2021 Wireless Telecommunications Symposium (WTS)最新文献_第2页

Phase-Only Pattern Nulling of Planar Antenna Arrays in mmWave Communications 毫米波通信中平面天线阵列的纯相位方向图消零

2021 Wireless Telecommunications Symposium (WTS) Pub Date : 2021-04-21 DOI: 10.1109/WTS51064.2021.9433684

S. M. Aghajanzadeh, Ming Jian

引用次数: 0

Analysis of RSSI Feasibility for Sensor Positioning in Exterior Environment 外部环境下RSSI传感器定位的可行性分析

2021 Wireless Telecommunications Symposium (WTS) Pub Date : 2021-04-21 DOI: 10.1109/WTS51064.2021.9433708

Qian Dong, F. Zhu, Yanning Cai, Liangda Fang, Mi Lu

{"title":"Analysis of RSSI Feasibility for Sensor Positioning in Exterior Environment","authors":"Qian Dong, F. Zhu, Yanning Cai, Liangda Fang, Mi Lu","doi":"10.1109/WTS51064.2021.9433708","DOIUrl":"https://doi.org/10.1109/WTS51064.2021.9433708","url":null,"abstract":"Mobility of nodes in Wireless Sensor Networks (WSNs) brings formidable challenges to protocol design. A mobility estimation algorithm is the prerequisite for evaluating link quality, localizing nodes and excogitating a signal threshold to trigger possible handoff. The radio Received Signal Strength Indicator (RSSI) integrated in sensors has been widely used due to its low economy cost and moderate energy consumption. The distance of separation between adjacent nodes can be estimated by reading RSSI when a good portion of electromagnetic wave propagates in a line-of-sight link. However, the measurement results of RSSI fluctuate heavily because of fading signal and disturbing background noise. This paper investigates the reliability of RSSI for exterior sensor positioning. To display the one-to-one mapping between RSSI and distance, a series of static experiments are conducted and a reference curve is established. To mitigate the fluctuation of raw RSSI samples, a set of mobile experiments are carried out and five filtering methods are employed. The mitigation effects are evaluated by the Root Mean Square Error (RMSE) values. Though the overall optimal RMSE achieves 0.84, which is significantly lower than that of the raw samples, it is still possible that one RSSI corresponds to two or more distances, and the maximum difference between them can reach 2.97 meters. Because this error is intolerable for many applications, it is not authentic to gauge the distance between mobile nodes only based on RSSI in exterior environment.","PeriodicalId":443112,"journal":{"name":"2021 Wireless Telecommunications Symposium (WTS)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128437430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

A Multimode FPGA-based Modem with Embedded Σ-Δ Analog-to-Digital Converter for Software Defined Radio 基于fpga的多模调制解调器与嵌入式Σ-Δ模数转换器的软件无线电

2021 Wireless Telecommunications Symposium (WTS) Pub Date : 2021-04-21 DOI: 10.1109/WTS51064.2021.9433678

J. G. D. Junior, F. A. Brito-Filho

引用次数: 1

Considering Sync Word and Header Error Rates for Performance Assessment in LoRa System 基于同步字和报头错误率的LoRa系统性能评估

