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Beam squint effect on high-throughput millimeter-wave communication with an ultra-massive phased array

Zhiqiang Wang, Jiawei Liu, Jun Wang, Guangrong Yue,wangzq@std.uestc.edu.cn,842927584@qq.com,junwang@uestc.edu.cn,yuegr@uestc.edu.cn

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 4, Pages 560-570 doi: 10.1631/FITEE.2000451

Abstract: An can be deployed in high-throughput communication systems to increase the transmission distance. However, when the signal bandwidth is large, the antenna array response changes with the frequency, causing . In this paper, we investigate the effect on a high-throughput mmWave communication system with the single-carrier frequency-domain equalization transmission scheme. Specifically, we first view analog beamforming and the physical channel as a spatial equivalent channel. The characteristics of the spatial equivalent channel are analyzed which behaves like frequency-selective fading. To eliminate the deep fading points in the spatial equivalent channel, an advanced analog beamforming method is proposed based on the (ZC) sequence. Then, the low-complexity linear zero-forcing and minimum mean squared error equalizers are considered at the receiver. Simulation results indicate that the proposed ZC-based analog beamforming method can effectively mitigate the performance loss by the .

Keywords：超大规模相控阵；毫米波；波束倾斜；Zadoff-Chu；单载波频域均衡

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Extreme-scale parallel computing: bottlenecks and strategies None

Ze-yao MO

Frontiers of Information Technology & Electronic Engineering 2018, Volume 19, Issue 10, Pages 1251-1260 doi: 10.1631/FITEE.1800421

Abstract:

Extreme-scale numerical simulations seriously demand extreme parallel computing capabilities. To address the challenges of these capabilities toward exascale, we systematically analyze the major bottlenecks of parallel computing research from three perspectives: computational scale, computing efficiency, and programming productivity. For these bottlenecks, we propose a series of urgent key issues and coping strategies. This study will be useful in synchronizing development between the numerical computing capability and supercomputer peak performance.

Keywords： Extreme scale Numerical simulation Parallel computing Supercomputers

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Integrated communication and localization in millimeter-wave systems

Jie Yang, Jing Xu, Xiao Li, Shi Jin, Bo Gao,yangjie@seu.edu.cn,shadowaccountxj@foxmail.com,li_xiao@seu.edu.cn,jinshi@seu.edu.cn,gao.bo1@zte.com.cn

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 4, Pages 457-470 doi: 10.1631/FITEE.2000505

Abstract: As the fifth-generation (5G) mobile communication system is being commercialized, extensive studies on the evolution of 5G and sixth-generation (6G) mobile communication systems have been conducted. Future mobile communication systems are evidently evolving toward a more intelligent and software-reconfigurable functionality paradigm that can provide ubiquitous communication, as well as sense, control, and optimize wireless environments. Thus, integrating communication and localization using the highly directional transmission characteristics of millimeter waves (mmWaves) is a promising route. This approach not only expands the localization capabilities of a communication system but also provides new concepts and opportunities to enhance communication. In this paper, we explain the in mmWave systems, in which these processes share the same set of hardware architecture and algorithms. We also provide an overview of the key enabling technologies and the basic knowledge on localization. Then, we provide two promising directions for studies on localization with an and model-based (or model-driven) . We also discuss a comprehensive guidance for location-assisted mmWave communications in terms of channel estimation, channel state information feedback, beam tracking, synchronization, interference control, resource allocation, and user selection. Finally, we outline the future trends on the mutual assistance and enhancement of communication and localization in integrated systems.

