Design and FPGA Implementation of VDES Demodulation System Based on Decision Feedback Algorithm

被引：0
|
作者：
Sun D. [1 ]
Feng M. [1 ]
Di F. [2 ]
Chen P. [1 ]
机构：
[1] School of Infomation Science and Engineering, Southeast University, Jiangsu, Nanjing
[2] Mathematical and Physics Department, Sanjiang University, Jiangsu, Nanjing
来源：
Binggong Xuebao/Acta Armamentarii | 2024年 / 45卷 / 01期
关键词：
decision feedback; filed programmable gate array; signal processing; VHF data exchange system;
D O I：
10.12382/bgxb.2022.0471
中图分类号：
学科分类号：
摘要：
VHF data exchange system (VDES) has broad application prospect as a new generation of ship communication system. Due to the high-speed motion of satellite, a large Doppler frequency shift is superimposed on the ASM uplink in VDES, and the channel parameters estimated only by training sequence in receiving end cannot meet the requirements of demodulation. Therefore, a VDES demodulation system based on decision feedback algorithm is proposed. The received data is split into small segments, which reduces the influence of frequency offset. The demodulated result of each segment is used as pilot to estimate the channel parameters in current data segment. Simulated results show that the performance of the proposed algorithm is superior to that of the coherent demodulation algorithm without feedback. On the basis of the above research, the correct demodulation of ASM uplink without pilots is implemented on the filed programmable gate array(FPGA). © 2024 China Ordnance Industry Corporation. All rights reserved.
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页码：312 / 318
页数：6
相关论文
共 21 条
  • [1] GONG H F., Talking about VDES [ J ], China Maritime Safety, 3, pp. 53-55, (2016)
  • [2] ZHAO Y M, WANG L L, AI Y F, Et al., Development status and application prospect of VDES [ J ], Satellite Communication, 2, pp. 41-45, (2022)
  • [3] HAO Y C, LI H X, FANG L, Et al., Frame synchronization scheme in very high frequency data exchange system (VDES), 椅Proceedings of 2016 Smart Grid Development Seminar, pp. 655-659, (2016)
  • [4] MA S X, SHI K, MENG X, Et al., Frequency offset estimation algorithm of VDES signals based on cross-correlation [ C ], 椅Proceedings of the 2018 IEEE 4th International Conference on Computer and Communications, pp. 1234-1238, (2018)
  • [5] FITZ M P., Further results in the fast estimation of a signal frequency, IEEE Transactions of Commun, 42, 2, pp. 862-864, (1994)
  • [6] FAN J H, WANG J X., Research on frequence offset estimation and phase tracking algorithm in VDES [ J], Electronic Measurement Technology, 43, 23, pp. 51-56, (2020)
  • [7] MENGALI U, MORELLI M., Data-aided frequency estimation for burst digital transmission, IEEE Transactions on Communications, 45, 1, pp. 23-25, (1997)
  • [8] TRUCHACHEV D, MCNUTT D., Joint packet detection and decoding for maritime data exchange systems, Proceedings of OCEANS 2015-MTS / IEEE, pp. 1-6, (2015)
  • [9] L魣ZARO F, RAULEFS R, WANG W, Et al., VHF data exchange system (VDES): an enabling technology for maritime communications[ J ], CEAS Space Journal, 11, pp. 55-63, (2019)
  • [10] SHI K., Study on synchronization parameters estimation of QPSK signal in VDES, (2019)
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