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Empirical study on directional millimeter-wave propagation in vehicle-to-infrastructure communications between road and roadside

Xichen Liu, Lin Yang, Daizhong Yu,362475709@qq.com,eelyang@uestc.edu.cn,15908107465@163.com

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 4, Pages 503-516 doi: 10.1631/FITEE.2000464

Abstract: Based on the obtained RSS, a novel close-in (CI) model considering the effect of the transmitter (TX)and receiver (RX) antenna heights (CI-TRH model) is developed.Our modified , CI-TRH model, and two-section exponential PDP model are proved to be effective.

Keywords：毫米波；两径模型；均方根时延扩展；功率延迟分布；CI-TRH路径损耗模型

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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:

Recently millimeter wave imaging absorbs many attentions. Especially much research work has been done on the millimeter focal imaging because of its advantage of real time imaging. This paper analyzes extended hemispherical lens, which can be used in focal imaging. An integrated antenna array is placed at the back plane of the lens to receive the power focused by the lens. This structure can eliminate the effect of the surface wave exited in the thick dielectric substrates at millimeter wave wavelengths. Low loss and compact are its merit. Assuming an electromagnetic wave is incident on the lens surface, the field distribution in focal space of the lens is analyzed by using Stratton-Chu formula and ray tracing method. It will provide much information about the imaging performance of the lens. Experiments have been carried out for two types of incident waves, one is normally incident plane wave and another is Gaussian-beam. Good agreement has been found between experiments and calculation results. The lens antenna also can be used to eliminate the transition between paraboloidal antenna and integrated front-end in conventional integrated millimeter wave systems so that the system loss can be decreased and performance can be improved. Furthermore, the lens can be used to couple with a quasi-optical system. The results presented here will provide useful guidelines for the above mentioned applications.

Keywords： millimeter waves antennas imaging extended hemispherical lens

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A general altitude-dependent path loss model for UAV-to-ground millimeter-wave communications Research Articles

Qiuming Zhu, Mengtian Yao, Fei Bai, Xiaomin Chen, Weizhi Zhong, Boyu Hua, Xijuan Ye,zhuqiuming@nuaa.edu.cn,yaomengtian@nuaa.edu.cn,baifei@nuaa.edu.cn,chenxm402@nuaa.edu.cn,zhongwz@nuaa.edu.cn,byhua@nuaa.edu.cn,yexijuan@nuaa.edu.cn

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 6, Pages 767-776 doi: 10.1631/FITEE.2000497

Abstract: A general empirical (PL) model for air-to-ground (A2G) millimeter-wave (mmWave) channels is proposed in this paper. Different from existing PL models, the new model takes the height factor of unmanned aerial vehicles (UAVs) into account, and divides the propagation conditions into three cases (i.e., line-of-sight, reflection, and diffraction). A map-based deterministic PL prediction algorithm based on the (RT) technique is developed, and is used to generate numerous PL data for different cases. By fitting and analyzing the PL data under different scenarios and UAV heights, model parameters are provided. Simulation results show that the proposed model can be effectively used to predict PL values for both low- and high-altitude cases. The prediction results of the proposed model better match the RT-based calculation results than those of the Third Generation Partnership Project (3GPP) model and the close-in model. The standard deviation of the PL is also much smaller. Moreover, the new model is flexible and can be extended to other A2G scenarios (not included in this paper) by adjusting the parameters according to the simulation or measurement data.

Keywords：传播损耗；无人机对地信道；毫米波通信信道；射线追踪；高度相关

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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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OTFS modulation performance in a satellite-to-ground channel at sub-6-GHz and millimeter-wave bands with high mobility

Tianshi Li, Ruisi He, Bo Ai, Mi Yang, Zhangdui Zhong, Haoxiang Zhang,19125026@bjtu.edu.cn,ruisi.he@bjtu.edu.cn,boai@bjtu.edu.cn,17111030@bjtu.edu.cn,zhdzhong@bjtu.edu.cn,zhx61778294@126.com

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 4, Pages 517-526 doi: 10.1631/FITEE.2000468

Abstract: modulation has been widely considered for high-mobility scenarios. have recently received much attention as a typical high-mobility scenario and face great challenges due to the high Doppler shift. To enable reliable communications and high spectral efficiency in satellite mobile communications, we evaluate OTFS modulation performance for geostationary Earth orbit and low Earth orbit satellite-to-ground channels at sub-6-GHz and millimeter-wave bands in both line-of-sight and non-line-of-sight cases. The is used to improve the bit error rate performance. The adaptability of OTFS and the signal detection technologies in satellite-to-ground channels are analyzed. Simulation results confirm the feasibility of applying OTFS modulation to with high mobility. Because full diversity in the delay-Doppler domain can be explored, different terminal movement velocities do not have a significant impact on the performance of OTFS modulation, and OTFS modulation can achieve better performance compared with classical orthogonal frequency division multiplexing in satellite-to-ground channels. It is found that MMSE-SD can improve the performance of OTFS modulation compared with an MMSE equalizer.