Keywords：毫米波；通信定位一体化；位置辅助通信；超大规模天线阵列；可重构智能表面；人工智能；神经网络

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Prior information based channel estimation for millimeter-wave massive MIMO vehicular communications in 5G and beyond Research Articles

Zhao Yi, Weixia Zou, Xuebin Sun,yz17tx@bupt.edu.cn,zwx0218@bupt.edu.cn

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 6, Pages 777-789 doi: 10.1631/FITEE.2000515

Abstract: (mmWave) has been claimed as the viable solution for high-bandwidth s in 5G and beyond. To realize applications in future s, it is important to take a robust mmWave vehicular network into consideration. However, one challenge in such a network is that mmWave should provide an ultra-fast and high-rate data exchange among vehicles or vehicle-to-infrastructure (V2I). Moreover, traditional real-time strategies are unavailable because vehicle mobility leads to a fast variation mmWave channel. To overcome these issues, a approach for mmWave V2I communications is proposed in this paper. Specifically, by considering a fast-moving vehicle secnario, a corresponding mathematical model for a fast channel is first established. Then, the temporal variation rule between the base station and each mobile user and the determined direction-of-arrival are used to predict the channel prior information (PI). Finally, by exploiting the PI and the characteristics of the channel, the channel is estimated. The simulation results show that the scheme in this paper outperforms traditional ones in both normalized mean square error and sum-rate performance in the mmWave vehicular system.

Keywords：大规模多入多出；毫米波；信道估计；车辆通信；时变

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Beamforming techniques for massive MIMO systems in 5G: overview, classification, and trends for future research Review

Ehab ALI, Mahamod ISMAIL, Rosdiadee NORDIN, Nor Fadzilah ABDULAH

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 6, Pages 753-772 doi: 10.1631/FITEE.1601817

Abstract: Massive multiple-input multiple-output (MIMO) systems combined with beamforming antenna array technologies are expected to play a key role in next-generation wireless communication systems (5G), which will be deployed in 2020 and beyond. The main objective of this review paper is to discuss the state-of-the-art research on the most favourable types of beamforming techniques that can be deployed in massive MIMO systems and to clarify the importance of beamforming techniques in massive MIMO systems for eliminating and resolving the many technical hitches that massive MIMO system implementation faces. Classifications of optimal beamforming techniques that are used in wireless communication systems are reviewed in detail to determine which techniques are more suitable for deployment in massive MIMO systems to improve system throughput and reduce intra- and inter-cell interference. To overcome the limitations in the literature, we have suggested an optimal beamforming technique that can provide the highest performance in massive MIMO systems, satisfying the requirements of next-generation wireless communication systems.

Keywords： Beamforming classifications Massive MIMO Hybrid beamforming Millimetre-wave beamforming

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Performance analysis and power allocation of mixed-ADC multi-cell millimeter-wave massive MIMO systems with antenna selection

Tao Zhou, Guichao Chen, Cheng-xiang Wang, Jiayi Zhang, Liu Liu, Yiqun Liang,taozhou@bjtu.edu.cn,17120045@bjtu.edu.cn,chxwang@seu.edu.cn,jiayizhang@bjtu.edu.cn,liuliu@bjtu.edu.cn,liangyiqun@139.com

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 4, Pages 571-585 doi: 10.1631/FITEE.2000509

Abstract: In this study, we consider a multi-cell (mmWave) system with a (mixed-ADC) and hybrid beamforming architecture, in which is applied to achieve intelligent assignment of high- and low-resolution ADCs. Both exact and approximate closed-form expressions for the uplink achievable rate are derived in the case of maximum-ratio combining reception. The impacts on the achievable rate of user transmit power, number of radio frequency chains at a base station, ratio of high-resolution ADCs, number of propagation paths, and number of quantization bits are analyzed. It is shown that the user transmit power can be scaled down inversely proportional to the number of antennas at the base station. We propose an efficient power allocation scheme by solving a complementary geometric programming problem. In addition, the energy efficiency is investigated, and an optimal tradeoff between the achievable rate and power consumption is discussed. Our results will provide a useful reference for the study of mixed-ADC multi-cell mmWave massive MIMO systems with .

