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2008 4th IEEE International Conference on Circuits and Systems for Communications最新文献

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A Low-Complexity Reed-Solomon Decoder 低复杂度Reed-Solomon解码器
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.67
Nan Jiang, Kewu Peng, Zhixing Yang
{"title":"A Low-Complexity Reed-Solomon Decoder","authors":"Nan Jiang, Kewu Peng, Zhixing Yang","doi":"10.1109/ICCSC.2008.67","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.67","url":null,"abstract":"A new low-complexity Reed-Solomon decoder is presented in this paper. The proposed RS decoder features a novel time-sharing scheme of decoding elements, and thus a low complexity for hardware implementation. After existing RS decoding algorithms are investigated, the algorithms with lower complexities are introduced in the decoder. The regular architecture for inversion-free Berlekamp-Massey algorithm of finding the error-locator polynomial is employed and further exploited for computing syndromes and determining the error pattern, two other phases of RS decoding. As shown in synthesis results, the FPGA resource is reduced by about 75% in contrast to that of the conventional decoder. Attaining significant reduction of hardware complexity, the proposed decoding architecture is competent for efficiency-demanding systems, in particular for wireless and mobile communication systems.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"1995 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125557380","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
Routing Metrics in Cognitive Radio Networks 认知无线网络中的路由度量
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.62
Guang Lei, Wei Wang, Tao Peng, Wenbo Wang
{"title":"Routing Metrics in Cognitive Radio Networks","authors":"Guang Lei, Wei Wang, Tao Peng, Wenbo Wang","doi":"10.1109/ICCSC.2008.62","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.62","url":null,"abstract":"Routing in cognitive radio networks (CRN) should consider both the end-to-end performances and the interference to the primary systems. In this paper, we categorized routing metrics into three types and derived new metrics of each type. Firstly, by considering the primary usage pattern and maximum CR link hold-time, we derived three new metrics MET, RH and METRH to capture different end-to-end performances. We categorized these metrics as the first type. Then, interference caused by periodic sensing was introduced. We derived a novel metric LTP to reflect this interference and categorized this metric as the second type. Finally, by making trade-off between end- to-end performances and interference to the primary users, we proposed metrics METI, RHI and METRHI which belong to the third type of routing metric. Simulation results indicate our proposed metrics of the first two types can accurately capture the performances they attempt to reflect. And all the proposed metrics outperform the traditional Minimum Hop metric (MH) in the considering performances by a large margin.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124654301","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: 28
Post Waveguide Filters with Compact Shorting Stubs 具有紧凑型短路桩的后波导滤波器
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.75
Rongjun Liu, Qingyuan Wang, Hong Li
{"title":"Post Waveguide Filters with Compact Shorting Stubs","authors":"Rongjun Liu, Qingyuan Wang, Hong Li","doi":"10.1109/ICCSC.2008.75","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.75","url":null,"abstract":"Economical compact filters using posts and shorting stubs have been proposed in this paper. The concept of capacity-loaded shorting stubs has been suggested to minimize the bulky and complicated shorting stubs. CAD simulations and tested results from a sample filter will be presented in this paper. Compared with conventional direct-coupled waveguide filter, the filter length can be decreased by a factor of more than 3.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124806529","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: 6
Multiple Antennas and Multipass Structure for Adaptive Duplicated Filters and Interference Canceller in WCDMA Systems WCDMA系统中自适应重复滤波器和干扰消除的多天线和多通结构
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.35
F. Nougarou, D. Massicotte, M. Ahmed-Ouameur