2021 Wireless Telecommunications Symposium (WTS) Pub Date : 2021-04-21 DOI: 10.1109/WTS51064.2021.9433676

V. Savaux, C. Delacourt, Patrick Savelli

引用次数: 2

Efficient Data Gathering from Passive Wireless Sensor Networks 无源无线传感器网络的高效数据采集

2021 Wireless Telecommunications Symposium (WTS) Pub Date : 2021-04-21 DOI: 10.1109/WTS51064.2021.9433681

Naor Zohar

{"title":"Efficient Data Gathering from Passive Wireless Sensor Networks","authors":"Naor Zohar","doi":"10.1109/WTS51064.2021.9433681","DOIUrl":"https://doi.org/10.1109/WTS51064.2021.9433681","url":null,"abstract":"This study suggests using a user-initiated data gathering from power-limited and even passive wireless sensor networks (WSNs), that either power limitation or poor cellular coverage prevents them from communicating directly with wireless networks. While previous studies focused on WSNs that continuously transmit their data, the focus of this study is on passive WSNs. The key idea is that instead of receiving the data transmitted by the WSN, an external device (a reader), such as an unnamed aerial vehicle (UAV), or a smartphone is used to read the data stored in the sensor nodes, and then to deliver it to the cloud, in which it is stored and processed. The focus of this study is on the rate at which the passive sensor nodes should be polled. That is, to find the minimal monitoring rate that still guarantees accurate and reliable data collection.The proposed scheme enables us to deploy wireless sensor networks over a large geographic area (e.g., for agricultural applications), in which the cellular coverage is very poor if any. Furthermore, the usage of initiated data collection can enable the deployment of passive WSNs. Thus, can significantly reduce both the operational cost, as well as the deployment cost, of the WSN.","PeriodicalId":443112,"journal":{"name":"2021 Wireless Telecommunications Symposium (WTS)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131480932","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Low Complexity PIC-MMSE Detector for LDS Systems over Frequency-Selective Channels 用于频率选择信道LDS系统的低复杂度PIC-MMSE检测器

2021 Wireless Telecommunications Symposium (WTS) Pub Date : 2021-04-21 DOI: 10.1109/WTS51064.2021.9433713

Mitchell Fantuz, Michel Kulhandjian, C. D’amours

引用次数: 0

Medium Access Strategies for Integrated Access and Backhaul at mmWaves Unlicensed Spectrum 毫米波非授权频谱综合接入和回程的介质接入策略

2021 Wireless Telecommunications Symposium (WTS) Pub Date : 2021-03-23 DOI: 10.1109/WTS51064.2021.9433686

B. Sahoo, S. Swain, Hung-Yu Wei, M. Sarkar

引用次数: 3

Cooperation-Assisted Spectrum Handover Mechanism in Vehicular Ad Hoc Networks 车载Ad Hoc网络中协同辅助频谱切换机制

2021 Wireless Telecommunications Symposium (WTS) Pub Date : 2021-03-21 DOI: 10.1109/WTS51064.2021.9433677

Ming-Chin Chuang

{"title":"Cooperation-Assisted Spectrum Handover Mechanism in Vehicular Ad Hoc Networks","authors":"Ming-Chin Chuang","doi":"10.1109/WTS51064.2021.9433677","DOIUrl":"https://doi.org/10.1109/WTS51064.2021.9433677","url":null,"abstract":"Due to the rapid development of wireless network technology, a variety of application services have been proposed. Recently, the Internet-of-vehicles (IoV) has received lots of attention from industry, government, academics and research units. Unfortunately, the wireless spectrum resources are very limited. There are some problems in vehicle ad hoc networks (VANETs), such as channel interference, competition and waste of wireless spectrum. Although cognitive radio technology has been proposed to improve spectrum utilization, there are still many issues that need to be addressed. For example, when a vehicle hands over the base stations (BSs), the issue of the spectrum handover needs to be considered. The network performance gets worse as the vehicle moves faster. Therefore, this paper proposes a cooperation-assisted spectrum handover (CASH) scheme. In CASH, each vehicle uses cognitive radio technology to collect the surrounding spectrum information, exchanges information by vehicle-to-vehicle collaboration technology and then executes a pre-scan mechanism to improve performance. We hope that the proposed method can reduce the delay time of the spectrum handover and improve the spectrum utilization. Finally, the simulation results show that our proposed method outperforms other existing schemes. In spectrum utilization, CASH is about 25% better than that of the traditional method. In average scan time, the time of CASH is about 5 times less than the time of the traditional full scan method.","PeriodicalId":443112,"journal":{"name":"2021 Wireless Telecommunications Symposium (WTS)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129326601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simple Asymptotic BER Expressions for LoRa System over Rice and Rayleigh Channels Rice和Rayleigh信道上LoRa系统的简单渐近BER表达式

2021 Wireless Telecommunications Symposium (WTS) Pub Date : 2020-10-10 DOI: 10.1109/WTS51064.2021.9433680

V. Savaux, G. Ferré

引用次数: 9

WTS 2021 Cover Page WTS 2021封面

2021 Wireless Telecommunications Symposium (WTS) Pub Date : 1900-01-01 DOI: 10.1109/wts51064.2021.9433687

引用次数: 0