this problem, a new constant envelope OFDM RadCom approach is proposed in this paper. Taking phase modulation into consideration, the constant envelope OFDM RadCom system obtains 0 dB PAPR value, which results in linear high power amplifier being feasible. In the receiver side, both communication transmission and target detection are guaranteed by a phase demodulator and frequency-domain signal processing algorithm, respectively. Simulation results demonstrate that the constant envelope OFDM RadCom system is a feasible solution for future IOV with the capability of target detection and wireless communication simultaneously.

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Enhanced PAPR in OFDM without Deteriorating BER Performance

Cited by 20 publications

References 8 publications

Frequency Offset Tolerant Synchronization Signal Design in NB-IoT

Frequency Offset Tolerant Synchronization Signal Design in NB-IoT

Turbo Codes―A New PCCC Design

Constant envelope OFDM RadCom fusion system

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