Keywords：时延-多普勒域；高移动性通信；最小均方误差算法；正交时频空；星地通信；毫米波通信

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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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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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Spatial fading channel emulation for over-the-air testing of millimeter-wave radios: concepts and experimental validations

Wei Fan, Lassi Hentilä, Pekka Kyösti,wfa@es.aau.dk

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 4, Pages 548-559 doi: 10.1631/FITEE.2000484

Abstract: Millimeter-wave (mmWave) communication is regarded as the key enabling component for fifth-generation (5G) cellular systems due to the large available spectrum bandwidth. To make mmWave new radio (NR) a reality, tremendous efforts have been exerted from the industry and academia. Performance evaluation of mmWave NR is a mandatory step and the key to ensuring the success of mmWave 5G deployment. Over-the-air (OTA) radiated method of testing mmWave NR in laboratory conditions is highly attractive, since it facilitates virtual field testing of mmWave devices in realistic propagation conditions. In this paper, we first discuss the need for and challenges in OTA measurement of mmWave 5G NR under fading channel conditions. After that, two promising candidate solutions, i.e., wireless cable and multi-probe anechoic chamber (MPAC), are detailed. Their principles, applicability for mmWave NR, and main challenges are discussed. Furthermore, preliminary experimental validation results in a frequency range 2 anechoic chamber are demonstrated for the wireless cable and MPAC methods at 28 GHz.

Keywords：空间信道模型；空口测试；无线线缆；多探头电波暗室；FR2验证

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流追踪：一种软件定义网络中低开销的时延测量和路径追踪方法 Article

硕汪,娇张,韬黄,江刘,韵洁刘,F. Richard YU

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 2, Pages 206-219 doi: 10.1631/FITEE.1601280

Abstract: 此外，traceroute和ping依靠主动发送探测包来探测路径。然而，当负载均衡机制把探测包和所需追踪流的数据包均衡到不同路径时，这些工具将无法探测出流的真实转发路径，更无法测量出真实的路径时延。因此，为了准确的测量链路时延，测量工具必须能够提前找出数据包的真实转发路径。基于此发现，我们提出了一套新的软件定义网络中的流追踪机制“FlowTrace”，利用它来追踪任意流量的转发路径以及测量数据流所经历的链路时延。该工具通过收集交换机的流表来计算流的转发路径。在获得流的真实转发路径后，我们提出了一种新的测量方法来测量不同流的网络时延。最后，实验结果显示我们设计的方法可以准确的找出流的真实转发路径并测量出不同种类流所经历的时延。

Keywords：软件定义网络；网络检测；路径追踪

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Analytical delay estimation of coupled RLC interconnects under ramp input

Li Xin,Janet M Wang,Tang Weiqing,Wu Huizhong

Strategic Study of CAE 2008, Volume 10, Issue 11, Pages 59-64

Abstract:

The excitation in actual circuits is always nonideal, which has a definite impact on the analysis of interconnect delay. Considering the impact, the analytical delay model is proposed and the analytical delay method based on coupled RLC interconnect is presented. Then the decoupling method is improved and the coupled interconnects model under ramp input is decoupled when analyzing the interconnect segments. Finally the two-pole model is combined with the improved modified one-pole model to simplify the transfer function and the expression of delay of coupled interconnects is proposed. Experimental results demonstrate that the analysis method can evaluate the delay of coupled RLC interconnects effectively.

