Results 61 to 70 of about 6,979 (155)

Microwave system performance summary [PDF]

, 1980
The design of the microwave system for the solar power satellite is described. Design modifications recommended include changes in phase control to the power module level, a reduction in allowable amplitude jitter, the use of metal matrix waveguides, and
Arndt, G. D., Nalos, E. J.
core   +1 more source

Cognitive Anti-Jamming Satellite-To-Ground Communications on NASA's SCaN Testbed [PDF]

Machine learning aided cognitive anti-jamming communications is designed, developed and demonstrated on a live satellite-to-ground link. A wideband autonomous cognitive radio (WACR) is designed and implemented as a hardware-in-the- loop (HITL) prototype.
Christodoulou, Christos, Evans, Mike, Feng, Shuang, Holland, Abriel, Jayaweera, Sudharman K., Mortensen, Dale, Piasecki, Marie   +6 more
core   +1 more source

Jamming modulation aided anti-jamming communication method based on optimized bit error rate

Tongxin xuebao
To enhance anti-suppressive jamming capability, a jamming modulation aided anti-jamming communication method based on optimized bit error rate (BER) was proposed.
Zhang Yusi, Shi Yuxin, Han Chen, Zhao Liping, Li Yong   +4 more
doaj  

Adaptive anti-jamming scheme based on meta-surface antenna

Dianxin kexue
Aiming at the problem that traditional anti-jamming schemes cannot choose suitable anti-jamming strategies according to different types of jamming forms, an adaptive anti-jamming scheme based on meta-surface antenna was proposed.
GUO Yuze, JIN Liang, XU Xiaoming, MA Keming, PEI Chen   +4 more
doaj   +2 more sources

Research on deception jamming of chaotic composite short-range detection system based on bispectral analysis and genetic algorithm–back propagation

International Journal of Distributed Sensor Networks, 2019
The chaotic compound short-range detection system is a new type of short-range detection system, which has strong anti-jamming ability. However, for the deception jamming, the characteristics of the complex short-range detection system are very similar ...
Dongxu Wei, Shuning Zhang, Si Chen, Huichang Zhao, Linzhi Zhu   +4 more
doaj   +1 more source

GPS Anti-Jamming Using Beamforming Technique

Journal of the Korea Institute of Information and Communication Engineering, 2016
GPS 위성 신호는 매우 미약하기 때문에 시스템 재밍에 노출되어 있다. 이러한 재밍은 의도적 또는 미의도적 간섭신호 송출에 따라 발생된다. 만약 재밍 신호가 수신기로 매우 강하게 들어온다면 수신기는 자동적으로 방어할 수 있도록 작동되어야한다. 재밍 상황에서 수신기가 정상적으로 작동할 수 있도록 하는 방법은 공간 필터링이 이용되고 있다. 본 논문에서는 재밍대응 기법으로 신호처리 방법인 빔포밍을 조사하고 사용 가능여부를 분석하였다. 재밍 신호를 받으면 어레이 방향을 바꾸기 위하여 빔포밍은 센서 신호를 통제할 수 있기 때문에 재머 반대 방향으로 제어할 수 있는 고각 θ를 측정하였다. 측정결과 GPS 신호는 안테나가 제어각 안에 있을
openaire   +2 more sources

A Communication Anti-Jamming Scheme Assisted by RIS with Angular Response. [PDF]

Entropy (Basel), 2023
Wang J, Jiang W, Huang K, Sun X.
europepmc   +1 more source

Overview of the system-level anti-jamming capability and developmental challenges of low-earth-orbit signal-of-opportunity

Frontiers in Physics
Signal-of-Opportunity (SOP) navigation based on Low-Earth-Orbit (LEO) satellite constellations has increasingly become a research hotspot. Due to the large number of LEO satellites, wide spectrum coverage, and strong signal power, LEO satellite Signal-of-
Lihao Yao, Lihao Yao, Bin Fan, Honglei Qin, Deyong Xian, Mengli Wang, Boyun Gu, Sumin Chen, Sumin Chen, Changhong Wang, Changhong Wang, Xuyu Wang, Jiemin Shen, Dongfang Jiang, Heng Wei, Haoyuan Yu, Bingjie Liu, Shuai Shao   +17 more
doaj   +1 more source

A Distributed Anti-Jamming Algorithm Based on Actor-Critic Countering Intelligent Malicious Jamming for WSN. [PDF]

Sensors (Basel), 2022
Chen Y, Niu Y, Chen C, Zhou Q, Xiang P.
europepmc   +1 more source

Impacts of Phase Noise on the Anti-Jamming Performance of Power Inversion Algorithm. [PDF]

Sensors (Basel), 2022
Zhou M, Wang Q, He F, Meng J.
europepmc   +1 more source