Pseudo-noise preamble based joint frame and frequency synchronization algorithm in OFDM communication systems

Jing, Qiangshan; Cheng, Ming; Lu, Yuping; Zhong, Weizhi; Yao, Hongwei

doi:10.1109/jsee.2014.00001

Cited by 15 publications

(7 citation statements)

References 13 publications

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“…In the past few years, most researchers focus on the synchronization method of inserting synchronization sequences. In [11] and [12], a frame synchronization method was discussed by using the preamble sequence with good autocorrelation characteristics. In [13], based on pseudo-noise code, a frame synchronization method with low cost and low resource consumption has been proposed.…”

Section: A Literature Reviewmentioning

confidence: 99%

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A Spectrum Efficient Constellation to Simultaneously Transmit Information and Synchronization Sequence

Yao

Yuan

et al. 2020

IEEE Access

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In this paper, a new type of quadrature phase shift keying (QPSK) modulation, named as special QPSK (SQPSK), is proposed and optimized. For SQPSK, the quadrant of the symbol is determined by the bits in information sequence according to QPSK constellation, while the offset relative to the original QPSK constellation is controlled by the bits in synchronization sequence. Under this scheme, the simultaneous transmission of information and synchronization sequences is implemented to improve spectrum efficiency with low computational complexity. In order to achieve the best balance beteween the bit error rate (BER) and the synchronization performance, we optimize the parameter design. Furthermore, a joint synchronization scheme is proposed for frame synchronization, frequency offset estimation, and frequency offset compensation to solve the performance loss caused by Doppler frequency shift in practical applications. Then based on the characteristics of the constellation map, a dynamic threshold demodulation scheme which further improves the BER performance is discussed. Finally, some simulation results are given to show that the SQPSK not only has both good error performance and acquisition performance, but also improves the spectrum utilization of channel resource significantly. INDEX TERMS Bit error rate (BER), Doppler shift, frame synchronization, quadrature phase shift keying (QPSK).

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Section: A Literature Reviewmentioning

confidence: 99%

“…Compared the BER performance of SQPSK with dynamic threshold and traditional method. The BER of SQPSK with traditional method (V d = 0) is given in (12). Due to erfc(x) is a convex function and a = a 1 +a 2 2 , it is easy to learn that…”

mentioning

confidence: 99%

A Spectrum Efficient Constellation to Simultaneously Transmit Information and Synchronization Sequence

Yao

Yuan

et al. 2020

IEEE Access

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“…However, neither [21] nor [23] has taken the effect of CFO into account. But the fact is that the autocorrelation performance of PN sequence decreases sharply over CFO environment [24]. Consequently, the PCS could not be obtained and the CSbased channel estimation is out of effect.…”

Section: Background Knowledgementioning

confidence: 99%

Sparse massive MIMO-OFDM channel estimation based on compressed sensing over frequency offset environment

et al. 2019

EURASIP J. Adv. Signal Process.

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In massive MIMO-OFDM systems, channel estimation is a significant module which can be utilized to eliminate multipath interference. However, in realistic communication systems, carrier frequency offset (CFO), which often exists in receive end, will deteriorate the performance of channel estimation. One of the effective solutions is to compensate CFO via the help of pseudo-noise (PN) sequence. At the beginning of this paper, to reduce system complexity and correctly compensate CFO, we propose an improved OFDM frame structure. Subsequently, we theoretically analyze the catastrophic influence of CFO on conventional PN-sequence-based compressed sensing (CS) channel estimation scheme. As our solution, based on the improved OFDM frame structure, a novel massive MIMO-OFDM channel estimation method under CFO environment is proposed. It first estimates CFO by utilizing differential correlation algorithm. Thereby, the interference caused by CFO can be eliminated. Then, relying on the PN sequence, the partial common support (PCS) information of each channel is obtained. Finally, using the PCS information as a priori information, we improve the CS reconstruction scheme to estimate the accurate channel. The simulation result shows that the proposed scheme demonstrates better MSE and BER performance than other mentioned schemes. The major advantage of our scheme is its anti-CFO ability and independence to channel sparsity level. Therefore, the proposed scheme is meaningful for practical use.

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“…Due to this, the subcarriers are overlapped which helps in increasing spectral efficiency (Dou et al 2014). Generally, the overlapping of adjacent channels can interfere with one another and causes inter carrier interference (ICI) (Jing et al 2014). However, sub carriers in OFDM had made orthogonal to each other very preciously (Jian et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of FrFT based OFDM system with 1024-PSK and 1024-QAM modulation under various wireless fading channels

Kansal

Singh

Saxena

2014

Int J Syst Assur Eng Manag

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The problem of scarcity of spectrum had dealt with in this paper; by proposing an FrFT based OFDM system. The performance of system is measured at various values of a, where a is the fractional Fourier transform parameter. The proposed system with 1024-PSK modulation technique as compared to FFT based OFDM system, had achieved BER of 10 -1.8 at 53 dB SNR against 10 -0.4 BER under AWGN channel, 10 -2.5 and 10 -2.4 BER at 62 and 60 dB SNR respectively for Rayleigh and Rician channel respectively at a = 0.4 for AWGN and Rayleigh channel where as a = 0.2 for Rician channel. For Nakagami channel proposed system had achieved BER of 10 -3.0 at 60 dB SNR as compared to 10 -0.9 for same SNR at a = 0.9. With 1024-QAM modulation the proposed system had achieved BER of 10 -2.9 at 14 dB SNR as compared to 10 -0.5 for a = 0.9 under Rayleigh channel. For Rician and Nakagami channels the proposed system achieved BER of 10 -1.9 and 10 -3.0 at 10 and 14 dB SNR respectively as compared to BER of 10 -0.4 for same SNR by FFT based system for a = 0.7 and a = 0.3 for Rican and Nakagami channel respectively.

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Pseudo-noise preamble based joint frame and frequency synchronization algorithm in OFDM communication systems

Cited by 15 publications

References 13 publications

A Spectrum Efficient Constellation to Simultaneously Transmit Information and Synchronization Sequence

A Spectrum Efficient Constellation to Simultaneously Transmit Information and Synchronization Sequence

Sparse massive MIMO-OFDM channel estimation based on compressed sensing over frequency offset environment

Performance analysis of FrFT based OFDM system with 1024-PSK and 1024-QAM modulation under various wireless fading channels

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