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HF Communications: Past, Present, and Future 被引量:14
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作者 Jinlong Wang Guoru Ding Haichao Wang 《China Communications》 SCIE CSCD 2018年第9期1-9,共9页
High frequency(HF) communication, commonly covering frequency range between 3 and 30 MHz, is an important wireless communication paradigm to offer over-thehorizon or even global communications with ranges up to thousa... High frequency(HF) communication, commonly covering frequency range between 3 and 30 MHz, is an important wireless communication paradigm to offer over-thehorizon or even global communications with ranges up to thousands of kilometers via skywave propagation with ionospheric refraction. It has widespread applications in fields such as emergency communications in disaster areas, remote communications with aircrafts or ships and non-light-of-the-sight military operations. This tutorial article overviews the history of HF communication, demystifies the recent advances, and provides a preview of the next few years, which the authors believe will see fruitful outputs towards wideband, intelligent and integrated HF communications. Specifically, we first present brief preliminaries on the unique features of HF communications to facilitate general readers in the communication community. Then, we provide a historical review to show the technical evolution on the three generations of HF communication systems. Further, we highlight the key challenges and research directions. We hope that this article will stimulate more interests in addressing the technical challenges on the research and development of future HF radio communication systems. 展开更多
关键词 hf communications skywave propagation ionospheric refraction cognitive radio artificial intelligence
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A Heterogeneous Information Fusion Deep Reinforcement Learning for Intelligent Frequency Selection of HF Communication 被引量:6
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作者 Xin Liu Yuhua Xu +3 位作者 Yunpeng Cheng Yangyang Li Lei Zhao Xiaobo Zhang 《China Communications》 SCIE CSCD 2018年第9期73-84,共12页
The high-frequency(HF) communication is one of essential communication methods for military and emergency application. However, the selection of communication frequency channel is always a difficult problem as the cro... The high-frequency(HF) communication is one of essential communication methods for military and emergency application. However, the selection of communication frequency channel is always a difficult problem as the crowded spectrum, the time-varying channels, and the malicious intelligent jamming. The existing frequency hopping, automatic link establishment and some new anti-jamming technologies can not completely solve the above problems. In this article, we adopt deep reinforcement learning to solve this intractable challenge. First, the combination of the spectrum state and the channel gain state is defined as the complex environmental state, and the Markov characteristic of defined state is analyzed and proved. Then, considering that the spectrum state and channel gain state are heterogeneous information, a new deep Q network(DQN) framework is designed, which contains multiple sub-networks to process different kinds of information. Finally, aiming to improve the learning speed and efficiency, the optimization targets of corresponding sub-networks are reasonably designed, and a heterogeneous information fusion deep reinforcement learning(HIF-DRL) algorithm is designed for the specific frequency selection. Simulation results show that the proposed algorithm performs well in channel prediction, jamming avoidance and frequency channel selection. 展开更多
关键词 hf communication ANTI-JAMMING intelligent frequency selection markov decision process deep reinforcement learning
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Exploring Channel Diversity in HF Communication Systems: A Matching-Potential Game Approach 被引量:4
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作者 Wen Li Lang Ruan +3 位作者 Yifan Xu Yuli Zhang Yitao Xu Xinhong Shao 《China Communications》 SCIE CSCD 2018年第9期60-72,共13页
This paper investigates the channel diversity problem in high frequency(HF) communication systems. Due to the limited HF spectrum resources, a HF communication system with shared channels is considered, where each use... This paper investigates the channel diversity problem in high frequency(HF) communication systems. Due to the limited HF spectrum resources, a HF communication system with shared channels is considered, where each user equipment(UE) has individual communication demand. In order to maximize the communication probability of the whole system, a matching-potential game framework is designed. In detail, the channel diversity problem is decomposed into two sub-problems. One is channel-transmitter matching problem, which can be formulated as a many-to-one matching game. The other is the transmitter allocation problem which decides the transmission object that each transmitter communicates with under channel-transmitter matching result, and this sub-problem can be modeled as a potential game. A multiple round stable matching algorithm(MRSMA) is proposed, which obtains a stable matching result for the first sub-problem, and a distributed BR-based transmitter allocation algorithm(DBRTAA) is designed to reach Nash Equilibrium(NE) of the second sub-problem. Simulation results verify the effectiveness and superiority of the proposed method. 展开更多
关键词 hf communication channel diversity game theory many-to-one matching game potential game.
