- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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[IEEE 2019 IEEE 8th Global Conference on Consumer Electronics (GCCE) - Osaka, Japan (2019.10.15-2019.10.18)] 2019 IEEE 8th Global Conference on Consumer Electronics (GCCE) - Bluetooth Based Wireless Control for iBeacon and VLC Enabled Lighting
摘要： This letter presents a probabilistic omnidirectional millimeter-wave path loss model based on real-world 28 GHz and 73 GHz measurements collected in New York City. The probabilistic path loss approach uses a free space line-of-sight propagation model, and for non-line-of-sight conditions uses either a close-in free space reference distance path loss model or a floating-intercept path loss model. The probabilistic model employs a weighting function that specifies the line-of-sight probability for a given transmitter-receiver separation distance. Results show that the probabilistic path loss model offers virtually identical results whether one uses a non-line-of-sight close-in free space reference distance path loss model, with a reference distance of 1 meter, or a floating-intercept path loss model. This letter also shows that site-specific environmental information may be used to yield the probabilistic weighting function for choosing between line-of-sight and non-line-of-sight conditions.
关键词： mmWave,ray-tracing,probabilistic path loss,floating-intercept,close-in free space reference distance,site-specific
更新于2025-09-23 15:19:57
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[IEEE ICASSP 2018 - 2018 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) - Calgary, AB (2018.4.15-2018.4.20)] 2018 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) - Dithered Beamforming for Channel Estimation in Mmwave-Based Massive Mimo
摘要： In this work we consider the challenging problem of channel estimation at the receiver of a massive multiple-input multiple-output system with hybrid analog/digital beamforming and low-resolution quantization. We propose a dithered beamforming architecture, where random control signals are injected to the analog part of the receiver beamformer and to the analog-to-digital converters to introduce randomness into the signal capturing process and combat the stair-case quantization effects. The statistical properties of the dithered output are captured via an Expectation-Maximization approximation of the maximum a-posteriori estimator. A low-complexity algorithm is proposed which exhibits performance close to the oracle-based least-squares estimation of the sparse channel.
关键词： low resolution analog-to-digital converter (ADC),hybrid analog/digital beamforming,millimeter wave (mmWave) massive MIMO
更新于2025-09-23 15:19:57
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Low-Complexity Multiuser Receiver for Massive Hybrid Array mmWave Communications
摘要： In this paper, we study the low complexity reception of multiuser signals in uplink millimeter wave (mmWave) communications using a partially connected hybrid antenna array. Exploiting the mmWave channel property, we propose a low-complexity user-directed multiuser receiver with three novel schemes for allocating subarrays to users. This receiver only requires the knowledge of angles-of-arrival (AoAs) for dominating paths and a small amount of equivalent channel information instead of perfect channel state information. For comparison, we also derive a successive interference cancellation based solution as a performance benchmark. We design two types of reference signals with the channel estimation method to enable efficient and simple estimation for AoA and equivalent baseband channel. Also, we provide analytical results for the performance of AoA estimation, using the lower bounds of mean square errors in line-of-sight dominated mmWave channels. Simulation results validate that the proposed channel estimation method is effective when employed in combination with a zero-forcing equalizer.
关键词： mmWave communications,subarray,angle-of-arrival estimation,Hybrid antenna array,line-of-sight
更新于2025-09-19 17:15:36
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[IEEE 2019 International Conference on Electromagnetics in Advanced Applications (ICEAA) - Granada, Spain (2019.9.9-2019.9.13)] 2019 International Conference on Electromagnetics in Advanced Applications (ICEAA) - mmWave Array Antenna based on Gap Waveguide Technology for 5G Applications
摘要： The gap waveguide technology has been shown to provide low loss and easy-to-manufacture antenna solutions in the mmWave frequencies. A gap waveguide array antenna with scanning ability within ±45? designed with focus on 5G applications is presented here. The computed active re?ection coef?cient of the array is less than ?10 dB for all scan angles and the broadside gain is 23 dBi. The proposed antenna can be integrated with active components to increase EIRP and coverage range.
关键词： mmWave,array antenna,gap waveguide,5G applications
更新于2025-09-16 10:30:52
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[IEEE 2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting - Atlanta, GA, USA (2019.7.7-2019.7.12)] 2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting - Broadband mmWave Splitters Based on Dielectric Waveguides
摘要： In this contribution, we are presenting mmWave signal splitters with equal and unequal splitting ratios. Based on a dielectric waveguide concept, the proposed components are cost effective, easy producible, and suitable for ultra broadband operation. Next to fundamental considerations, we are presenting 3D-EM simulations and measurement results of manufactured splitters that show excellent properties within the frequency range from 70 to 90 GHz.
关键词： dielectric waveguide,signal splitters,broadband operation,mmWave
更新于2025-09-16 10:30:52
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[IEEE 2019 16th China International Forum on Solid State Lighting & 2019 International Forum on Wide Bandgap Semiconductors China (SSLChina: IFWS) - Shenzhen, China (2019.11.25-2019.11.27)] 2019 16th China International Forum on Solid State Lighting & 2019 International Forum on Wide Bandgap Semiconductors China (SSLChina: IFWS) - High color rendering index white LEDs fabricated using InP/ZnS green-emitting quantum dots and InP/ZnSe/ZnS red-emitting quantum dots
摘要： This paper presents a 3-D statistical channel impulse response (IR) model for urban line of sight (LOS) and non-LOS channels developed from 28- and 73-GHz ultrawideband propagation measurements in New York City, useful in the design of 5G wireless systems that will operate in both the ultra-high frequency/microwave and millimeter-wave (mmWave) spectrum to increase channel capacities. A 3GPP-like stochastic IR channel model is developed from measured power delay profiles, angle of departure, and angle of arrival power spectra. The extracted statistics are used to implement a channel model and simulator capable of generating 3-D mmWave temporal and spatial channel parameters for arbitrary mmWave carrier frequency, signal bandwidth, and antenna beamwidth. The model presented here faithfully reproduces realistic IRs of measured urban channels, supporting air interface design of mmWave transceivers, filters, and multi-element antenna arrays.
