基于NIC与Givens旋转的DS-CDMA信号伪码估计

doi:10.12305/j.issn.1001-506X.2025.07.32

系统工程与电子技术 ›› 2025, Vol. 47 ›› Issue (7): 2399-2405.doi: 10.12305/j.issn.1001-506X.2025.07.32

• 通信与网络 • 上一篇

基于NIC与Givens旋转的DS-CDMA信号伪码估计

张天骐, 吴仙越, 李春运, 唐娟

重庆邮电大学通信与信息工程学院, 重庆 400065

收稿日期:2024-08-05 出版日期:2025-07-16 发布日期:2025-07-22
通讯作者: 吴仙越
作者简介:张天骐 (1971—), 男, 教授, 博士研究生导师, 博士, 主要研究方向为通信信号的调制解调、盲处理、语音信号处理、神经网络实现、现场可编程逻辑门阵列、超大规模集成实现
吴仙越 (2000—), 女, 硕士研究生, 主要研究方向为扩频信号盲估计
李春运 (2000—), 男, 硕士研究生, 主要研究方向为信道编码参数盲识别
唐娟 (2000—), 女, 硕士研究生, 主要研究方向为卫星扩频信号捕获
基金资助:
重庆市自然基金(cstc2021jcyj-msxmX0836)

Pseudo-code estimation of DS-CDMA signals based on NIC and Givens rotation

Tianqi ZHANG, Xianyue WU, Chunyun LI, Juan TANG

School of Communications and Information Engineering, Chongqing University of Postsand Telecommunications, Chongqing 400065, China

Received:2024-08-05 Online:2025-07-16 Published:2025-07-22
Contact: Xianyue WU

摘要/Abstract

摘要：

针对直接扩频序列码分多址(direct sequence code division multiple access, DS-CDMA)信号伪码估计问题, 在已知DS-CDMA信号参数的条件下, 提出一种基于新信息准则(novel information criterion, NIC)与Givens旋转的多伪码盲估计方法。该方法通过对观测数据按照一倍的伪码周期进行不重叠分段构造数据矩阵。利用NIC获得数据矩阵主子空间, 并利用Givens旋转提取信号主成分, 再通过梅西算法恢复多用户生成多项式, 从而实现多用户伪码盲估计。仿真实验表明, 该算法较特征值分解算法抗噪性能提高了3 dB, 且在信号数据量较少时也能实现较优估计。

关键词: 直接扩频序列码分多址, 伪码估计, 主子空间分析, Givens旋转, 梅西算法

Abstract:

In addressing the issue of pseudo-code estimation for direct sequence code division multiple access (DS-CDMA) signals, an estimation method based on novel information criterion (NIC) and Givens rotation, is proposed, under the assumption of known DS-CDMA signal parameters. This method constructs a data matrix by segmenting the observed data into non-overlapping segments, corresponding to one pseudo-code period. The NIC is employed to identify the principal subspace within the data matrix, while Givens rotation is used to extract the signal principal components. Finally, the Massey algorithm is used to recover the multi-user generating polynomials. Simulation experiments demonstrate that the algorithm provides a 3 dB improvement in noise robustness compared to eigenvalue decomposition. It also maintains high estimation accuracy, even with limited signal data volume.

Key words: direct sequence code division multiple access (DS-CDMA), pseudo-code estimation, principal subspace analysis, Givens rotation, Massey algorithm

中图分类号:

TN911.7

张天骐, 吴仙越, 李春运, 唐娟. 基于NIC与Givens旋转的DS-CDMA信号伪码估计[J]. 系统工程与电子技术, 2025, 47(7): 2399-2405.

Tianqi ZHANG, Xianyue WU, Chunyun LI, Juan TANG. Pseudo-code estimation of DS-CDMA signals based on NIC and Givens rotation[J]. Systems Engineering and Electronics, 2025, 47(7): 2399-2405.