{"title":"Multiple Antennas and Multipass Structure for Adaptive Duplicated Filters and Interference Canceller in WCDMA Systems","authors":"F. Nougarou, D. Massicotte, M. Ahmed-Ouameur","doi":"10.1109/ICCSC.2008.35","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.35","url":null,"abstract":"An adaptive multistage multiuser detection (MUD) method namely adaptive duplicated filters and interference canceller (ADIC), has been proposed in a uplink WCDMA context. It was shown that ADIC approach provides, in a single receive antenna scenario, the same performance as the decision feedback soft multistage parallel interference canceller (DF-soft-MPIC) while affording a complexity reduction by a factor of 4. This paper proposes and analyses new versions of ADIC: the first efficiently takes into account the diversity offered by in a multiple receiving antennas context and the second aims at improving the performance based on multipass channel estimation and joint ADIC MUD, referred herein as MADIC. With respect to performance and implementation complexity trade-offs, MADIC presents a good avenue for WCDMA base station compared to DF-soft-MPIC.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122962617","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
Design and Optimization of 20 GHz LC-VCOs in SiGe:C BiCMOS Technology 基于SiGe:C BiCMOS技术的20ghz lc - vco设计与优化
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.143
J. Verdier, J.C.N. Perez, C. Gontrand
{"title":"Design and Optimization of 20 GHz LC-VCOs in SiGe:C BiCMOS Technology","authors":"J. Verdier, J.C.N. Perez, C. Gontrand","doi":"10.1109/ICCSC.2008.143","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.143","url":null,"abstract":"The design and analysis of fully integrated voltage controlled oscillators (VCO) for 20 GHz low cost and low power communication system is presented in this paper. Two differential topologies have been studied: balanced Colpitts VCO and LC-VCO using a cross-coupled differential pair. We have focussed on oscillation frequency, tuning range, phase noise, and output power optimization and buffer stage specifications. SiGe:C hetero-junction bipolar transistors of fT=55 GHz have been used and produced with a monolithic BiCMOS technology.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122984778","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
Service Differentiation for the Bandwidth Request Scheme in Fixed IEEE 802.16 Networks IEEE 802.16固定网络中带宽请求方案的业务区分
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.157
Kai Chen, Yi Zhou, Jianhua He, Zuoyin Tang
{"title":"Service Differentiation for the Bandwidth Request Scheme in Fixed IEEE 802.16 Networks","authors":"Kai Chen, Yi Zhou, Jianhua He, Zuoyin Tang","doi":"10.1109/ICCSC.2008.157","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.157","url":null,"abstract":"IEEE 802.16 standards have been developed as one of the technical solutions for broadband wireless access systems. It has high data rate, large network coverage, flexible QoS schemes and cheap network deployment. Various flexible mechanisms related to QoS provisioning have been specified for uplink traffic at the medium access control (MAC) layer in the standards. Among the mechanisms, contention based bandwidth request scheme can be used to indicate bandwidth demands to the base station for the non-real-time polling and best- effort services. These two services are used for most application with unknown traffic characteristics. Due to the diverse QoS requirements of those applications, service differentiation (SD) is anticipated over the contention based bandwidth request scheme. In this paper we investigate the SD with the bandwidth request scheme by means of assigning different channel access parameters and bandwidth allocation priorities. The effectiveness of the differentiation schemes are evaluated by simulations. It is observed that the initial backoff window can be efficient in SD, and if combined with the bandwidth allocation priority, the SD performances will be better.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127208564","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
Probability-Based Rake Receiver in Ultra-Wideband Multiple Access Systems 超宽带多址系统中基于概率的Rake接收机
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.113
A. Falahati, F. Mohamadi, F. H. Panahi
{"title":"Probability-Based Rake Receiver in Ultra-Wideband Multiple Access Systems","authors":"A. Falahati, F. Mohamadi, F. H. Panahi","doi":"10.1109/ICCSC.2008.113","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.113","url":null,"abstract":"This paper proposes probability-based rake receiver (PRR) as a new concept of error concealment in ultra-wideband multiple access systems in the presence of frequency-selective fading according to the COST 207 channel model. To form a beam pattern, after despreading with specified user code and signal integrating by a bank of integrator, signal weights are calculated based on signal strength at each finger of rake receiver. Afterward, the matched signals are summed up with maximal-ratio combining and are passed through frame decision unit (FDU), which requires additionally a priori information in terms of estimated bit error probabilities. In fact, we exploit a practical rake combining scheme and probability- based error degradation technique before any decoding applications. Monte Carlo simulations have been used to evaluate the receiver bit-error rate performance in frequency- selective mobile radio channel environments.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127327189","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
