PCMA系统中干扰信号的频偏与时延联合估计

doi:10.11959/j.issn.1000-436x.2017040

Abstract

Abstract:

For cooperative received high-order modulation PCMA (paired carrier multiple access) signals,joint estima-tion of frequency offset and time delay was proposed.The sequence samples stored locally were used as auxiliary data.Estimation of frequency offset and time delay was calculated by optimizing the objective function,which was obtained from the cross-correlation computation of the auxiliary data and mixed signal,and the optimized process was accom-plished by utilizing two-dimensional search.By setting the threshold of joint estimation,the calculated amount was greatly reduced.Modified Cramer-Rao bound (MCRB) of interference frequency offset and time delay was derived,which provided theoretical basis for performance of the proposed algorithm.Simulation results show that the algorithm has similar performance with existing algorithms,but its complexity is reduced by two-thirds.

Key words: PCMA,high-order modulation, frequency offset estimation, joint estimation, MCRB

CLC Number:

TN911.7

Xue-juan WEI,Yong YANG,Yi-ming GUO,Dong-ling ZHANG. Joint estimation of interference frequency offset and time delay in PCMA system[J]. Journal on Communications, 2017, 38(2): 173-182.

Figures/Tables 9

$\frac{E_{s}}{N_{0 \min}} / dB$	V_max
$\frac{E_{s}}{N_{0 \min}} / dB$	d=0.4	d=0.6	d=0.8	d=1.0
0	0.16	0.17	0.21	0.23
2.5	0.17	0.22	0.27	0.30
5.0	0.20	0.27	0.33	0.37
7.5	0.24	0.33	0.40	0.45
10.0	0.27	0.39	0.47	0.53
12.5	0.31	0.42	0.52	0.59
15.0	0.33	0.46	0.56	0.63

References 14

[1]	DANKBERG M , . Paired carrier multiple access (PCMA) for satellite communication[C]// Pacific Telecommunications Conference. 1998: 787-791.
[2]	MENGALI U , MORELLI M . Data-aided frequency estimation for burst digital transmission[J]. IEEE Transaction on Communications, 1997,45(1): 23-26.
[3]	纪健超, 王宇 . 应用于卫星通信的 DVB-S2载波同步算法研究[J]. 信息通信, 2011(4): 1-2.
	JI J C , WANG Y . Research on the algorithm of carrier synchronization used in satellite communication DVB-S2[J]. Information ＆ Communications, 2011(4): 1-2.
[4]	史治平, 唐发建, 晏辉 ,等. 极低信噪比下的导频联合编码辅助载波同步算法[J]. 电子与信息学报, 2011,33(10): 2506-2510.
	SHI Z P , TANG F J , YAN H ,et al. Joint assisted carrier synchronization algorithm by pilot and code at extremely low SNR[J]. Journal of Electronics ＆ Information Technology, 2011,33(10): 2506-2510.
[5]	MEIYAPPAN A , KAM P Y , KIM H . A complex-weighted,deci-sion-aided,maximum-likelihood carrier phase and frequency-offset estimation algorithm for coherent optical detection[J]. Optics Express, 2012,20(18): 20102-20114.
[6]	张冬玲, 张君, 欧阳喜 ,等. PCMA 系统相位调制信号的谱特征分析[J]. 信息工程大学学报, 2011,12(2): 184-220.
	ZHANG D L , ZHANG J , OUYANG X ,et al. Spectrum feature analysis for PCMA signals with phase modulation[J]. Journal of Information Engineering University, 2011,12(2): 184-220.
[7]	杨勇 . 成对载波多址信号的解调技术研究[D]. 郑州:解放军信息工程大学, 2013: 19-20.
	YANG Y . Research on demodulation techniques of paired carrier mul-tiple access signals[D]. Zhengzhou:PLA Information Engineering University, 2013: 19-20.
[8]	葛蕾 . PCMA信号分离解调技术研究[J]. 无线电工程, 2015,45(8): 39-42.
	GE L . Study on technology of separation and demodulation for PCMA signals[J]. Radio Engineering, 2015,45(8): 39-42.
[9]	杨勇, 张冬玲, 彭华 ,等. 单通道高阶调制线性混合信号的频偏估计[J]. 电子学报, 2015,43(1): 160-165.
	YANG Y , ZHANG D L , PENG H ,et al. Frequency offset estimation in single-channel linear mixture of high-order modulated signals[J]. Acta Electronica Sinica, 2015,43(1): 160-165.
[10]	邵力强 . 双载波多路技术中频率等参数的估计研究[D]. 成都:电子科技大学, 2006.
	SHAO L Q.Research on parameters estimation of frequency etc . for paired carrier multiple access technique[D]. Chengdu:University of Electronic Science and Technology, 2006.
[11]	沈逸峰, 汪春梅 . 试论成对载波多址系统中参数的联合估计[J]. 高新技术, 2013,4: 6-7.
	SHEN Y F , WANG C M . Test discussion on joint estimation of parameters in paired carrier multiple access system[J]. New Technologies, 2013,4: 6-7.
[12]	公博 . 卫星通信系统成对载波多址技术研究[D]. 哈尔滨:哈尔滨工业大学, 2010.
	GONG B . research on the paired carrier multiple access technique in satellite communication systems[D]. Harbin:Harbin Institute of Technology, 2010.
[13]	李天赐 . 基于 PCMA 的盲解调技术研究[D]. 上海:上海交通大学, 2014.
	LI T C . Research on blind demodulation of PCMA signals[D]. Shanghai:Shanghai Jiao Tong University, 2014
[14]	D'ANDREA A N , MENGALI U , REGGIANNINI R . The modified Cramer-Rao bound and its applications to synchronization problems[J]. IEEE Transaction on Communications, 1994,42: 1391-1399.

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频偏估计算法	参数条件	实数乘法次数	实数加法次数
本文算法	N=1 600,q=4,M=50	1 280 400	1 279 800
M＆M算法	N=1 600	3 848 796	3 842 398

Joint estimation of interference frequency offset and time delay in PCMA system

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