Keywords：毫米波；大规模多输入多输出；混合模拟-数字转换器；性能分析；天线选择

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State-of-the-Art High Purity Water

Wen Ruimei

Strategic Study of CAE 2000, Volume 2, Issue 1, Pages 68-72

Abstract:

In this paper, the relationship between the ultra large scale integrated circuits (ULSI) and high purity water and the demands for water quality are described.Several key new techniques of high purity water fabrication are studied. A method for improving the quality of high purity water is proposed, which can effectively decrease the concentrations of total organic carbon (TOC), bacteria and bacterial endotoxins and dissolved oxygen.The contamination of high purity water caused by various pipe materials is described.Some data and examples of author´s experiments are also included.

Keywords： High purity water Ultra large scale integrated circuits Total organic carbon Bacteria and Bacterial endotoxins Dissolved oxygen

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The construction and key techniques of the Fourth Nanjing Yangtze River Bridge

Wu Huanling

Strategic Study of CAE 2013, Volume 15, Issue 8, Pages 4-11

Abstract:

The Fourth Nanjing Yangtze River Bridge is the first suspension bridge of three-span steel box girder using continuity and flexible bearing system with a main span of 1418 m, and makes use of the flexible bearing system and distributional force transmission system with main rope for the first time. It overcomes the deep foundation design and construction technical problems of oversized "∞" shape diaphragm wall and ultra-large well-sinking under complicated geological conditions, proposes the technologies of main rope mixed-knit and argon-rich gas shielded arc welding, and uses the pavement technique of compound gussasphalt at steel bridge deck. Additionally, it utilizes synthetical technique to control construction quality of bulk mass concrete. This text summarizes the construction management and key technical innovation.

Keywords： construction management key technical innovation complicated geological conditions oversized “∞” shape diaphragm wall ultra-large well-sinking

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Study on motion compensation method for MMW Chirp － SF radar

Wang Guili,Li Xingguo

Strategic Study of CAE 2008, Volume 10, Issue 7, Pages 184-187

Abstract:

MMW Chirp - SF radar is a kind of radar to get high range resolution, but the problem of rangevelocity coupling is serious. So it is necessary to carry out the motion compensation in order to increase the range resolution of moving target. This paper puts forward a velocity measurement method compounding the Pulse Doppler velocity measurement and the time-domain correlation method based on Chirp - SF signal. The simulations results show that this method can be used to measure velocity accurately with simple arithmetic and high speed.

Keywords： MMW radar Chirp - SF Doppler motion compensation

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Hyperscale Public Cloud Computing Platform

14 Dec 2022

Keywords： 2022全球十大工程成就

Extended Hemispherical Lens and Its Applications in Millimeter Wave Focal Imaging Systems

Sun Zhongliang,Dou Wenbin

Strategic Study of CAE 2000, Volume 2, Issue 3, Pages 42-47

Abstract: on the lens surface, the field distribution in focal space of the lens is analyzed by using Stratton-Chu

Keywords： millimeter waves antennas imaging extended hemispherical lens

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Hyperscale Public Cloud Computing Platform(English)

20 Dec 2022

Keywords： 2022全球十大工程成就

The application of advanced threshold denoising tothe MMW target radiation signal

Fan Qinghui,Li Xingguo

Strategic Study of CAE 2008, Volume 10, Issue 7, Pages 153-157

Abstract:

In this paper based on the characteristics of millimeter wave radiation signal for wavelet transform, non-negative wavelet coefficient is used as the wavelet coefficient of the signal. For a given threshold value, the wavelet coefficient which is smaller than the threshold is set zero and the wavelet coefficient which is larger than the threshold is set the difference between the coefficient and a constant a.The method for valuing a is inferred by the variance function of signal, and the experiments show that it has good ability of removing the noise in MMW target radiation signal.

