International Symposium on Wireless and pervasive Computing (ISWPC)最新文献_第3页

Design and implementation of the baseband transceiver for the HD radio AM system 高清无线电调幅系统基带收发器的设计与实现

International Symposium on Wireless and pervasive Computing (ISWPC) Pub Date : 2013-11-01 DOI: 10.1109/ISWPC.2013.6707443

Chien-Sheng Chen, N. Chilamkurti, Chen-Ming Tseng

{"title":"Design and implementation of the baseband transceiver for the HD radio AM system","authors":"Chien-Sheng Chen, N. Chilamkurti, Chen-Ming Tseng","doi":"10.1109/ISWPC.2013.6707443","DOIUrl":"https://doi.org/10.1109/ISWPC.2013.6707443","url":null,"abstract":"In recent years, the spectrum resource has become a more and more important consideration for the designs of wireless communication system. Therefore, Hybrid In-Band On-Channel (HIBOC) broadcasting system has been proposed as a composite solution to transmit digital and analog amplitude modulation (AM) signals in the conventional AM band. This system has been adopted by US as a digital radio broadcasting standard, and the specification is named as HD Radio AM. Although the modulation scheme in this standard is the Orthogonal Frequency Division Multiplexing (OFDM) which has been widely applied to various digital communication systems, the receiver architecture could not be the same as the conventional OFDM receiver design owing to the overlapping spectrum between the analog and digital signals. In this paper, a high-pass filter is employed to improve the performance of the symbol timing detection. In a fading channel, the channel response must be estimated before canceling the interference of the analog AM signals. Besides, when implementing the system on the FPGA based hardware platform, both the theoretical and the practical aspects have been considered to reach the available hardware resource. Simulation results show that the proposed scheme can keep good system performance.","PeriodicalId":301015,"journal":{"name":"International Symposium on Wireless and pervasive Computing (ISWPC)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130009427","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

QoS-constrained resource allocation scheduling for LTE network 基于qos约束的LTE网络资源分配调度

International Symposium on Wireless and pervasive Computing (ISWPC) Pub Date : 2013-11-01 DOI: 10.4018/ijwnbt.2015010101

Hung-Chin Jang, Yun-Jun Lee

{"title":"QoS-constrained resource allocation scheduling for LTE network","authors":"Hung-Chin Jang, Yun-Jun Lee","doi":"10.4018/ijwnbt.2015010101","DOIUrl":"https://doi.org/10.4018/ijwnbt.2015010101","url":null,"abstract":"Long Term Evolution (LTE) is the most promising technology for 4G mobile communication networks. The goal of LTE is to provide high data transmission rate, scalable bandwidth, low latency, and high-mobility. LTE employs Orthogonal Frequency Division Multiplexing (OFDM) and Single Carrier - Frequency Division Multiple Access (SC-FDMA) for downlink and uplink data transmission, respectively. As to SC-FDMA, there are two constraints in resource allocation. First, the allocated resource blocks (RB) should be contiguous. Second, these allocated resource blocks are forced to use the same modulation technique. This paper focuses on the resource allocation problem of LTE SC-FDMA system. The aim of this paper is to propose a QoS-constraint resource allocation scheduling to enhance data transmission on uplink SC-FDMA. The proposed scheduling is a three-stage approach. In the first stage, it uses a time domain scheduler to differentiate UE services according to different QoS service requirements. In the second stage, it uses a frequency domain scheduler to prioritize UE services based on channel quality. In the third stage, it limits the times of modulation downgrade in RBs allocation to enhance system throughput. In the simulations, the proposed method is compared to fixed sub-carrier dynamic resource allocation algorithm and adaptive dynamic sub-carrier resource allocation algorithm. Simulation results show that our method outperforms the other two methods in terms of throughput, transmission delay, packet loss ratio, and RB utilization.","PeriodicalId":301015,"journal":{"name":"International Symposium on Wireless and pervasive Computing (ISWPC)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124001315","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: 45

Efficient self-adjustment places of interest finding by eliminating dynamic access point beacons in public places 通过消除公共场所的动态接入点信标，有效地自我调整兴趣地点

International Symposium on Wireless and pervasive Computing (ISWPC) Pub Date : 2013-11-01 DOI: 10.1109/ISWPC.2013.6707445