关键词： 5G,28 GHz,3-D ray-tracing,multipath,time cluster (TC),spatial lobe (SL),millimeter-wave (mmWave) propagation,statistical simulator,spatial channel model (SCM),time cluster spatial lobe (TCSL),Channel model,impulse response (IR),73 GHz
更新于2025-09-16 10:30:52
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[IEEE 2019 IEEE 2nd 5G World Forum (5GWF) - Dresden, Germany (2019.9.30-2019.10.2)] 2019 IEEE 2nd 5G World Forum (5GWF) - The Optical Fiber and mmWave Wireless Convergence for 5G Fronthaul Networks
摘要： In this paper, we have addressed and reported the principal technologies part of the next generation mobile fronthauling networks, namely 5G fronthaul. We also described the main features of these technologies and illustrated their benefit via current and challenging bottleneck network conditions by involving real world scenarios with high demand for innovative solutions. These technologies (such as ribbon optical fibers, RoF, passive WDM, mmWaves) will be most likely implemented in the 5G fronthaul infrastructure. Among these technologies, several technical challenges remain to be addressed such as cost-efficient hardware solutions for RoF transceivers, simple adaptation of RoF techniques over ribbon fibers, optical beamforming in integrated photonics, seamless interfaces between the ribbon fiber media and the radiating elements in the RU sites, and finally remote power distribution to RUs from CO premises.
关键词： 5G,fronthaul,mmWave,RoF,ribbon fibers,WDM,C-RAN
更新于2025-09-11 14:15:04
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[IEEE 2019 IEEE Photonics Conference (IPC) - San Antonio, TX, USA (2019.9.29-2019.10.3)] 2019 IEEE Photonics Conference (IPC) - Optical Fiber in Wireless Networks: From Radio-over-Fiber DAS to 5G RAN
摘要： We review the role of optical fiber as a transport medium in the three generations of in-building wireless networks. We show that fiber becomes a necessity for 5G radio access networks (RAN) operating in high-bandwidth regions of the spectrum at millimeter wave (mmWave) frequencies.
关键词： 5G Radio Access Networks,mmWave communications,Distributed antenna systems,indoor wireless networks
更新于2025-09-11 14:15:04
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Low-Complexity Failed Element Diagnosis for Radar-Communication mmWave Antenna Array with Low SNR
摘要： The millimeter-wave (mmWave) antenna array plays an important role in the excellent performance of wireless sensors networks (WSN) or unmanned aerial vehicle (UAV) clusters. However, the array elements are easily damaged in its harsh working environment but hard to be repaired or exchanged timely, resulting in a serious decline in the beamforming performance. Thus, accurate self-diagnosis of the failed elements is of great importance. In previous studies, there are still significant difficulties for large-scale arrays under extremely low SNR. In this paper, a diagnosis algorithm with low complexity and high reliability for the failed elements is proposed, which is based on a joint decision of communication signal and sensing echoes. Compared with the previous studies, the complexity of the algorithm is reduced by the construction of low-dimensional feature vectors for classification, the decoupling of the degree of arrival (DOA) estimation and the failed pattern diagnosis, with the help of the sub-array division. Simulation results show that, under an ultra-low SNR of ?12.5 dB for communication signals and ?16 dB for sensing echoes, an accurate self-diagnosis with a block error rate lower than 8% can be realized. The study in this paper will effectively promote the long-term and reliable operation of the mmWave antenna array in WSN, UAV clusters and other similar fields.
关键词： low SNR,low complexity,joint radar-communication system,mmWave antenna array,failed elements diagnosis
更新于2025-09-11 14:15:04
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[IEEE 2019 16th International Symposium on Wireless Communication Systems (ISWCS) - Oulu, Finland (2019.8.27-2019.8.30)] 2019 16th International Symposium on Wireless Communication Systems (ISWCS) - A Differential Reflection-Type Phase Shifter Based on CPW Coupled-Line Coupler in 45nm CMOS SOI
摘要： This paper presents a mm-wave fully differential coplanar waveguide (CPW) vertically-coupled lines coupler and a reflection type phase shifter (RTPS) based on the proposed coupler. The use of grounded strip line structure for vertical coupling in CPW based coupler provides not only the improved coupling properties than the edge coupling but also provides the opportunity of using surrounding area efficiently to reduce area. The proposed coupler and phase shifter are designed and fabricated in 45nm CMOS SOI technology. Measured insertion loss of the coupler is ~ 6 dB from 18 to 43 GHz. A digitally controlled parallel LC load is used for controlling the phase of the phase shifter. Measured phase tuning range is 115 degrees, with insertion loss variation of 4.5 to 9 dB, for a frequency range of 39 GHz to 45 GHz. Total drawn area of the phase shifter is 0.214 mm2. The area of the proposed RTPS is smaller than the recently published state-of-the-art structures.
关键词： 5G,mmWave,Phased Array,Hybrid Coupler,Phase shifter,CMOS SOI
更新于2025-09-11 14:15:04