Ensuring Feasibility of Wireless Sensor Networks 确保无线传感器网络的可行性
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.185
Simone Campanoni, W. Fornaciari
{"title":"Ensuring Feasibility of Wireless Sensor Networks","authors":"Simone Campanoni, W. Fornaciari","doi":"10.1109/ICCSC.2008.185","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.185","url":null,"abstract":"A comprehensive WSNs (wireless sensor networks) design methodology should deserve enough effort to select a suitable set of sensors with a proper spatial distribution, in order to ensure a correct monitoring of the parameters relevant for the application. The goal of this paper is to show how it is possible a priori ensuring that a given WSN is actually capable to satisfy the application requirements. In addition to this, the flexibility of the approach is also demonstrated by evaluating the sensitivity of the WSN performance to parameters like sensors distribution, observation time and the events to be analyzed. This paper presents the overall design methodology implemented in SWORDFISH (sensor networks development framework integrating simulation and hardware optimization) and some representative case studies.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131585439","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
Study on Capacity of BLAST System with Error Propagation 考虑误差传播的BLAST系统容量研究
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.89
Zhanjun Jiang, Wen Pan, Dongming Wang, X. You
{"title":"Study on Capacity of BLAST System with Error Propagation","authors":"Zhanjun Jiang, Wen Pan, Dongming Wang, X. You","doi":"10.1109/ICCSC.2008.89","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.89","url":null,"abstract":"The capacity of the BLAST system is larger than that of a single antenna system, but error propagation affects the BLAST architecture capacity. The ergodic capacity is analyzed of BLAST architecture with error propagation (EP-BLAST). We find that in EP-BLAST system, the diversity orders of all symbols transmitted by different antenna are same, which are equal to the smallest diversity order of the symbol in error-free BLAST (EF-BLAST). Since it is difficult to obtain a closed-form solution of the ergodic capacity of EP-BLAST, the upper-bound of the capacity is achieved in this paper.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"285 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134105675","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
Carrier Frequency Offset Estimation in Multiantenna Transmission Systems Based on Single-Carrier Modulation 基于单载波调制的多天线传输系统载波频偏估计
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.92
Yaning Zou, M. Valkama, M. Renfors
{"title":"Carrier Frequency Offset Estimation in Multiantenna Transmission Systems Based on Single-Carrier Modulation","authors":"Yaning Zou, M. Valkama, M. Renfors","doi":"10.1109/ICCSC.2008.92","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.92","url":null,"abstract":"The implementation challenges in building compact and low-cost radios for future wireless systems are continuously growing. This is partially due to the introduction of multiantenna transmission techniques, calling for several parallel radio implementations in a single terminal, with considerably reduced implementation resources (size and cost) for individual radios. In this context, one important aspect is the so-called \"dirty RF\" theme stemming from the unavoidable physical limitations of the used analog electronics. This has started to draw wide attention in both academic and industrial communities. One concrete example is the carrier frequency offset (CFO) problem, caused by frequency instability of the used oscillators and the mobility of the terminals, which can severely degrade the system performance. In this paper, we consider the CFO estimation problem in multi-antenna system context utilizing single-carrier modulation. One efficient pilot based algorithm with built-in diversity against fading channel state is proposed and a lower bound for the estimation error variance is derived analytically. This analysis reveals additional elements for further improving the estimator performance, in terms of pilot structure design. Extensive computer simulations are then used to further assess the estimator performance and to verify the analysis results.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132541524","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
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