Keywords： The application of advanced threshold denoising tothe MMW target radiation signal

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Simulation on Hitting Probability of MMW Remote ControllingTrajectory Correction Munition Intercepting Mobile Anti-ship Missile

Hu Ronglin,Li Xingguo

Strategic Study of CAE 2007, Volume 9, Issue 10, Pages 65-70

Abstract:

The basic principle of millimeter wave remote controlling munitions (MMW-RCTCM) is demonstrated in the introduction. Then the concept of correctable intercepting flow is proposed. And the anti-air shooting model of millimeter wave remote controlling munitions (MMW-RCTCM) intercepting mobile anti-ship missile (MACM) is established in section 2 and 3. Subsequently, the hitting probability of single MMW-RCTCM vs. single MACM as well as MMW-RCTCM flow vs. single MACM and MMW-RCTCM flow vs. MACM flow are analyzedin detail. The probabilities of the above are simulated based on the parameters of the two sides of attacking and intercepting in the 5th section. It is illustrated that comparing with the non-controlling munitions, the efficiency of MMW-RCTCM is increased remarkably. At the last, it is concluded that the MMW-RCTCM can resist the attacking of saturate flow; ultra-sonic MACM.

Keywords： MMW remote controlling trajectory correction munitions correctable intercepting flow anti-ship missile hitting probability

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Near range millimeter wave synthetic aperture radiometer passive range measurement

Wang Benqing,Li Xingguo

Strategic Study of CAE 2010, Volume 12, Issue 3, Pages 95-99

Abstract:

The Particle Swarm Optimization (PSO) is an evolutionary computation, which not only can search solutions randomly and fully, but also is convenient to be carried out. Hence, the article focuses on the application of PSO to the multiple-objective coordination optimization of project, looking forward to seeking best solutions easily and quickly. After introducing the basic theory of the algorithms and its several versions, the article aims at the efficiency coefficient of quality, cost, time and resource subsystem, and set up a multiple optimization coordination model. In the following part, the article introduces how to apply PSO to solve the project coordination optimization problem in detail. The numeric example followed indicates that PSO can solve the multiple-objectives coordination optimization problem of project exactly and quickly.

Keywords： Particle Swarm Optimization (PSO) project management efficiency coefficient of coordination multiple optimization coordination model numeric example

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Title Author Date Type Operation

Beam squint effect on high-throughput millimeter-wave communication with an ultra-massive phased array

Zhiqiang Wang, Jiawei Liu, Jun Wang, Guangrong Yue,wangzq@std.uestc.edu.cn,842927584@qq.com,junwang@uestc.edu.cn,yuegr@uestc.edu.cn

Journal Article

Extreme-scale parallel computing: bottlenecks and strategies

Ze-yao MO

Journal Article

Integrated communication and localization in millimeter-wave systems

Jie Yang, Jing Xu, Xiao Li, Shi Jin, Bo Gao,yangjie@seu.edu.cn,shadowaccountxj@foxmail.com,li_xiao@seu.edu.cn,jinshi@seu.edu.cn,gao.bo1@zte.com.cn

Journal Article

Prior information based channel estimation for millimeter-wave massive MIMO vehicular communications in 5G and beyond

Zhao Yi, Weixia Zou, Xuebin Sun,yz17tx@bupt.edu.cn,zwx0218@bupt.edu.cn

Journal Article

Beamforming techniques for massive MIMO systems in 5G: overview, classification, and trends for future research

Ehab ALI, Mahamod ISMAIL, Rosdiadee NORDIN, Nor Fadzilah ABDULAH

Journal Article

Performance analysis and power allocation of mixed-ADC multi-cell millimeter-wave massive MIMO systems with antenna selection

Tao Zhou, Guichao Chen, Cheng-xiang Wang, Jiayi Zhang, Liu Liu, Yiqun Liang,taozhou@bjtu.edu.cn,17120045@bjtu.edu.cn,chxwang@seu.edu.cn,jiayizhang@bjtu.edu.cn,liuliu@bjtu.edu.cn,liangyiqun@139.com

Journal Article

State-of-the-Art High Purity Water

Wen Ruimei

Journal Article

The construction and key techniques of the Fourth Nanjing Yangtze River Bridge

Wu Huanling

Journal Article

Study on motion compensation method for MMW Chirp － SF radar

Wang Guili,Li Xingguo

Journal Article

Hyperscale Public Cloud Computing Platform

14 Dec 2022