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1. 国防科技大学电子科学学院,湖南 长沙 410073
2. 军事科学院,北京 100097
3. 北京信息通信技术研究中心,北京 100036
[ "辜方林(1986− ),男,湖南娄底人,博士,国防科技大学副研究员,主要研究方向为可靠无线通信" ]
[ "黄育侦(1986− ),男,福建莆田人,博士,军事科学院副研究员,主要研究方向为无人集群通信" ]
[ "赵莺(1963− ),女,北京人,博士,北京信息通信技术研究中心正高级工程师,主要研究方向为抗干扰通信、时频同步" ]
[ "赵海涛(1981− ),男,山东昌乐人,博士,国防科技大学教授,主要研究方向为多信道认知组网、无人集群通信" ]
[ "魏急波(1967− ),男,湖北汉川人,博士,国防科技大学教授,主要研究方向为智能无线通信、软件无线电" ]
网络出版日期:2022-11,
纸质出版日期:2022-11-25
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辜方林, 黄育侦, 赵莺, 等. 基于单载波频域均衡的直接序列扩频自适应抗干扰技术[J]. 通信学报, 2022,43(11):26-34.
Fanglin GU, Yuzhen HUANG, Ying ZHAO, et al. Adaptive anti-jamming technologies based on direct sequence spread spectrum and single carrier frequency domain equalization[J]. Journal on communications, 2022, 43(11): 26-34.
辜方林, 黄育侦, 赵莺, 等. 基于单载波频域均衡的直接序列扩频自适应抗干扰技术[J]. 通信学报, 2022,43(11):26-34. DOI: 10.11959/j.issn.1000-436x.2022213.
Fanglin GU, Yuzhen HUANG, Ying ZHAO, et al. Adaptive anti-jamming technologies based on direct sequence spread spectrum and single carrier frequency domain equalization[J]. Journal on communications, 2022, 43(11): 26-34. DOI: 10.11959/j.issn.1000-436x.2022213.
针对复杂多径信道环境下直接序列扩频系统性能受限问题,提出了一种单载波频域均衡(SCFDE)与直接序列扩频(DSSS)技术有机结合的自适应抗干扰扩频通信体制,其特点是通过频域均衡克服多径带来的频率选择性衰落,同时支持自适应调整扩频因子实现系统传输速率与抗干扰能力的重构。进一步地,结合 SCFDE 频域均衡的特点,充分利用其接收端固有的快速傅里叶(FFT)变换过程实现对干扰强度、干扰类型等信息的伴随式检测与分析,在线优化选取频域承载点,提升系统对干扰,特别是阻塞式干扰的适应性。仿真结果表明,无论是高斯还是多径信道环境下,所提的基于 SCFDE 的直扩波形都具有良好的通信性能,且部分频带陷波对通信性能影响较小,验证了自适应优选信息频域承载点抗干扰的有效性。
To solve the performance limitation of direct sequence spread spectrum system in complex multipath environment
an adaptive anti-jamming spread spectrum framework that organically combines single carrier frequency domain equalization (SCFDE) and direct sequence spread spectrum (DSSS) technologies was proposed.The frequency multipath fading was overcame by frequency domain equalization
and the transmission rates and high reliability was reconfigured by deploying variable spread factors.Moreover
the inherent fast Fourier transform process was made full use at the receiver to realize the adjoint detection and analysis of interference intensity
interference type and other information
etc.Then
the frequency domain bearing point online was optimized and selected to improve the adaptability to the interference
especially blocking interference.The simulation results show that the proposed direct spread spectrum waveform based on SCFDE has good communication performance in both Gaussian and multipath environments
and the notch of some frequency bands has little impact on the communication performance
which verifies the effectiveness of anti-jamming by adaptive optimizing information frequency domain bearers.
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FARHANG-BOROUJENY B , MAJID A , MORADIZ H . CP-DSSS:an OFDM compatible variable rate modulation for 5G and beyond [C ] // Proceedings of 2020 IEEE 3rd 5G World Forum (5GWF) . Piscataway:IEEE Press , 2020 : 578 - 583 .
AMINJAVAHERI A , REZAZADEHREYHANI A , KHALONA R , et al . Underlay control signaling for ultra-reliable low-latency IoT communications [C ] // Proceedings of 2018 IEEE International Conference on Communications Workshops . Piscataway:IEEE Press , 2018 : 1 - 6 .
宫丰奎 , 文妮 , 李果 , 等 . 基于CAZAC序列的低复杂度抗频偏同步算法 [J ] . 通信学报 , 2021 , 42 ( 2 ): 64 - 71 .
GONG F K , WEN N , LI G , et al . Low-complexity and frequency-offset-robust synchronization algorithm based on CAZAC sequence [J ] . Journal on Communications , 2021 , 42 ( 2 ): 64 - 71 .
王茸 . SC-FDE 系统中干扰抑制的算法研究与实现 [D ] . 成都:电子科技大学 , 2021 .
WANG R . Research and implementation of interference suppression algorithm in SC-FDE system [D ] . Chengdu:University of Electronic Science and Technology of China , 2021 .
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