Keywords： ramp input coupled RLC interconnects delay decoupling two-pole model improved modified one-pole model

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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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Planar dual-polarized millimeter-wave shared-aperture array antenna with high band isolation Correspondence

Yuyan CAO, Zijun GUO, Zhangcheng HAO

Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 10, Pages 1568-1578 doi: 10.1631/FITEE.2200122

Abstract:

A planar millimeter-wave shared-aperture array antenna is proposed and designed in this paper. By composing the substrate integrated waveguide (SIW) and the stripline, the K-band antenna is embedded inside the Ka-band antenna to achieve a smaller size and a low profile by sharing an aperture. The Ka-band antenna radiates through the parallel slot pairs on the surface of the SIW cavities with horizontal polarization, while the K-band antenna radiates through the butterfly-shaped slots with vertical polarization, which are also designed on the surface. Then the two array antennas can radiate by sharing a common aperture with high isolation. To verify this idea, a prototype of an 8×8 shared-aperture array antenna has been designed with center frequencies of 19 and 30 GHz and fabricated using multilayer printed circuit board (PCB) technology. The measurement results show that the −10 dB impedance bandwidths in the K- and Ka-bands are 7.73% and >20%, and the corresponding isolations are higher than 60 and 44 dB, respectively. The proposed shared-aperture antenna has a small footprint, a low profile, and high isolation, and is a promising candidate to design compact millimeterwave wireless systems.

Keywords：共口径；平面天线；高隔离度；基片集成波导

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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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Passive millimeter-wave target recognition based on Laplacian eigenmaps

Luo Lei,Li Yuehua,Luan Yinghong

Strategic Study of CAE 2010, Volume 12, Issue 3, Pages 77-81

Abstract:

Aiming at the disadvantages of feature extraction and selection in the traditional method for passive millimeter-wave (MMW) metal target recognition, the existence and characteristics of low dimensional manifold of the short-time Fourier spectrum of metal target echo signal are explored using manifold learning algorithm, Laplacian eigenmaps. Target classification is performed through comparing the similarity of the test samples and the positive class in terms of the low dimensional manifold. The experiments show that the method gets higher recognition rate than other linear and kernel-based nonlinear dimensionality reduction algorithm, and is robust to data aliasing.

Keywords： manifold learning Laplacian eigenmaps nonlinear dimensionality reduction low dimensional manifold MMW

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High linearity U-band power amplifier design: a novel intermodulation point analysis method Research Article

Jie CUI, Peipei LI, Weixing SHENG,cuijie@njust.edu.cn

Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 1, Pages 176-186 doi: 10.1631/FITEE.2200082

Abstract: A ’s linearity determines the emission signal’s quality and the efficiency of the system. Nonlinear distortion can result in system bit error, out-of-band radiation, and interference with other channels, which severely influence communication system’s quality and reliability. Starting from the third-order intermodulation point of the s, the circuit’s nonlinearity is compensated for. The analysis, design, and implementation of linear class AB mm-Wave s based on GlobalFoundries 45 nm technology are presented. Three single-ended and differential stacked s have been implemented based on cascode cells and triple cascode cells operating in U-band frequencies. According to nonlinear analysis and on-wafer measurements, designs based on triple cascode cells outperform those based on cascode cells. Using single-ended measurements, the differential achieves a measured peak power-added efficiency (PAE) of 47.2% and a saturated output power () of 25.2 dBm at 44 GHz. The amplifier achieves a higher than 23 dBm and a maximum PAE higher than 25% in the measured bandwidth from 44 GHz to 50 GHz.

Keywords： CMOS silicon-on-insulator (SOI) Linearity analysis Milimeter wave (mm-Wave) Power amplifier

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Title Author Date Type Operation

Empirical study on directional millimeter-wave propagation in vehicle-to-infrastructure communications between road and roadside

Xichen Liu, Lin Yang, Daizhong Yu,362475709@qq.com,eelyang@uestc.edu.cn,15908107465@163.com

Journal Article

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

Sun Zhongliang,Dou Wenbin

Journal Article

A general altitude-dependent path loss model for UAV-to-ground millimeter-wave communications

Journal Article

The application of advanced threshold denoising tothe MMW target radiation signal

Fan Qinghui,Li Xingguo

Journal Article

OTFS modulation performance in a satellite-to-ground channel at sub-6-GHz and millimeter-wave bands with high mobility

Tianshi Li, Ruisi He, Bo Ai, Mi Yang, Zhangdui Zhong, Haoxiang Zhang,19125026@bjtu.edu.cn,ruisi.he@bjtu.edu.cn,boai@bjtu.edu.cn,17111030@bjtu.edu.cn,zhdzhong@bjtu.edu.cn,zhx61778294@126.com

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

Study on motion compensation method for MMW Chirp － SF radar

Wang Guili,Li Xingguo

Journal Article

Spatial fading channel emulation for over-the-air testing of millimeter-wave radios: concepts and experimental validations

Wei Fan, Lassi Hentilä, Pekka Kyösti,wfa@es.aau.dk

Journal Article

流追踪：一种软件定义网络中低开销的时延测量和路径追踪方法

硕汪,娇张,韬黄,江刘,韵洁刘,F. Richard YU