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A time domain eigen value method for robust indoor localization 一种鲁棒室内定位的时域特征值方法
2010 Wireless Telecommunications Symposium (WTS) Pub Date : 2010-04-21 DOI: 10.1109/WTS.2010.5479664
G. Godaliyadda, H. K. Garg
{"title":"A time domain eigen value method for robust indoor localization","authors":"G. Godaliyadda, H. K. Garg","doi":"10.1109/WTS.2010.5479664","DOIUrl":"https://doi.org/10.1109/WTS.2010.5479664","url":null,"abstract":"The hazardous nature of the indoor environment and the rapid growth of commercial indoor positioning systems have placed a significant emphasis on developing robust localization techniques. Our work focuses on developing super resolution techniques that can provide accurate time delay estimates under line-of-sight (LOS) conditions and generation of location information rich fingerprints that can be utilized for localization under non LOS conditions. First a detailed behavioral analysis of the subspace separation based super resolution algorithms is presented. Then we examine the newly introduced time domain eigen-value (TD-EV) method which effectively combines the time domain multiple signal classification (TD-MUSIC) and the frequency domain eigen-value (FD-EV) algorithms. This is done to secure the bandwidth versatility, superior path resolvability, and noise immunity of TD-MUSIC algorithm and FD-EV's ability to resurface underestimated local peaks submerged beneath the noise floor under constrained conditions. This makes TD-EV a prime candidate for accurate time delay estimation under severe multi-path and noise conditions prevalent in indoor environments. Additionally, these attributes provide a location information rich fingerprint from the resultant pseudo-spectrum output of our method for location based fingerprinting techniques.","PeriodicalId":117027,"journal":{"name":"2010 Wireless Telecommunications Symposium (WTS)","volume":"46 Suppl 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115940802","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: 1
Effect of antennas correlation on the performance of MIMO systems in wireless sensor network 无线传感器网络中天线相关性对MIMO系统性能的影响
2010 Wireless Telecommunications Symposium (WTS) Pub Date : 2010-04-21 DOI: 10.1109/WTS.2010.5479667
C. Singh, S. Mohan
{"title":"Effect of antennas correlation on the performance of MIMO systems in wireless sensor network","authors":"C. Singh, S. Mohan","doi":"10.1109/WTS.2010.5479667","DOIUrl":"https://doi.org/10.1109/WTS.2010.5479667","url":null,"abstract":"Multiple-input multiple-output (MIMO) has been proved to be a path breaking technique for increasing capacity and reliability of a wireless communication system and has been adopted in most emerging wireless systems. To achieve the promised gain from MIMO, the antennas at transmitter or receiver are required to be separated by a minimum distance dependent on wavelength. Owing to the large physical size of traditional copper antennas, it is not possible to integrate them on tiny sensors with the required physical separation. The diversity technique if applied in wireless sensor network has potential to improve reliability as well as reduce power consumption. However, the traditional antennas are not suitable for placement on sensor nodes. This paper presents an analysis and performance results of MIMO with correlated antennas on sensor nodes of wireless sensor network.","PeriodicalId":117027,"journal":{"name":"2010 Wireless Telecommunications Symposium (WTS)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129667283","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: 5
RFID usage issues in the supply chain 供应链中的RFID使用问题
2010 Wireless Telecommunications Symposium (WTS) Pub Date : 2010-04-21 DOI: 10.1109/WTS.2010.5479669
B. Khoo
{"title":"RFID usage issues in the supply chain","authors":"B. Khoo","doi":"10.1109/WTS.2010.5479669","DOIUrl":"https://doi.org/10.1109/WTS.2010.5479669","url":null,"abstract":"Soon RFID technology will be universal for tracking items, products, animals, shipments and even humans. The pervasiveness of RFID technology has given rise to a number of serious issues including security and privacy concerns. This paper will discuss current RFID usage issues and conduct a threat analysis of the RFID usage in the SCM processes then identify issues/risks and discuss how these issues can be resolved or risks can be mitigated.","PeriodicalId":117027,"journal":{"name":"2010 Wireless Telecommunications Symposium (WTS)","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124300987","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
Low-complexity channel estimation for superimposed pilots in distributed OFDMA systems 分布式OFDMA系统中叠加导频的低复杂度信道估计
2010 Wireless Telecommunications Symposium (WTS) Pub Date : 2010-04-21 DOI: 10.1109/WTS.2010.5479650
Mikko Hiivala, I. Harjula, M. Lasanen
{"title":"Low-complexity channel estimation for superimposed pilots in distributed OFDMA systems","authors":"Mikko Hiivala, I. Harjula, M. Lasanen","doi":"10.1109/WTS.2010.5479650","DOIUrl":"https://doi.org/10.1109/WTS.2010.5479650","url":null,"abstract":"In multiple-input multiple-output (MIMO) systems, the requirement for orthogonal pilot sets grows linearly with the number of transmit antennas. The channel estimators based on multiplexed pilot subcarriers used in the current systems such as WiMAX and LTE consume bandwidth allocated for data transmission. An alternative approach based on superimposing the pilots onto the data subcarriers offers a good solution for channel estimation in systems where the maximum data rate can not be sacrificed for the cost of channel estimation accuracy. The concept of using superimposed pilots for channel estimation in a distributed multiple antenna transmission system is studied here with simple and low-complexity algorithms suitable for hardware implementation. The complexity and performance of the system are compared with a conventional multiplexed pilot system. The bit error rate (BER) simulation results demonstrate that superimposed pilots can be used to achieve tolerable performance in adaptive high-data rate systems with up to four transmitting antennas.","PeriodicalId":117027,"journal":{"name":"2010 Wireless Telecommunications Symposium (WTS)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121551870","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
