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The LISA prototype framework for media access and delivery 用于媒体访问和交付的LISA原型框架
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291284
Craig M. Gelowitz, L. Benedicenti, R. Paranjape
{"title":"The LISA prototype framework for media access and delivery","authors":"Craig M. Gelowitz, L. Benedicenti, R. Paranjape","doi":"10.1109/PACRIM.2009.5291284","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291284","url":null,"abstract":"This paper presents the LISA (Location Independent Service Agents) prototype framework for location independent media service access and delivery. Location independent media services imply that a user can be nomadic and be delivered media services at any location via the network. The delivery of media using mobile agent technology enhances the access and delivery of media services by evaluating the media and network context. To enable these enhancements, mobile agents must traverse networks to discover and deliver media services to nomadic users. The LISA prototype uses mobile agents that cooperate to traverse networks, find media, determine media context, and provide media services. This paper addresses two sources of contextual information within this paradigm, the contextual nature of the network path and the current context of multiple sources of media storage.","PeriodicalId":217751,"journal":{"name":"2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126744722","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
Cellular WiMAX/IEEE 802.16 capacity estimation 蜂窝WiMAX/IEEE 802.16容量估计
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291326
S. Murawwat, K. Ahmed
{"title":"Cellular WiMAX/IEEE 802.16 capacity estimation","authors":"S. Murawwat, K. Ahmed","doi":"10.1109/PACRIM.2009.5291326","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291326","url":null,"abstract":"WiMAX has been an appealing technology due to its provision of high data rate applications to users. In this paper, we have estimated and analyzed the capacity of IEEE 802.16/WiMAX network, taking into consideration as a cellular mobile technology. Capacity here is in terms of number of users in a cellular environment of definite size. The performance measures used for this analysis are coverage and capacity. A reference scenario is considered. Different parameters for this scenario are assumed and adopted from literature.","PeriodicalId":217751,"journal":{"name":"2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126453990","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
Network low density parity check codes designed for multiple-access relay channel 多址中继信道网络低密度奇偶校验码设计
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291317
Guanghui Song, Ying Li, Jun Cheng, Y. Watanabe
{"title":"Network low density parity check codes designed for multiple-access relay channel","authors":"Guanghui Song, Ying Li, Jun Cheng, Y. Watanabe","doi":"10.1109/PACRIM.2009.5291317","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291317","url":null,"abstract":"A relay scheme combining network coding with channel coding is proposed for multiple-access relay channel. Via a newly designed network low density parity check code, this scheme permits the relay node to jointly encode the data information from two source nodes. To predict the system performance, a newly generalized Gaussian approximation algorithm is derived, based on which an optimization algorithm is developed to search the degree distribution of the network LDPC code. Simulations show that, in a network with two sources, one relay and one destination, the system with the designed network low density parity check code hold a performance gap less than 0.6dB from the threshold and a performance gain of about 0.3dB can be achieved to the same rate XOR network coding scheme at BER=10−5.","PeriodicalId":217751,"journal":{"name":"2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122294615","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
Coarse-grain reconfigurable architectures - taxonomy - 粗粒度可重构体系结构。分类法
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291237
M. Sima, M. McGuire, J. Lamoureux
{"title":"Coarse-grain reconfigurable architectures - taxonomy -","authors":"M. Sima, M. McGuire, J. Lamoureux","doi":"10.1109/PACRIM.2009.5291237","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291237","url":null,"abstract":"Digital signal processing for wireless communications is computationally intensive, and hardware support is needed. Coarse-grain reconfigurable arrays provide hardware-like performance with software-like flexibility. There are two major classes of coarse-grain reconfigurable arrays: Multiply-and-ACcumulate and Shift-and-Add. This paper gives an overview of the major devices in these classes under the form of a taxonomy.","PeriodicalId":217751,"journal":{"name":"2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121825829","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
Performance of angle-and-range-based localization of wireless sensors 基于角度和距离的无线传感器定位性能
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291242
P. Mazurkiewicz, K. Leung
{"title":"Performance of angle-and-range-based localization of wireless sensors","authors":"P. Mazurkiewicz, K. Leung","doi":"10.1109/PACRIM.2009.5291242","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291242","url":null,"abstract":"In wireless sensor networks, the accuracy of localization information deteriorates significantly after relaying multiple hops due to accumulation of errors. Techniques exist to enhance the localization information by employing redundant measurements available in networks with high connectivity or from a large number of reference nodes. However, it is challenging to obtain accurate localization information in deployment environments with: 1) unfavorable radio-propagation characteristics that degrade measurements, or 2) sparse topologies that limit the redundancy. One such example is underground tunnels. In this paper, we study the performance of localization techniques that are applicable to such sparse networks. Particularly we focus on the COBALT method, which is based on cliques of nodes in the network and uses angle of arrival and range estimates. For different techniques, we show the influence of the connectivity among sensor nodes on the accuracy. Our results show that the COBALT method outperforms other general-purpose localization techniques.","PeriodicalId":217751,"journal":{"name":"2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133938180","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: 3
Pairwise optimization of modulation constellations 调制星座的两两优化
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291377
Brendan Moore, G. Takahara, F. Alajaji
