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| 1 | Key techniques for 5G wireless communications:network architecture, physical layer,and MAC layer perspectives显示文摘The fourth generation(4G) mobile communication systems are offering service worldwide steadily.Although 4G systems could be loaded with much more services and data than previous systems, there is still a dramatic gap between the people's practical requirements and what can be offered by the 4G technologies.Consequently, the research and development for the fifth generation(5G) systems have already been started. This article presents an overview of potential network architecture and highlights several promising techniques which could be employed in the future 5G systems. These techniques include non-orthogonal multiple access(NOMA),massive multiple input and multiple output(MIMO), cooperative communications and network coding, full duplex(FD), device-to-device(D2D) communications, millimeter wave communications, automated network organization, cognitive radio(CR), and green communications. The state-of-art and implementation issue of these techniques are also addressed. | MA Zheng ZHANG ZhengQuan DING ZhiGuo FAN PingZhi LI HengChao | 2015 | Science China(Information Sciences)2015，58，4： | 49 |
| 2 | Lower bounds on the periodic Hamming correlations of frequency hopping sequences with low hit zone显示文摘In this paper, several periodic Hamming correlation lower bounds for frequency hopping sequences with low hit zone, with respect to the size p of the frequency slot set, the sequence length L, the family size M, low hit zone LH ( or no hit zone NH ), the maximum periodic Hamming autocorrelation sidelobe Ha and the maximum periodic Hamming crosscorrelation Hc, are established. It is shown that the new bounds include the known Lempel-Greenberger bounds, T.S. Seay bounds and Peng-Fan bounds for the conventional frequency hopping sequences as special cases. | PENG Daiyuan FAN Pingzhi LEE Moon Ho | 2006 | Science in China(Series F)2006，49，2： | 27 |
| 3 | 5G High Mobility Wireless Communications: Challenges and Solutions显示文摘The fifth generation(5G) network is expected to support significantly large amount of mobile data traffic and huge number of wireless connections,to achieve better spectrum- and energy-efficiency,as well as quality of service(QoS) in terms of delay,reliability and security.Furthermore,the 5G network shall also incorporate high mobility requirements as an integral part,providing satisfactory service to users travelling at a speed up to 500 km/h.This paper provides a survey of potential high mobility wireless communication(HMWC) techniques for 5G network.After discussing the typical requirements and challenges of HMWC,key techniques to cope with the challenges are reviewed,including transmission techniques under the fast timevarying channels,network architecture with mobility support,and mobility management.Finally,future research directions on 5G high mobility communications are given. | Pingzhi Fan Jing Zhao Chih-Lin I | 2016 | China Communications2016，13，S2： | 16 |
| 4 | CONSTRUCTION OF FREQUENCY HOPPING SEQUENCES WITH NO HIT ZONE显示文摘In this paper,a property of Frequency Hopping (FH) sequence set with No Hit Zone (NHZ) is analyzed. Based on matrix transform and mapping methods,respectively,two classes of NHZ FH sequences are presented. These NHZ FH sequences have good Hamming auto-correlation and Hamming cross-correlation properties. FH Code-Division Multiple Access (FH-CDMA) communication systems employing such NHZ FH sequences will eliminate multiple-access interference if the maximum time delay is shorter than the length of the NHZ. | Ye Wenxia Fan Pingzhi | 2007 | Journal of Electronics(China)2007，24，3： | 8 |
| 5 | Position-assisted fast handover schemes for LTE-advanced network under high mobility scenarios显示文摘Two position-assisted fast handover schemes, scheme A and scheme B, for LTE-A system under very high mobility scenarios, are proposed, together with their performance evaluation. Scheme A is designed to reduce handover delay by making handover preparation before handover starts. Scheme B aims at reducing unnecessary handovers and improving handover success rate, by calculating the geographically best target handover cell, which makes it easier for mobile terminals to access the target cell. A system level simulation is conducted to evaluate the performance of these two schemes. It is shown that, scheme A could reduce inter-site handover delay by about 50 ms, while scheme B could cut down nearly 50% of all handovers when time-to-trigger (TTT) is 0 ms. Besides, as TTT gets larger, Scheme B has much better success rate. | Ming FEI Pingzhi FAN | 2012 | Journal of Modern Transportation2012，20，4： | 4 |