Operation of QDMA-based ad hoc networks 基于qdma的自组织网络的运行
2010 Wireless Telecommunications Symposium (WTS) Pub Date : 2010-04-21 DOI: 10.1109/WTS.2010.5479655
Vijay P. Ramalingam, J. Daigle
{"title":"Operation of QDMA-based ad hoc networks","authors":"Vijay P. Ramalingam, J. Daigle","doi":"10.1109/WTS.2010.5479655","DOIUrl":"https://doi.org/10.1109/WTS.2010.5479655","url":null,"abstract":"The objective of this paper is to present a detailed description of the operation of an ad hoc network based on the Quadrature Division Multiple Access (QDMA) patent. The QDMA patent alludes to a communication paradigm for building code division multiple access (CDMA) based networks in the absence of base stations. The nodes in the QDMA network organize themselves as a hierarchical collection of squads, each having a node that manages the communication process among the squad members. To the best of our knowledge, there is no definitive explanation of any QDMA-based protocols in the literature. Herein, we describe, in detail, our understanding of the architecture of the QDMA-based network, as well as protocols for establishing and maintaining QDMA networks and for communicating among the mobile nodes. Our immediate objective is to present protocol definitions sufficient for doing meaningful performance analysis and for understanding the properties of QDMA-based ad hoc networks.","PeriodicalId":117027,"journal":{"name":"2010 Wireless Telecommunications Symposium (WTS)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133929983","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
Transparent session transfer in converged IP Messaging systems 融合IP消息传递系统中的透明会话传输
2010 Wireless Telecommunications Symposium (WTS) Pub Date : 2010-04-21 DOI: 10.1109/WTS.2010.5479636
Y. Kwon, Jae-Deuk Jang, Hyunwoo Lee, Haewook Lee, Bummo Koo, Wuk Kim, Hyeonsang Eom
{"title":"Transparent session transfer in converged IP Messaging systems","authors":"Y. Kwon, Jae-Deuk Jang, Hyunwoo Lee, Haewook Lee, Bummo Koo, Wuk Kim, Hyeonsang Eom","doi":"10.1109/WTS.2010.5479636","DOIUrl":"https://doi.org/10.1109/WTS.2010.5479636","url":null,"abstract":"It has recently become possible to connect heterogeneous networks as the 4th generation networks have evolved. Services converged and unified with similar services in each network are more widely provided than ever. OMA (Open Mobile Alliance), an international standardization organization concerning mobile technologies, is now standardizing various functions regarding CPM (Converged IP Messaging) for the messaging service of the 4th generation networks. These functions include a method for dealing with various devices used by a single user. When communicating with a conversation partner, a user with multiple devices may transfer the communication session from one device to another. In this session transfer, the records of previous communication need to be maintained and transmitted in order to ensure the consistency of user experience. In this paper, we introduce two (source device and target device-initiated) methods for session transfer in CPM, that ensure the consistency of user experience; via the guaranteed delivery of session history stored before the transfer and the messages temporarily stored during the transfer, these methods permit transparent transfer causing minimal interruption in the conversation. With our prototype for session transfer in CPM, we demonstrate that the methods are effective in session transfer without loss of any data or unnecessary delay in conversation.","PeriodicalId":117027,"journal":{"name":"2010 Wireless Telecommunications Symposium (WTS)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126358120","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
Wireless telecommunications in Latin America: A comparison of the market portfolios of America Movil and Telefonica 拉丁美洲的无线通讯:美洲移动和西班牙电信的市场组合比较
2010 Wireless Telecommunications Symposium (WTS) Pub Date : 2010-04-21 DOI: 10.1109/WTS.2010.5479642
Steven R. Powell
{"title":"Wireless telecommunications in Latin America: A comparison of the market portfolios of America Movil and Telefonica","authors":"Steven R. Powell","doi":"10.1109/WTS.2010.5479642","DOIUrl":"https://doi.org/10.1109/WTS.2010.5479642","url":null,"abstract":"With the growth of their Latin American mobile telecommunications markets slowing, regulatory pressures intensifying, and new entrants worsening an already unfavorable competitive environment, and in order to capitalize on the opportunity to increase revenues by providing new wireless data and video services to subscribers, Telefonica and America Movil management have begun to restructure their companies and re-think their internationalization strategies. This paper focuses on the two companies' Latin American market portfolios in 2008, comparing the portfolios with respect to the attractiveness of their markets and the companies' competitive positions in them, and how they changed from 2002 to 2008. The degrees of market attractiveness and competitive strength the portfolios possessed, as well as their variability across the markets in the portfolios, are considered. The portfolio analysis technique employed in the paper may have wider applicability for formulating corporate strategy.","PeriodicalId":117027,"journal":{"name":"2010 Wireless Telecommunications Symposium (WTS)","volume":"604 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131507500","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