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Deep Spectrum Prediction in High Frequency Communication Based on Temporal-Spectral Residual Network 被引量:9
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作者 Ling Yu Jin Chen +2 位作者 Yuming Zhang Huaji Zhou Jiachen Sun 《China Communications》 SCIE CSCD 2018年第9期25-34,共10页
High frequency(HF) communication is widely spread due to some merits like easy deployment and wide communication coverage. Spectrum prediction is a promising technique to facilitate the working frequency selection and... High frequency(HF) communication is widely spread due to some merits like easy deployment and wide communication coverage. Spectrum prediction is a promising technique to facilitate the working frequency selection and enhance the function of automatic link establishment. Most of the existing spectrum prediction algorithms focus on predicting spectrum values in a slot-by-slot manner and therefore are lack of timeliness. Deep learning based spectrum prediction is developed in this paper by simultaneously predicting multi-slot ahead states of multiple spectrum points within a period of time. Specifically, we first employ supervised learning and construct samples depending on longterm and short-term HF spectrum data. Then, advanced residual units are introduced to build multiple residual network modules to respectively capture characteristics in these data with diverse time scales. Further, convolution neural network fuses the outputs of residual network modules above for temporal-spectral prediction, which is combined with residual network modules to construct the deep temporal-spectral residual network. Experiments have demonstrated that the approach proposed in this paper has a significant advantage over the benchmark schemes. 展开更多
关键词 hf communication deep learning spectrum prediction temporal-spectral residual network
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Research on Multi-Layer Distributed HF Radio Network Structure
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作者 Hui Dai Chun-Jiang Wang Quan Yu 《Journal of Electronic Science and Technology of China》 2008年第1期16-20,共5页
High frequency(HF)transmission is an important communication techniques.However,conven-tional point-to-point transmission can be easily destroyed,which limits its utilization in practice.HF networking communication ... High frequency(HF)transmission is an important communication techniques.However,conven-tional point-to-point transmission can be easily destroyed,which limits its utilization in practice.HF networking communication has the capability against demolishment.The network structure is one of the key factors for HF networking communication.In this paper,a novel analysis method of the network connectedness based on the eigenvalue is derived,and a multi-layer distributed HF radio network structure is proposed.Both the theore-tical analysis and the computer simulation results verify that the application of the proposed network structure in the HF radio communication can improve the anti-demolishment ability of the HF network efficiently. 展开更多
关键词 High frequency hf communication high frequency hf network military communication network structure.
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基于USB2.0的温湿度及气压集成测量系统 被引量:4
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作者 邓元龙 吴玉斌 苏河滔 《微计算机信息》 北大核心 2008年第35期48-50,共3页
本文以USB2.0控制芯片CY7C68013为核心,采用DS18B20、MS5534和HF3223精密测量环境温度、气压和湿度,所采用的传感器均为数字式或准数字式,无需标定。采用直接读取暂存器的方法,温度示值分辨率细分到0.01℃;在51~84%RH范围内,湿度测量... 本文以USB2.0控制芯片CY7C68013为核心,采用DS18B20、MS5534和HF3223精密测量环境温度、气压和湿度,所采用的传感器均为数字式或准数字式,无需标定。采用直接读取暂存器的方法,温度示值分辨率细分到0.01℃;在51~84%RH范围内,湿度测量精度优于±3.4%RH;气压测量不确定度为±0.5mbar。系统具有便携和低功耗的特点,既可以独立工作,又可以通过USB端口与PC机相连,实现测量数据传送与进一步处理。 展开更多
关键词 CY7C68013 MS5534 ds18B20 hf3223 温湿度 气压测量
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一种短波高速数据传输“隐身”通信体制的关键技术研究 被引量:1
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作者 卜卫东 苟彦新 田岩 《通信对抗》 2006年第4期39-43,共5页
为了进一步提高短波高速数据传输系统的数据速率和抗干扰、抗截获性能,在研究MCDS-CDMA通信技术的基础上,提出了应用于短波高速数传通信的自适应VSF/MC—DS隐身通信体制。讨论了VSF/MC—DS隐身通信系统的发送接收原理及其在短波高... 为了进一步提高短波高速数据传输系统的数据速率和抗干扰、抗截获性能,在研究MCDS-CDMA通信技术的基础上,提出了应用于短波高速数传通信的自适应VSF/MC—DS隐身通信体制。讨论了VSF/MC—DS隐身通信系统的发送接收原理及其在短波高速数据传输体制中的应用优势、策略扣关键技术。最后通过MATLAB仿真,验证了它作为短波高速数据传输隐身通信体制的抗干扰性能和可行性。 展开更多
关键词 短波通信 MC ds—CDMA VSF/MC—ds 隐身通信 数据传输
