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2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing最新文献

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Efficient implementation of OVSF code generator for UMTS systems 用于UMTS系统的OVSF代码生成器的有效实现
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291322
Seunghwan Kim, Minji Kim, Chantaek Shin, Jinyong Lee, Younglok Kim
{"title":"Efficient implementation of OVSF code generator for UMTS systems","authors":"Seunghwan Kim, Minji Kim, Chantaek Shin, Jinyong Lee, Younglok Kim","doi":"10.1109/PACRIM.2009.5291322","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291322","url":null,"abstract":"In this paper, we propose a multi-stage OVSF code generator using single code index. The performances of the conventional methods such as logic gates, counter or LUT are evaluated in terms of complexity, speed and power dissipation according to various spreading factors used in UMTS systems. The results are applied to our multi-stage design in order to implement the most efficient code generator. The proposed structure that is synthesized in Samsung 0.35 µm CMOS library decreases the power consumption up to 26.5%. It needs 203 more gates compared to the counter based generator which is the most efficient among the conventional methods, which can be ignored in terms of the whole chip area.","PeriodicalId":217751,"journal":{"name":"2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"44 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":"116082656","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: 8
Frame rate up-conversion of compressed video using region segmentation and depth ordering 使用区域分割和深度排序的压缩视频帧率上转换
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291333
Yue Chen, I. Bajić, C. Qian
{"title":"Frame rate up-conversion of compressed video using region segmentation and depth ordering","authors":"Yue Chen, I. Bajić, C. Qian","doi":"10.1109/PACRIM.2009.5291333","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291333","url":null,"abstract":"In this paper, a region-based method is proposed for frame rate up-conversion. To reduce spatial discontinuities and mitigate deformed structures commonly seen in block-based motion-compensated frame interpolation approaches, the proposed method interpolates frames based on depth-ordered moving regions. We develop a 3-parameter motion model to describe regions' moving trajectories, and use the local depth order among neighboring regions for occlusion during frame synthesis. Experimental results show that the proposed scheme is very effective in removing block artifacts in interpolated frames, and has a better visual quality compared to conventional methods.","PeriodicalId":217751,"journal":{"name":"2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"24 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":"123435810","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
Sensor fusion method for passive acoustic arrays 无源声阵列传感器融合方法
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291277
M. Hegedus, R. Paranjape, M. Mehrandezh
{"title":"Sensor fusion method for passive acoustic arrays","authors":"M. Hegedus, R. Paranjape, M. Mehrandezh","doi":"10.1109/PACRIM.2009.5291277","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291277","url":null,"abstract":"For passive acoustic arrays, a general method is described that ranks and selects multiple microphone configurations within the array that are likely to produce accurate position estimates. This method segments a two-dimensional array into various configurations of microphone pairs and flattens these configurations into one-dimension for comparison. Each configuration is ranked based on the microphones' spatial information (known a-priori) and incoming bearing estimates. These rankings select different microphone pair configurations, whose position estimates are combined in a weighted-average algorithm. Simulations and experimental results show that this method selects microphone configurations that provide the least position error. Through a fusion algorithm, which combines individual microphone pair data, an array's position accuracy can improve.","PeriodicalId":217751,"journal":{"name":"2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"4 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":"128595022","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
Performance of enhanced proportional fair scheduling in HSDPA for multimedia service streaming HSDPA多媒体业务流中增强比例公平调度的性能研究
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291352
Wei Li, T. Gulliver
{"title":"Performance of enhanced proportional fair scheduling in HSDPA for multimedia service streaming","authors":"Wei Li, T. Gulliver","doi":"10.1109/PACRIM.2009.5291352","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291352","url":null,"abstract":"Scheduling algorithms are very important for the performance and capacity of cellular systems. In this paper, we present an enhanced proportional fair scheduling algorithm for HSDPA. Scheduling performance is evaluated with different network scenarios for streaming of multimedia services. The streaming service model is based on 3GPP protocols.","PeriodicalId":217751,"journal":{"name":"2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"219 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":"127607635","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
Low complexity user loading emulation for 3G wireless systems testbeds 3G无线系统试验台低复杂度用户加载仿真
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291296
Siddharth Mohan, V. Chande, P. K. Vitthaladevuni, R. Kapoor
{"title":"Low complexity user loading emulation for 3G wireless systems testbeds","authors":"Siddharth Mohan, V. Chande, P. K. Vitthaladevuni, R. Kapoor","doi":"10.1109/PACRIM.2009.5291296","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291296","url":null,"abstract":"In a real-time test or demonstration environment/setup with support for only a few users, capturing the effects of large number of users in the system on a single user in terms of delay experienced and allocation of the shared resources is a challenge. In such a scenario, we propose a technique to emulate (or capture) the presence of large number of users with multiple QoS, resource constraints and channel conditions which we collectively refer to as load, without the load having to be present. We also implement the proposed loading emulation technique in Qualcomm's prototype VoIP over HSPA system and compare the results of applying such a technique with results from Qualcomm's network simulations supporting multiple users. We show that this emulation can be used to effectively capture load in a 3G HSPA+ test equipment.","PeriodicalId":217751,"journal":{"name":"2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"37 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":"126713704","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