| 6 | A Survey on Low Complexity Detectors for OTFS Systems显示文摘The newly emerging orthogonal time frequency space(OTFS)modulation can ob⁃tain delay-Doppler diversity gain to significantly improve the system performance in high mobility wireless communication scenarios such as vehicle-to-everything(V2X),high-speed railway and unmanned aerial vehicles(UAV),by employing inverse symplectic finite Fouri⁃er transform(ISFFT)and symplectic finite Fourier transform(SFFT).However,OTFS modu⁃lation will dramatically increase system complexity,especially at the receiver side.Thus,de⁃signing low complexity OTFS receiver is a key issue for OTFS modulation to be adopted by new-generation wireless communication systems.In this paper,we review low complexity OTFS detectors and provide some insights on future researches.We firstly present the OTFS system model and basic principles,followed by an overview of OTFS detector structures,classifications and comparative discussion.We also survey the principles of OTFS detection algorithms.Furthermore,we discuss the design of hybrid OTFS and orthogonal frequency di⁃vision multiplexing(OFDM)detectors in single user and multi-user multi-waveform commu⁃nication systems.Finally,we address the main challenges in designing low complexity OT⁃FS detectors and identify some future research directions. | ZHANG Zhengquan LIU Heng WANG Qianli FAN Pingzhi | 2021 | ZTE Communications2021，19，4： | 3 |
| 7 | A Multi-Hop Moving Zone(MMZ) Clustering Scheme Based on Cellular-V2X显示文摘A clustering scheme based on pure V2V communications has two prominent issues i.e. broadcast storm and network disconnection. The application of the fifth generation(5G) technology to vehicular networks is an optimal choice due to its wide coverage and low latency features. In this paper, a Multihop Moving Zone(MMZ) clustering scheme is proposed by combining IEEE 802.11p with the 3rd Generation Partnership Project(3GPP) 5G cellular technology. In MMZ, vehicles are clustered up-to three hops using V2V communications based on IEEE 802.11 p aiming to reduce excessive cellular hand-off cost. While the zonal heads(ZHs) i.e. cluster heads(CHs) are selected by cellular-V2X(C-V2X) on the basis of multi-metrics i.e. relative speed, distance and link life time(LLT). The main goal of MMZ is to form stable clusters achieving high packet delivery and low latency. The simulation results using ns3 show that, 5G wide range technology significantly improves the stability of MMZ in term of ZH duration and change rate. The average Data Packet Delivery Ratio(DPDR) and E2E latency are also improved as compared to the existing clustering schemes. | Zahid Khan Pingzhi Fan | 2018 | China Communications2018，15，7： | 3 |
| 8 | CHANNEL DE-ALLOCATION SCHEMES FOR GSM/GPRS NETWORKS显示文摘Several channel de-allocation schemes for GSM/GPRS(General Packet Radio Service) networks are proposed in this paper. For DRA (Dynamical Resource Allocation) with de-allocation mechanism, if a new voice call arrives and finds that all the channels are busy,then one of the GPRS packets which occupy more than one channel for data transmission may release a channel for the new voice call. This paper presents 5 de-allocation mechanisms, i.e.DA-RANDOM, DA-RICHEST, DA-POOREST, DA-OLDEST and DA-YOUNGEST, to select the GPRS packet for releasing the appropriate channel. Simulation results show that DAOLDEST achieves the best performance, especially in packets blocking probability, among all the de-allocation schemes. Although the performance of the proposed de-allocation schemes is not significantly different, they are all much better than that of the scheme without de-allocation. | Jiang Tigang Fan Pingzhi Kam Yiu Lam | 2005 | Journal of Electronics(China)2005，22，6： | 3 |
| 9 | Guest editorial: special issue on high mobility wireless communications显示文摘The high-speed railway and high-way networks are now expanding at a phenomenal speed in China and in many other parts of the world. The related broadband wireless communication over high-speed trains and highway vehicles is a very challenging task due to hostile transmission channel conditions. The demand for such services is growing rapidly, following the proliferation of laptop/tablet computers and | Pingzhi FAN Erdal PANAYIRCI Ping LI Chengxiang WANG Vahid TAROKH | 2012 | Journal of Modern Transportation2012，20，4： | 2 |
