{"title":"Millimeter-wave to microwave MIMO relays (M4R) for 5G building penetration communications","authors":"Rui Zhu, Y. Wang, Qiang Xu, Yaozhong Liu, Y. Li","doi":"10.1109/RWS.2018.8304988","DOIUrl":"https://doi.org/10.1109/RWS.2018.8304988","url":null,"abstract":"5G communication systems promise high data rates over Gbits/S and minimum delay in data transfer. Millimeter wave band, due to its abundant spectrum that is available, is considered to be the key enabling technique for such links. However, the high propagation loss and poor penetration through obstacles of electromagnetic waves at millimeter wave (mmWave) makes it difficult for outdoor-to-indoor communication. On the other hand, signals in the microwave band can easily penetrate through buildings, but its single channel capacity is limited by the narrow available bandwidth. In this article, we propose a new method of mmWave to microwave MIMO relay (M4R) which combines the broad bandwidth of mmWave link and the better penetration and the more abundant spatial channels in the microwave band to form high speed wireless links. The essential idea is to use frequency translational relay units in RF to connect frequency multiplexing mmWave channels and MIMO microwave channels to realize seamless pathway of information flow and avoid bottleneck in data traffic. System principle and link budget of M4R is discussed in this article and shows that M4R may significantly improve the link performance and maximize the channel capacity for high speed outdoor to indoor communications.","PeriodicalId":170594,"journal":{"name":"2018 IEEE Radio and Wireless Symposium (RWS)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129180926","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}
Jing Wang, Yao Tang, J. Muñoz-Ferreras, R. Gómez‐García, Changzhi Li
{"title":"An improved indoor localization solution using a hybrid UWB-Doppler system with Kalman filter","authors":"Jing Wang, Yao Tang, J. Muñoz-Ferreras, R. Gómez‐García, Changzhi Li","doi":"10.1109/RWS.2018.8304980","DOIUrl":"https://doi.org/10.1109/RWS.2018.8304980","url":null,"abstract":"Ultra-wideband (UWB) positioning system has gained much attention in the field of indoor localization due to its various advantages. The narrow pulse nature of UWB signal results in a very large bandwidth which enables high resolution positioning, low loss penetration, and low cost. However, practically, the low transmit power severely restrains the transmission range of UWB signal so that it is only suitable for short-range accurate ranging. Therefore, a novel hybrid UWB-Doppler system was proposed by using a fixed UWB positioning system monitored region to calibrate the accumulated error of a Doppler-gyroscope trajectory-tracking system. In this paper, we present improved indoor localization performance using the hybrid UWB-Doppler system employing the Kalman Filter. Experiments were conducted in a large complex indoor environment to further demonstrate the feasibility of the proposed indoor localization method.","PeriodicalId":170594,"journal":{"name":"2018 IEEE Radio and Wireless Symposium (RWS)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113973819","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}
{"title":"Small wearable antennas for wireless communication and medical systems","authors":"A. Sabban","doi":"10.1109/RWS.2018.8304974","DOIUrl":"https://doi.org/10.1109/RWS.2018.8304974","url":null,"abstract":"Wearable communication industry is in rapid growth in the last decade. Small antennas are crucial in the development of wearable wireless communications systems. Low efficiency is the major disadvantage of small antennas. Novel technologies, such as Meta material and fractal antennas, are used to improve the efficiency of small antennas. New wearable meta-materials and fractal antennas with high efficiency are presented in this paper. All antennas were analyzed by using 3D full-wave software. The antennas electrical parameters on the human body are presented. The gain and directivity of a the antenna with Split-ring resonators, SRR, is higher by 2.5dB than the patch antenna without SRR. The resonant frequency of the antennas with SRR is lower by 5% to 10% than the antennas without SRR. Fractal antennas are very compact, multiband, and have useful applications in wireless communication system. Wide band wearable slot antennas, bandwidth of 57% for VSWR better than 2:1, are also presented.","PeriodicalId":170594,"journal":{"name":"2018 IEEE Radio and Wireless Symposium (RWS)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121601060","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}
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