Chow-Sing Lin, Shang-Hsuan Hsu

{"title":"Efficient self-adjustment places of interest finding by eliminating dynamic access point beacons in public places","authors":"Chow-Sing Lin, Shang-Hsuan Hsu","doi":"10.1109/ISWPC.2013.6707445","DOIUrl":"https://doi.org/10.1109/ISWPC.2013.6707445","url":null,"abstract":"Existing fingerprint-based places of interest (POIs) finding approaches mainly rely on WiFi signal fingerprints of fixed access points. Due to the prevailing of smartphones and 3G networks, more and more mobile hotspots acting as dynamic access points in public places have hindered the effectiveness of the learning and recognition of POIs. How to effectively eliminate those casually appeared mobile hotspots to improve the accuracy of place finding has recently drawn a lot of research attentions. In this paper, we propose the self-adjustment places of interest finding (SAPFI) to deal with the aforementioned problem. By weighted merging of WiFi beacons in the fingerprints of two similar places, the SAPFI is more robust than the existing place finding approaches such as BeaconPrint, PlaceSence, and SensLoc, especially in detecting public places where mobile hotspots are highly likely presented. The experiment results showed that compared to the existing place finding approaches, the SAPFI has the highest precision of 0.94 and the highest recall of 0.8 in POI discovering. In addition, the SAPFI with the highest F1 score of 0.86 also shows its superiority in place learning and recognition.","PeriodicalId":301015,"journal":{"name":"International Symposium on Wireless and pervasive Computing (ISWPC)","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121217475","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

Adaptive Recursive Spatial Multiplexing (RSM) in interference-limited scenarios 干扰限制下的自适应递归空间复用(RSM)

International Symposium on Wireless and pervasive Computing (ISWPC) Pub Date : 2013-11-01 DOI: 10.1109/ISWPC.2013.6707428

Usama Y. Mohamad, I. A. Shah, T. Hunziker, D. Dahlhaus

{"title":"Adaptive Recursive Spatial Multiplexing (RSM) in interference-limited scenarios","authors":"Usama Y. Mohamad, I. A. Shah, T. Hunziker, D. Dahlhaus","doi":"10.1109/ISWPC.2013.6707428","DOIUrl":"https://doi.org/10.1109/ISWPC.2013.6707428","url":null,"abstract":"Recursive Spatial Multiplexing (RSM) is a closed loop multiple-input multiple-output (MIMO) structure for achieving the capacity offered by MIMO channels with a low-complexity detector. We investigate how to make RSM able to deal with different interference scenarios. The interference at the receiver side is considered as a vector-valued stochastic process characterized by a covariance matrix which is to be estimated and used subsequently for defining the retransmission subspace identifier to be fed back to the transmitter. We consider both the sample covariance matrix (SCM) estimator and an empirical Bayesian (EB) scheme as well as different probability distribution functions and correlation properties of the interference vectors. It turns out that the proposed RSM modification substantially improves the bit-error rate performance in the presence of interference where EB and SCM perform comparably due to the conditions for the covariance matrix estimation in RSM with limited frame length. Moreover, adaptive RSM leads to a performance being independent of the correlation coefficient of the interference vector.","PeriodicalId":301015,"journal":{"name":"International Symposium on Wireless and pervasive Computing (ISWPC)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122270360","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

A formal executable specification of the GinMAC protocol for Wireless Sensor Actuator Networks 用于无线传感器执行器网络的GinMAC协议的正式可执行规范

International Symposium on Wireless and pervasive Computing (ISWPC) Pub Date : 2013-11-01 DOI: 10.1109/ISWPC.2013.6707433

A. Somappa, L. Kristensen, Knut Øvsthus

{"title":"A formal executable specification of the GinMAC protocol for Wireless Sensor Actuator Networks","authors":"A. Somappa, L. Kristensen, Knut Øvsthus","doi":"10.1109/ISWPC.2013.6707433","DOIUrl":"https://doi.org/10.1109/ISWPC.2013.6707433","url":null,"abstract":"The inception of Wireless Sensor Actuator Networks from the existing Wireless Sensor Networks domain was motivated by the need to satisfy the requirements of automation applications. Automation applications cover a broad domain from industrial automation, home automation to automation in body area networks and have specific real-time requirements differing from each other depending on the criticality of the application. Given the complex nature of WSAN, efficient techniques are required to obtain error-free protocol designs. Formal specification languages like Coloured Petri Nets assist designers to capture this complexity. GinMAC is a Medium Access Control (MAC) protocol that aims at satisfying the real-time requirements laid down by the Wireless Sensor Actuator Networks applications. In this article, we provide a formal executable specification for the GinMAC protocol. With this formal executable model, we precisely capture the abstract features of this protocol and analyze it. Our formal executable model is platform independent and can be used as a basis for further analysis of the protocol or any protocol extensions that are made to this protocol. The platform independence allows us to convert this model to various other analysis tools including model checkers, network simulators, and hardware emulators.","PeriodicalId":301015,"journal":{"name":"International Symposium on Wireless and pervasive Computing (ISWPC)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124133761","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

UE performance evaluation on LTE indoor and outdoor testbeds LTE室内和室外试验台的UE性能评估

International Symposium on Wireless and pervasive Computing (ISWPC) Pub Date : 1900-01-01 DOI: 10.1109/ISWPC.2013.6707431

J. Hung, Chia-Yu Ku, H. Cheng, Li-Ping Tung, B. Lin

引用次数: 2