Regularized channel inversion dirty-paper coding (RCI-DPC): Narrowing the power offset in MIMO X channels 正则化信道反转脏纸编码(RCI-DPC):缩小MIMO X信道的功率偏移
2010 Wireless Telecommunications Symposium (WTS) Pub Date : 2010-04-21 DOI: 10.1109/WTS.2010.5479675
A. Anderson
{"title":"Regularized channel inversion dirty-paper coding (RCI-DPC): Narrowing the power offset in MIMO X channels","authors":"A. Anderson","doi":"10.1109/WTS.2010.5479675","DOIUrl":"https://doi.org/10.1109/WTS.2010.5479675","url":null,"abstract":"The multiple-input multiple-output (MIMO) X channel consists of two transmitting nodes each sending independent data to two receiving nodes - all nodes equipped with multiple antennas. The MIMO X channel is a more general case of the well-studied broadcast (BC), multiple-access (MAC), and interference (IC) channels. A signaling technique called interference alignment (IA) has been shown to achieve certain multiplexing gains available to the X channel; however, interference alignment maintains a power offset from optimal cooperative signaling in the equivalent single-user channel. Cooperation or sharing of data between transmit and/or receive nodes provides significant increase in the achievable multiplexing and power offset gains. In this current work an adaptation of a common beamforming technique is used to decrease the power offset seen with interference alignment while maintaining the multiplexing gains of X channels guaranteed with interference alignment. Akin to zero-forcing dirty-paper coding (ZF-DPC) and interference alignment, the proposed technique uses regularized channel inversion with dirty-paper coding (RCI-DPC) to maximize the sum-rate of theMIMO X channel and hence attempts to minimize the associated power offset in the same channels.","PeriodicalId":117027,"journal":{"name":"2010 Wireless Telecommunications Symposium (WTS)","volume":"137 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123276329","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: 1
Minimum energy consumption design of A two-hop relay network for QoS guarantee 一种保证QoS的两跳中继网络的最小能耗设计
2010 Wireless Telecommunications Symposium (WTS) Pub Date : 2010-04-21 DOI: 10.1109/WTS.2010.5479670
C. Lee, G. Hwang
{"title":"Minimum energy consumption design of A two-hop relay network for QoS guarantee","authors":"C. Lee, G. Hwang","doi":"10.1109/WTS.2010.5479670","DOIUrl":"https://doi.org/10.1109/WTS.2010.5479670","url":null,"abstract":"In this paper we consider a two-hop relay network consisting of a source, a destination and multiple relay nodes. For a given quality of service (QoS) requirement such as transmission rate between the source and the destination, relay nodes have an adaptive power control scheme to meet the QoS requirement. The adaptive power control scheme is assumed to be based on the channel condition between relay nodes and the destination. It is then an interesting problem to design an optimal relay network that minimizes total average energy consumption. By considering the details on the operations of the relay selection protocol considered in this paper, we first develop a mathematical model for the relay network and analyze total average energy consumption. Based on our analytic results, we formulate an optimization problem with which we can design an optimal relay network that minimizes total average energy consumption. We provide some numerical examples to investigate the behavior of total average energy consumption of the relay network.","PeriodicalId":117027,"journal":{"name":"2010 Wireless Telecommunications Symposium (WTS)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124909729","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: 11
Dynamic channel allocation schemes for overlay cellular architectures 覆盖蜂窝结构的动态信道分配方案
2010 Wireless Telecommunications Symposium (WTS) Pub Date : 2010-04-21 DOI: 10.1109/WTS.2010.5479662
H. Aki, M. C. Ertürk, H. Arslan
{"title":"Dynamic channel allocation schemes for overlay cellular architectures","authors":"H. Aki, M. C. Ertürk, H. Arslan","doi":"10.1109/WTS.2010.5479662","DOIUrl":"https://doi.org/10.1109/WTS.2010.5479662","url":null,"abstract":"Conventional cellular systems have not taken full advantage of frequency reuse and adaptive allocation due to the fixed cluster size and uniformed channel assignment procedure. In this paper, we propose two reuse portioning scheme for adaptive channel allocation namely maximal dynamic reuse partitioning (MDRP) and optimal dynamic reuse partitioning (ODRP). We propose that an overlaying cellular clustering scheme which uses adaptive cluster size would provide a better capacity by exploiting the high level of signal to interference ratio (SIR). The proposed methods are studied via simulations and the results show that the adaptive clustering with optimization provide a better capacity and grade of service (GoS) under some assumptions comparing to the conventional cellular architectures.","PeriodicalId":117027,"journal":{"name":"2010 Wireless Telecommunications Symposium (WTS)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114555347","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
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