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一种短波高速数据传输“隐身”通信体制的关键技术研究
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作者 卜卫东 苟彦新 田岩 《中国电子科学研究院学报》 2006年第6期523-526,551,共5页
介绍了应用于短波极具潜力的VSF/MC-DS隐身通信技术,讨论了VSF/MC-DS隐身通信系统发送接收原理、频谱特征及其在短波高速数据传输体制中的应用优势和策略。最后,通过MATLAB仿真,验证了它作为短波高速数据传输体制抗干扰、抗截获的可行性。
关键词 短波(hf) VSF/MC—ds隐身通信 高速数据传输 抗干扰
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A Remote Temperature Monitoring System Based on GSM 被引量:1
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作者 Yong-ming LI,Yin-jing GUO,Yuan Zhao,Ji-fen Zhang (College of Information and Electrical Engineering,Shandong University of Science and Technology,Qingdao 266510,China) 《Journal of Measurement Science and Instrumentation》 CAS 2010年第S1期34-37,共4页
This paper has discussed the home and abroad’s current situation of temperature monitoring system and compared the advantages and disadvantages of several common methods.According to cold storage,container, medicines... This paper has discussed the home and abroad’s current situation of temperature monitoring system and compared the advantages and disadvantages of several common methods.According to cold storage,container, medicines library and greenhouse’s requirements on temperature,this thesis has analyzed the advantages and significance of the system and elaborated each module’s function and implementation based on hardware and software’s introduction and demonstrated the pictures of its practical application and the alarm information saved in the SD card which extracted from the database. 展开更多
关键词 ds18B20 GSM(Global System for Mobile communications) SD card DATABASE
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直扩/跳频信号功率谱密度估计 被引量:1
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作者 蔡毅 许斌 杨晓龙 《现代电子技术》 2013年第7期41-43,共3页
通过直扩/跳频信号的功率谱密度分析,从理论上指出了经典功率谱估计周期图法的局限性,并借助韦尔奇算法对其进行修正。依靠Matlab进行实验仿真,结果表明韦尔奇法能够获得性能良好的直扩/跳频信号功率谱,并能够较为准确地测试出直扩/跳... 通过直扩/跳频信号的功率谱密度分析,从理论上指出了经典功率谱估计周期图法的局限性,并借助韦尔奇算法对其进行修正。依靠Matlab进行实验仿真,结果表明韦尔奇法能够获得性能良好的直扩/跳频信号功率谱,并能够较为准确地测试出直扩/跳频信号带内载波功率动态不平衡度。 展开更多
关键词 直扩 跳频通信 功率谱密度 韦尔奇方法 载波功率动态不平衡度
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直接序列扩频通信侦察技术实验模型
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作者 廖仕珍 《电子科技大学学报》 EI CAS CSCD 北大核心 1996年第S3期350-350,共1页
直接序列扩频通信侦察技术实验模型主研人员:郭伟余敬东洪福明李牧张国平三超时冯天久蒋明该研究成果直接应用于"直接序列扩频通信对抗系统"中,为直扩通信对抗装备和直扩通信侦收提供技术支撑,同时本项目成果所突破的关键技术可应... 直接序列扩频通信侦察技术实验模型主研人员:郭伟余敬东洪福明李牧张国平三超时冯天久蒋明该研究成果直接应用于"直接序列扩频通信对抗系统"中,为直扩通信对抗装备和直扩通信侦收提供技术支撑,同时本项目成果所突破的关键技术可应用于CDMA通信系统的开发和管理。... 展开更多
关键词 hf communication FREQUENCY HOPPING FREQUENCY RELATIVE timedelay
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A Novel Device for Real-Time Monitoring of High Frequency Phenomena in CENELEC PLC Band
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作者 Bashir Ahmed Siddiqui Pertti Pakonen Pekka Verho 《Smart Grid and Renewable Energy》 2012年第2期152-157,共6页
This paper proposes the design and development of a novel, portable and low-cost intelligent electronic device (IED) for real-time monitoring of high frequency phenomena in CENELEC PLC band. A high speed floating-poin... This paper proposes the design and development of a novel, portable and low-cost intelligent electronic device (IED) for real-time monitoring of high frequency phenomena in CENELEC PLC band. A high speed floating-point digital signal processor (DSP) along with 4 MSPS analog-to-digital converter (ADC) is used to develop the intelligent electronic device. An optimized algorithm to process the analog signal in real-time and to extract the meaningful result using signal processing techniques has been implemented on the device. A laboratory environment has setup with all the necessary equipment including the development of the load model to evaluate the performance of the IED. Smart meter and concentrator is also connected to the low voltage (LV) network to monitor the PLC communication using the IED. The device has been tested in the laboratory and it has produced very promising results for time domain as well as frequency domain analysis. Those results imply that the IED is fully capable of monitoring high frequency disturbances in CENELEC PLC band. 展开更多
关键词 Power Line communication (PLC) DIGITAL Signal PROCESSOR (dsP) Analog-to-Digital Converter (ADC) Fast FOURIER Transform (FFT) High Frequency (hf) Interference
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