| 10 | Advances in broadband wireless communications under high-mobility scenarios显示文摘未来活动通讯系统瞄准提供很高的数据传播率,甚至在象高速度的车轮轨道火车,磁悬浮火车火车,高速公路车辆,飞机,指导导弹或太空船那样的高活动性的情形。一个特别地重要的商业应用程序是对高速度的宽带的强壮、增加的世界范围的要求无线通讯(多达 574.8 ? km/h 测试速度或 380 ? km/h 广告速度)为象为旅客的机载的娱乐服务那样的应用程序在铁路,提供的数据,声音和录像满足,火车控制,训练派遣,火车传感器地位处理和监视。在如此的高活动性的情形,有很多通讯挑战,包括快移交,更新的地点,当模特儿的高速度的隧道,评价和均等, anti-Doppler 传播技术,快力量控制,和奉献网络建筑学。因为在很高速度的情形的信号传播将不可避免地经历 s …… | Pingzhi Fan | 2014 | Chinese Science Bulletin2014，59，35： | 2 |
| 11 | Coping with the Big Data:Convergence of Communications,Computing and Storage显示文摘To cope with the impact of big data,it is proposed to integrate the traditionally individual computing,communications and storage systems,which are getting inevitably converged.An effective information system capacity is introduced and discussed,aimed at excavating potentials of information system under a new paradigm with more degrees of freedom. | Pingzhi Fan | 2016 | China Communications2016，13，9： | 2 |
| 12 | New Delay Doppler Communication Paradigm in 6G Era:A Survey of Orthogonal Time Frequency Space(OTFS)显示文摘In the 6G era,Space-Air-Ground Integrated Network(SAGIN)are anticipated to deliver global coverage,necessitating support for a diverse array of emerging applications in high-mobility,hostile environments.Under such conditions,conventional orthogonal frequency division multiplexing(OFDM)modulation,widely employed in cellular and Wi-Fi communication systems,experiences performance degradation due to significant Doppler shifts.To overcome this obstacle,a novel twodimensional(2D)modulation approach,namely orthogonal time frequency space(OTFS),has emerged as a key enabler for future high-mobility use cases.Distinctively,OTFS modulates information within the delay-Doppler(DD)domain,as opposed to the timefrequency(TF)domain utilized by OFDM.This offers advantages such as Doppler and delay resilience,reduced signaling latency,a lower peak-to-average ratio(PAPR),and a reduced-complexity implementation.Recent studies further indicate that the direct interplay between information and the physical world in the DD domain positions OTFS as a promising waveform for achieving integrated sensing and communications(ISAC).In this article,we present an in-depth review of OTFS technology in the context of the 6G era,encompassing fundamentals,recent advancements,and future directions.Our objective is to provide a helpful resource for researchers engaged in the field of OTFS. | Weijie Yuan Shuangyang Li Zhiqiang Wei Yuanhao Cui Jiamo Jiang Haijun Zhang Pingzhi Fan | 2023 | China Communications2023，20，6： | 2 |
| 13 | Multiple symbols soft-decision metrics for coded frequency-shift keying signals显示文摘This paper derives a novel multiple symbols soft-decision metrics for frequency-shift keying signals which are affected by additive symmetric α -stable (S α S) noise and fading. The approximate metric, which is for the case where channel state information (phases, amplitudes, and noise dispersion parameter) is unknown is obtained based on a generalized-likelihood ratio (GLR) approach. The metric is obtained in closed form and proved to be effective. The performances of the multiple symbols soft-decision metrics are compared numerically for a turbo-coded system. The proposed multiple symbols metric provides substantial improvement over earlier single-symbol metrics. | MA Zheng PERSSON Danie LARSSON Erik G. FAN PingZhi | 2013 | Science China(Information Sciences)2013，56，2： | 2 |
| 14 | Spreadingsequence Set with zero Correlation Zone显示文摘 | DENG Xinmin FAN Pingzhi | 2000 | Electronlett2000，36，11： | 1 |
| 15 | Lower bounds on correlation of spreading sequence set with low or zero correlation zone 显示文摘 | TANG Xiaohu FAN Pingzhi Matsufuji S | 2000 | Electron Lett2000，36，6： | 1 |
| 16 | Bounds on aperiodic and odd correlations of spreading sequences with low and zero correlation zone 显示文摘 | FAN Pingzhi TANG Xiaohu | 2001 | Electron Lett2001，37，19： | 1 |
| 17 | A class of binary sequences with zero correlation zone显示文摘 | Fan Pingzhi Suehiro N Kuroyanagi N | 1999 | Electronics Letters1999，35，10： | 1 |
| 18 | Bounds on aperiodic and odd correlations of spreading sequences with low and zero correlation zone显示文摘 | Tang Xiaohu Fan Pingzhi | 2001 | Electronics Letters2001，37，19： | 1 |
| 19 | A class of binary sequences with zero correlation zone显示文摘 | Fan Pingzhi Suehiro N Kuroyanagi N | 1999 | IEEE Electron Lett1999，35，： | 1 |
| 20 | Bounds on aperiodic autocorrelation and crosscorrelation of binary LCZ/ZCZ sequences显示文摘 | PENG Daiyuan FAN Pingzhi NAOKI S | 2005 | IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences2005，88，12： | 1 |
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