Regulating voice traffic rate in mobile wireless ad hoc networks 移动无线自组织网络话音流量的调节
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291275
Hongqiang Zhang, O. Yang, Jiying Zhao
{"title":"Regulating voice traffic rate in mobile wireless ad hoc networks","authors":"Hongqiang Zhang, O. Yang, Jiying Zhao","doi":"10.1109/PACRIM.2009.5291275","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291275","url":null,"abstract":"This paper reports on further in-depth simulation study of the ASNC (Adaptive Source Networkrate Control) scheme to battle packet loss in mobile wireless adhoc network. Our evaluations of throughput, packet loss rate and MOS have validated the feasibility and efficiency of our scheme. Comparisons with static networks are also provided.","PeriodicalId":217751,"journal":{"name":"2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"14 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":"121063928","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
An optimization method for edge-detector parameter tuning based on visual perception 一种基于视觉感知的边缘检测器参数优化方法
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291293
Flávio C. A. Teixeira, Stuart W. A. Bergen, A. Antoniou
{"title":"An optimization method for edge-detector parameter tuning based on visual perception","authors":"Flávio C. A. Teixeira, Stuart W. A. Bergen, A. Antoniou","doi":"10.1109/PACRIM.2009.5291293","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291293","url":null,"abstract":"An optimization method for tuning the parameters of edge detection algorithms based on visual perception is proposed and applied to the Sobel, Laplacian of Gaussian (LoG), and Canny detectors. The method uses human visual quality perception to compare edge maps generated by different edge detector parameter values and iteratively reduces the parameter search space by means of a coordinate search. The method is applicable to any parameterized edge detector. Examples demonstrate that use of the Canny detector yields the most visually appealing edge maps. However, it requires 2.5 and 1.8 times the number of iterations required by the Sobel and LoG detectors, respectively.","PeriodicalId":217751,"journal":{"name":"2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"8 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":"121261445","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
Blind signal separation via independent component analysis 通过独立分量分析实现盲信号分离
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291346
F. Kragh, J. Garvey, C. Robertson
{"title":"Blind signal separation via independent component analysis","authors":"F. Kragh, J. Garvey, C. Robertson","doi":"10.1109/PACRIM.2009.5291346","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291346","url":null,"abstract":"The “Infomax” method of Independent Component Analysis (ICA) is applied to the problem of separating received signals that overlap in time and frequency, but are otherwise unrelated. The Infomax method separates unknown non-Gaussian signals from a number of signal mixtures by maximizing the entropy of a transformed set of signal mixtures. This work specifically focuses on mixtures of simple communications signals. The Infomax method, as implemented, is found to be successful and efficient for small numbers of signals.","PeriodicalId":217751,"journal":{"name":"2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"12 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":"129390767","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
A precoding technique for joint relaying and broadcasting in cognitive radio networks 认知无线网络中联合中继和广播的预编码技术
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291340
A. Ghaznavi, S. M. Razavizadeh
{"title":"A precoding technique for joint relaying and broadcasting in cognitive radio networks","authors":"A. Ghaznavi, S. M. Razavizadeh","doi":"10.1109/PACRIM.2009.5291340","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291340","url":null,"abstract":"In this paper, we consider a cognitive radio network in which the primary system base station acts as relay for the cognitive or secondary system as well as transmitting the primary users' data streams on the downlink channel. We propose a precoding technique which is used at the base station of the primary system. Using this technique, it is possible to keep the signal to interference plus noise ratio (SINR) of the primary users above a required value and in addition to help the cognitive system by relaying signals from secondary base station to desired cognitive users. Although the proposed method needs the primary base station to be modified and to perform additional processing, it does not need any modification in the primary users and moreover, the interference induced on the primary users are controlled. In this paper, we assume that the primary base station is equipped with multiple transmit antennas. The proposed precoding scheme is based on the Block Diagonalization technique which removes the inter-user interference and it is combined with maximal signal to jamming plus noise ratio (SJNR) precoding method which minimizes the inter-user interference.","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":"129402202","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
Generating sentences by reverse-parsing 通过反向解析生成句子
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291414
Takashi Yanagisawa, T. Miura
{"title":"Generating sentences by reverse-parsing","authors":"Takashi Yanagisawa, T. Miura","doi":"10.1109/PACRIM.2009.5291414","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291414","url":null,"abstract":"In this investigation we discuss how to generate sentences which carry given semantics. Usually we describe syntax (sentences) in terms of structure over semantics, but we don't discuss which sentences are suitable to describe our intents. Here we discuss how to generate sentences enough to satisfy constraints over them by examining arithmetic expressions.","PeriodicalId":217751,"journal":{"name":"2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"13 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":"116933862","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
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