基于CAZAC序列的低复杂度抗频偏同步算法

doi:10.11959/j.issn.1000-436x.2021038

Abstract

Abstract:

A low-complexity and frequency-offset-robust synchronization algorithm based on CAZAC sequence was proposed, which was suitable for burst OFDM systems.A new preamble sequence was constructed based on the CAZAC sequence, and its simplified timing metric function was derived by using the combination characteristics of the sequence, and then the delay correlation and symmetric correlation characteristics were used to achieve accurate and stable timing synchronization.Furthermore, based on the new constructed preamble sequence, a weighted frequency synchronization scheme combining cyclic prefix was proposed to obtain more accurate frequency offset estimation.Simulation results show that the proposed algorithm has good synchronization performance in both Gaussian channels and multipath fading channels regardless of frequency offset, and its computational complexity is lower than the most existing representative algorithms.

Key words: OFDM, CAZAC sequence, preamble sequence, synchronization, frequency-offset-robust

CLC Number:

TN929.5

Fengkui GONG, Ni WEN, Guo LI, Yang GAO. Low-complexity and frequency-offset-robust synchronization algorithm based on CAZAC sequence[J]. Journal on Communications, 2021, 42(2): 64-71.

Figures/Tables 10

算法	P(d)		R(d)		总的复数乘法	总的加法
算法	复数乘法/次	加法/次	复数乘法/次	加法/次	总的复数乘法	总的加法
Minn算法	$\frac{N}{2}$	$\frac{N}{2} - 1$	$\frac{N}{2}$	$\frac{N}{2} - 1$	N	$\frac{N}{2}$
Park算法	$\frac{N}{2} + 1$	$\frac{N}{2}$	$\frac{N}{2} + 1$	$\frac{N}{2}$	N+2	N
Yang算法	N	N-2	2N+2	2N-2	3N+2	3N-4
Fang算法	N	$\frac{N}{2} - 1$	N+1	N-1	2N+1	$\frac{3 N}{2} - 2$
Shao算法	N	$\frac{N}{2} - 1$	N+1	N-1	2N+1	$\frac{3 N}{2} - 2$
Jian算法	$\frac{N}{2} + 1$	$\frac{N}{2} - 2$	$\frac{N}{2} + 2$	$\frac{N}{2} - 1$	N+3	N-3
所提算法	$\frac{N}{2} + 1$	$\frac{N}{2} - 2$	$\frac{N}{2} + 1$	$\frac{N}{2} - 2$	N+2	N-4

References 16

[1]	STEFAN P , ERICH Z , MARKUS R . Low complexity estimation of frequency selective channels for the LTE-A uplink[J]. IEEE Wireless Communications Letters, 2015,4(6): 673-676.
[2]	CARLOS B B , TANELI R , MATIAS T ,et al. Full-duplex OFDM radar with LTE and 5G NR waveforms:challenges,solutions and measurements[J]. IEEE Transactions on Microwave Theory and Techniques, 2019,67(10): 4042-4054.
[3]	唐杰, 王芳, 李明齐 . DVB-T2 系统基于前导符号的同步算法[J]. 通信学报, 2017,38(8): 94-100.
	TANG J , WANG F , LI M Q . Synchronization based on preamble symbol for DVB-T2 system[J]. Journal on Communications, 2017,38(8): 94-100.
[4]	PENG D , WU Y . The performance evaluation of the IEEE802.11ac uplink MU-MIMO systems[C]// IEEE International Conference on Integrated Circuits and Microsystems. Piscataway:IEEE Press, 2017: 282-285.
[5]	SPETH M , FECHTEL S , FOCK G ,et al. Optimum receiver design for wireless broad-band systems using OFDM part I[J]. IEEE Transactions on Communications, 1999,47(11): 1668-1677.
[6]	BEEK J V D , SANDELL M , BORJESSON P O . ML estimation of time and frequency offset in OFDM systems[J]. IEEE Transactions on Signal Processing, 1997,45(7): 1800-1805.
[7]	SCHMIDL T M , COX D C . Robust frequency and timing synchronization for OFDM[J]. IEEE Transactions on Communications, 1997,45(12): 1613-1621.
[8]	MINN H , ZENG M , BHARGAVA V K . On timing offset estimation for OFDM systems[J]. IEEE Communications Letters, 2000,4(7): 242-244.
[9]	PARK B , CHEON H , KANG C ,et al. A novel timing estimation method for OFDM systems[J]. IEEE Communications Letters, 2003,7(5): 53-55.
[10]	YANG F , ZHANG X . An efficient symbol timing scheme for OFDM systems using optimal correlation-based circular-shifted preamble[J]. IEEE Wireless Communications Letters, 2019:doi.org/10.1109/LWC.2019.2944154.
[11]	FANG Y , ZHANG Z , LIU G . A novel synchronization algorithm based on CAZAC sequence for OFDM systems[C]// IEEE International Conference on Wireless Networks and Mobile Communications. Piscataway:IEEE Press, 2012: 1-4.
[12]	SHAO H , LI Y , TAN J ,et al. Robust timing and frequency synchronization based on constant amplitude zero autocorrelation sequence for OFDM systems[C]// IEEE International Conference on Communication Problem-solving. Piscataway:IEEE Press, 2014: 14-17.
[13]	JIAN D H , WU H X , GAO W ,et al. A novel timing synchronization method based on CAZAC sequence for OFDM systems[C]// IEEE International Conference on Signal Processing,Communications and Computing. Piscataway:IEEE Press, 2018: 10-15.
[14]	ZHANG H Y , HOU Y H , CHEN Y F ,et al. Analysis of simplified frame synchronization scheme for burst-mode multi-carrier system[J]. IEEE Communications Letters, 2019,23(6): 1054-1056.
[15]	CHANG K , LEE S . Robust OFDM-based synchronization against very high fractional CFO and time-varying fading[J]. IEEE Systems Journal, 2020,14(3): 4047-4058.
[16]	BYOUNG H K , DEOK S K , CHEOL S K . Effects of smart antenna in wideband multipath channel[C]// IEEE International Conference on ATM. Piscataway:IEEE Press, 2001: 200-203.

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算法	抗干扰能力	抗频偏能力	抗多径能力	计算复杂度
Minn算法	弱	不敏感	弱	低
Park算法	较强	不敏感	较弱	低
Yang算法	弱	不敏感	强	高
Fang算法	强	不敏感	强	高
Shao算法	强	不敏感	强	高
Jian算法	强	敏感	较弱	低
所提算法	强	不敏感	强	低

Low-complexity and frequency-offset-robust synchronization algorithm based on CAZAC sequence

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