{"title":"Pairwise optimization of modulation constellations","authors":"Brendan Moore, G. Takahara, F. Alajaji","doi":"10.1109/PACRIM.2009.5291377","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291377","url":null,"abstract":"The design of two-dimensional signal constellations for the transmission of binary non-uniform memoryless sources over additive white Gaussian noise channels is investigated. The main application of this problem is the implementation of improved constellations where transmitted data is highly non-uniform. A simple algorithm, which optimizes a constellation by re-arranging its points in a pairwise fashion (i.e., two points are modified a time with the other points remaining fixed), is presented. In general, the optimized constellations depend on both the source statistics and the signalto- noise ratio (SNR) in the channel. We show that constellations designed with source statistics considered can yield symbol error rate performance that is substantially better than rectangular quadrature amplitude modulation signal sets used with either Gray mapping or more recently developed maps. Gains as high as 5 dB in Eb/N0 SNR are obtained for highly non-uniform sources.","PeriodicalId":217751,"journal":{"name":"2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124848467","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
Architecting graphics processors for non-graphics compute acceleration 为非图形计算加速设计图形处理器
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291239
Tor M. Aamodt
{"title":"Architecting graphics processors for non-graphics compute acceleration","authors":"Tor M. Aamodt","doi":"10.1109/PACRIM.2009.5291239","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291239","url":null,"abstract":"This paper discusses the emergence of graphics processing units (GPUs) that contain architecture features for accelerating non-graphics (or GPGPU) applications. It provides an introduction for those interested in undertaking research at the intersection of manycore computing and GPU architecture. First, the motivation for using GPUs for non-graphics processing rather than developing specialized hardware is outlined. Then, the features of GPU architectures and related programming models for non-graphics computing on GPUs are briefly described. Finally, some recent research and architecture challenges related to accelerating non-graphics workloads on GPUs are summarized.","PeriodicalId":217751,"journal":{"name":"2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117176674","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: 9
A natural acoustic front-end for Interactive TV in the EU-Project DICIT 欧盟项目DICIT中交互式电视的自然声学前端
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291251
L. Marquardt, P. Svaizer, E. Mabande, A. Brutti, C. Zieger, M. Omologo, Walter Kellermann
{"title":"A natural acoustic front-end for Interactive TV in the EU-Project DICIT","authors":"L. Marquardt, P. Svaizer, E. Mabande, A. Brutti, C. Zieger, M. Omologo, Walter Kellermann","doi":"10.1109/PACRIM.2009.5291251","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291251","url":null,"abstract":"“Distant-talking Interfaces for Control of Interactive TV” (DICIT) is a European Union-funded project whose main objective is to integrate distant-talking voice interaction as a complementary modality to the use of a remote control in interactive TV systems. Hands-free and seamless control enables a natural user-system interaction providing a suitable means to greatly ease information retrieval. In the given living room scenario the system recognizes commands spoken by multiple and possibly moving users, even in the presence of background noise and TV surround audio. This paper focuses on the multichannel acoustic frontend (MCAF) processing for acoustic scene interpretation which is based on the combination of multi-channel acoustic echo cancellation, blind source separation, beamforming, acoustic event classification, and multiple speaker localization. The fully functional DICIT prototype consists of the MCAF, automatic speech recognition, natural language understanding, mixed-initiative dialogue and satellite connection.","PeriodicalId":217751,"journal":{"name":"2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114118007","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
Power allocation for coded cooperative communications 编码协作通信的功率分配
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291328
Naruhiko Fujiwara, M. Yasutake, Chen Sun, Jun Cheng, Y. Watanabe
{"title":"Power allocation for coded cooperative communications","authors":"Naruhiko Fujiwara, M. Yasutake, Chen Sun, Jun Cheng, Y. Watanabe","doi":"10.1109/PACRIM.2009.5291328","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291328","url":null,"abstract":"A power allocation in a coded cooperation is investigated. For given a total transmit power, an optimal transmit power ratio is obtained in a sense that the average received signal-to-noise ratio (SNR) from the source node and that from the relay node are equal at the sink node. Simulation for a rate compatible punctured convolutional (RCPC) code-based cooperation shows that the power allocation with the optimal transmit power ratio gives the lowest bit error rate.","PeriodicalId":217751,"journal":{"name":"2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"283 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115337917","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
On the performance of CP based exponentially weighted block RLS channel estimation algorithm for OFDM systems 基于CP的指数加权块RLS信道估计算法在OFDM系统中的性能研究
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291385
Ali Hassan, Ling E Pooh
{"title":"On the performance of CP based exponentially weighted block RLS channel estimation algorithm for OFDM systems","authors":"Ali Hassan, Ling E Pooh","doi":"10.1109/PACRIM.2009.5291385","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291385","url":null,"abstract":"Cyclic Prefix (CP) based block Recursive Least Squares (RLS) channel estimation algorithms have been proposed for Orthogonal Frequency Division Multiplexing (OFDM) systems. In this paper, we investigate the performance of CP based exponentially weighted block RLS channel estimator. Our analysis and extensive simulation results show that smaller values of exponential forgetting weightings cause increase in convergence time and steady state performance error of the algorithm. Furthermore, performance of the approach degrades with the increase in channel nulls and constellation size.","PeriodicalId":217751,"journal":{"name":"2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116104900","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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