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参考文献 21

1	ANJUM I , SYED A A , RIZVI A A . Independent code division multiple access in DS-CDMA[J]. Wireless Personal Communications, 2021, 117, 1717- 1733.
2	MENG E T , YU J H , JIN S , et al. Resource allocation for MC-DS-CDMA in Beam-Hopping LEO satellite networks[J]. IEEE Trans.on Aerospace and Electronic Systems, 2024, 60 (3): 3611- 3624.
3	张慧芝, 张天骐, 方蓉, 等. 基于SVD-K-means算法的软扩频信号伪码序列盲估计[J]. 系统工程与电子技术, 2024, 46 (1): 326- 333. doi: 10.12305/j.issn.1001-506X.2024.01.37
	ZHANG H Z , ZHANG T Q , FANG R , et al. Blind estimation of pseudo-code sequence of soft spread spectrum signal based on SVD-K-means algorithm[J]. Systems Engineering and Electronics, 2024, 46 (1): 326- 333. doi: 10.12305/j.issn.1001-506X.2024.01.37
4	解辉, 赵忠臣, 刘利民, 等. DS-CDMA下行链路多用户与扩频波形估计[J]. 现代电子技术, 2022, 45 (21): 1- 6.
	XIE H , ZHAO Z C , LIU L M , et al. Waveform estimation of multi-user and spread spectrum in DS-CDMA downlink[J]. Modern Electronics Technique, 2022, 45 (21): 1- 6.
5	王勃, 沈雷, 卢英俊. 非协作多用户短码直扩信号伪码估计[J]. 杭州电子科技大学学报(自然科学版), 2023, 43 (3): 9-15, 54.
	WANG B , SHEN L , LU Y J . Pseudo-code estimation of non-cooperative multi-user short code direct spread signal[J]. Journal of Hangzhou Dianzi University (Natural Sciences), 2023, 43 (3): 9-15, 54.
6	ALOFAISAN T S , IBRAHIM A B , ALHUSSEIN M , et al. PN code acquisition in DS-CDMA wireless systems using smart antenna and S-CFAR processor[J]. IEEE Access, 2022, 10, 6720- 6736.
7	YAO Y , POOR V . Eavesdropping in the synchronous CDMA channel: an EM-based approach[J]. IEEE Trans.on Signal Processing, 2001, 49 (8): 1748- 1756.
8	刘秋红, 许漫坤, 李天昀. 基于ML的多径信道下直扩信号PN码和信道的联合盲估计[J]. 电子学报, 2021, 49 (8): 1480- 1488.
	LIU Q H , XU M K , LI T Y . Joint blind estimation of PN codes and channels with maximum likelihood for DSSS signals in multipath channels[J]. Acta Electronica Sinica, 2021, 49 (8): 1480- 1488.
9	周杨, 张天骐. 同/异步短码DS-CDMA信号伪码序列及信息序列盲估计[J]. 电子与信息学报, 2019, 41 (7): 1540- 1547.
	ZHOU Y , ZHANG T Q . Blind estimation of the pseudo noise sequence and information sequence for short code synchronous and asynchronous DS-CDMA signal[J]. Journal of Electronics and Information Technology, 2019, 41 (7): 1540- 1547.
10	邱钊洋, 李天昀, 陈香名. 基于判决辅助的异步CDMA信号多伪码序列盲估计算法[J]. 通信学报, 2020, 41 (8): 66- 78.
	QIU Z Y , LI T Y , CHEN X M . Decision-aided-based multiple blind PN code estimation algorithm of asynchronous CDMA signal[J]. Journal on Communications, 2020, 41 (8): 66- 78.
11	赵军桃, 张天骐, 江晓磊, 等. 基于LEAP神经网络同步DS-CDMA伪码序列盲估计[J]. 计算机应用研究, 2017, 34 (2): 552- 556. doi: 10.3969/j.issn.1001-3695.2017.02.052
	ZHAO J T , ZHANG T Q , JIANG X L , et al. Blind estimate of PN sequence synchronous DS-CDMA based on LEAP neural network[J]. Application Research of Computers, 2017, 34 (2): 552- 556. doi: 10.3969/j.issn.1001-3695.2017.02.052
12	ZHANG T Q , QIAN W R , ZHANG G . Parameter estimation of MC-CDMA signals based on modified cyclic autocorrelation[J]. Digital Signal Processing, 2016, 54 (7): 46- 53.
13	金艳, 孙以玲, 姬红兵. 基于相关嫡的扩频周期估计方法[J]. 系统工程与电子技术, 2018, 40 (1): 17- 22. doi: 10.3969/j.issn.1001-506X.2018.01.03
	JIN Y , SUN Y L , JI H B . Spreading period estimation method based on correlation entropy[J]. Systems Engineering and Electronics, 2018, 40 (1): 17- 22. doi: 10.3969/j.issn.1001-506X.2018.01.03
14	LI X , WANG L Q , MUNOCHIVEYI M . Experimental verification of the modified PSA algorithm[J]. IEEE Access, 2022, 10, 80394- 80402.
15	孔祥玉, 冯晓伟, 胡昌华. 广义主成分分析算法及应用[M]. 北京: 国防工业出版社, 2018: 27- 28.
	KONG X Y , FENG X W , HU C H . General principal component analysis and application[M]. Beijing: National Defense Industry Press, 2018: 27- 28.
16	MIAO Y , HUA Y . Fast subspace tracking and neural network learning by a novel information criterion[J]. IEEE Trans.on Signal Processing, 1998, 64 (7): 1967- 1979.
17	BARTELMAOS S , ABED-MERAIM K . Fast principal component extraction using givens rotations[J]. IEEE Signal Processing Letters, 2008, 15, 369- 372.
18	SHI B B, OUYANG Y, HUANG L L. Anti-jamming method of sliding window QR decomposition based on hyperbolic givens rotation[C]//Proc. of the 2nd International Conference on Computing, Communication, Perception and Quantum Technology, 2023: 60-67.
19	MALIKA A , AMMAR M , KARIM A M , et al. Generalized unitary joint diagonalization algorithm based on approximate givens ro tations[J]. IEEE Signal Processing Letters, 2023, 31, 101- 105.
20	MASSEY J . Shift-register synthesis and BCH decoding[J]. IEEE Trans.on Information Theory, 1969, 15 (1): 122- 127.
21	林可祥, 汪一飞. 伪随机码的原理与应用[M]. 北京: 人民邮电出版社, 1978: 150- 167.
	LIN K X , WANG Y F . The principle and application of pseudo-random code[M]. Beijing: Posts & Telecom Press, 1978: 150- 167.

算法	复杂度
特征值分解法	O(N³+N²M)
本文算法	O(5RNM+2R²M+2RM)

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基于NIC与Givens旋转的DS-CDMA信号伪码估计

Pseudo-code estimation of DS-CDMA signals based on NIC and Givens rotation

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