高动态环境下长码扩频信号快捕算法

刘晓明; 张鹤; 吴皓威; 欧静兰

doi:10.11999/JEIT150860

高动态环境下长码扩频信号快捕算法

doi: 10.11999/JEIT150860

1.
(重庆大学通信工程学院重庆 400044) ②(重庆大学通信与测控中心重庆 400044)

基金项目:

国家863计划(2015AA7072014C)，中央高校基本科研业务费资金(106112013CDJZR165502, 106112013CDJZR160013, 106112013CDJZR1160014)

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出版历程
- 收稿日期: 2015-07-20
- 修回日期: 2016-01-04
- 刊出日期: 2016-06-19

Rapid DSSS Signal Acquisition Algorithm under High Dynamic Environment

1.
(College of Communication Engineering, Chongqing University, Chongqing 400044, China)
2.
(Center of Communication and Tracking Telemetering &

Funds:

The National 863 Program of China (2015AA 7072014C), The Fundamental Research Funds for Central Universities (106112013CDJZR165502, 106112013CDJZR160013, 106112013 CDJZR1160014)

摘要

摘要: 针对高速高动态接收机在长伪码周期、大频偏情况下的快速捕获问题，该文提出一种基于码相位压缩相关器与快速傅里叶变换(CCPC-FFT)的双驻留伪码快速捕获方法。在第一驻留阶段，利用码相位压缩相关器对相邻码相位进行快速、粗略的压缩搜索，同时利用FFT算法完成对多普勒频偏的并行捕获；在第二驻留阶段，利用传统的相关积分方法对第一驻留捕获的所有码相位进行逐个精确搜索。给出了系统性能的理论分析模型，并通过蒙特卡洛仿真验证了理论分析的正确性。最后仿真结果表明：新方法在平均捕获时间上比2维压缩相关(TDCC)捕获方法进一步缩短，同时提高了频偏的捕获带宽和精度，且针对长码的捕获比其他基于FFT的方法节省资源。
- 扩频通信 /
- 伪码捕获 /
- 压缩相关 /
- 快速傅里叶变换 /
- 双驻留搜索
Abstract: For high speed and high dynamic receiver, using long pseudo-noise code, seriously affected by Doppler frequency offset, this paper proposes a double dwell pseudo-noise code acquisition method based on Compressed Code Phase Correlator (CCPC) and FFT. In the first dwell search a rapid and rough compressed search is performed for some neighboring code phase using CCPC, and at the same time the parallel search for Doppler frequency offset using FFT is completed. In the second dwell, all the neighboring code phases acquired in the first dwell are searched accurately using conventional correlator. The theoretical performance analysis model for the proposed method is presented, whose correctness is validated by Monte Carlo simulation. The simulation result shows that the proposed method has obvious advantages compared to Two-Dimensional Compressed Correlator (TDCC) on Mean Acquisition Time (MAT), as well as on the bandwidth and precision of Doppler frequency. Less resources are consumed than other methods based on FFT when using long pseudo-noise code.
- Spreaded Spectrum Communication (SSC) /
- Pseudo-noise code acquisition /
- Compressed correlator /
- FFT /
- Double dwell search

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参考文献(17)

HOLMES J K. Spread Spectrum System for GNSS and Wireless Communications[M]. Norwood: Artech House Publishers, 2007: 2-10.

YANG C, VASQUEZ J, and CHAFFEE J. Fast direct P(Y)- code acquisition using XFAST[C]. Proceedings of the 12th International Technical Meeting of the Satellite Division of The Institute of Navigation, Nashville, 1999: 317-324.

LI Hong, CUI Xiaowei, and FENG Zhenming. Dual-folding based rapid search method for long PN-code acquisition[J]. IEEE Transactions on Wireless Communications, 2008, 7(12): 5286-5290. doi: 10.1109/T-WC.2008.071130.

罗炬锋, 王翔, 付耀先, 等. 基于FFT并行搜索伪码和频偏的快速捕获新方法[J]. 电子与信息学报, 2011, 33(3): 563-568. doi: 10.3724/SP.J.1146.2010.00560.

LUO Jufeng, WANG Xiang, and Fu Yaoxian, et al. A new fast acquisition method of parallel search pseudo-code and frequency offset based on FFT[J]. Journal of Electronics Information Technology, 2011, 33(3): 563-568. doi: 10.3724/ SP.J.1146.2010.00560.

HSIEH W H and CHANG C F. Efficient acquisition algorithm for long pseudorandom sequence[J]. IEEE Transactions on Aerospace and Electronic Systems, 2014, 50(3): 1786-1797. doi: 10.1109/TAES.2014.120460.

BAHARAK S and ALI M D. Reduced-complexity FFT-based method for Doppler estimation in GNSS receivers[J]. EURASIP Journal on Advances in Signal Processing, 2014(1): 143. doi: 10.1186/1687-6180-2014-143.

何智力, 徐颖, 袁洪, 等. 一种基于二维细化的自适应信号捕获算法[J]. 电子与信息学报, 2014, 36(10): 2450-2455. doi: 10.3724/SP.J.1146.2013.01328.

HE Zhili, XU Ying, YUAN Hong, et al. A two-dimensional refinement algorithm for signal acquisition[J]. Journal of Electronics Information Technology, 2014, 36(10): 2450-2455. doi: 10.3724/SP.J.1146.2013.01328.

LECLERE J, BOTTERON C, and FARINE P A. Acquisition of modern GNSS signals using a modified parallel code-phase search architecture[J]. Signal Processing, 2014, 95: 177-191. doi: 10.1016/j.sigpro.2013.08.004.

SPANGENBERG S M, POVEY G J R, SCOTT I, et al. An FFT-based approach for fast acquisition in spread spectrum communication systems[J]. Wireless Personal Communications, 2000, 13(1): 27-55. doi: 10.1023/A: 1008848916834.

SPILLARD C L, SPANGENBERG S M, and POVEY G J R. A serial-parallel FFT correlator for PN code acquisition from LEO satellites[C]. IEEE 5th International Symposium on Spread Spectrum Techniques and Applications, Sun City, 1998: 446-448. doi: 10.1109/ISSSTA.1998.723823.

KONG S and KIM B. Two-dimensional compressed correlator for fast PN code acquisition[J]. IEEE Transactions on Wireless Communications, 2013, 12(11): 5859-5869. doi: 10.1109/TWC.2013.092313.130407.

KIM B and KONG S. Two-dimensional compressed correlator for fast acquisition of BOC(m, n) signals[J]. IEEE Transactions on Vehicular Technology, 2014, 63(6): 2662-2672. doi: 10.1109/TVT.2013.2293225.

SUST M K, KAUFMANN R F, and MOLITOR F. Rapid acquisition concept for voice acticated CDMA communication[C]. Global Telecommunications Conference, San Diego, 1990: 1820-1826. doi: 10.1109/GLOCOM.1990. 116797.

SHNIDMAN D A. Evaluation of the Q function[J]. IEEE Transactions on Communications, 1974, (3): 342-346. doi: 10.1109/TCOM.1974.1092184.

TORRIERI D. Principles of Spread-Spectrum Communication Systems[M]. New York: Springer Science, 2011: 177-202.

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