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

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Iterative Methods for Blind Carrier Frequency Offset Estimation in OFDMA Uplink OFDMA上行链路载波频偏盲估计的迭代方法
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.98
Yi-Fan Wang, Yung-Fang Chen
{"title":"Iterative Methods for Blind Carrier Frequency Offset Estimation in OFDMA Uplink","authors":"Yi-Fan Wang, Yung-Fang Chen","doi":"10.1109/ICCSC.2008.98","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.98","url":null,"abstract":"Blind carrier frequency offset (CFO) estimation algorithms in orthogonal frequency division multiple access (OFDMA) systems have been discussed in the literature recently. In [1], the blind estimation scheme has drawn a lot of attention, but the computational complexity caused by the MUSIC exhaustive search is high. Therefore, an iterative scheme is proposed in this paper to reduce the computational complexity while maintaining comparable performance. The simulation results demonstrate the efficacy of the proposed scheme and that the performance is near to the Cramer-Rao bound (CRB).","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"1081 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":"122898070","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
A Novel BiST and Calibration Technique for CMOS Down-Converters 一种新型CMOS下变频器的自适应标定技术
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.181
S. Rodriguez, A. Rusu, Lirong Zheng, M. Ismail
{"title":"A Novel BiST and Calibration Technique for CMOS Down-Converters","authors":"S. Rodriguez, A. Rusu, Lirong Zheng, M. Ismail","doi":"10.1109/ICCSC.2008.181","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.181","url":null,"abstract":"This paper presents a new digital calibration methodology that allows CMOS Gilbert cell down-converters to meet their block specifications under large process, temperature and power supply variations. The calibration method consists of a novel built-in self test for direct conversion receivers that is able to measure the gain, and the second and third order intermodulation products of the mixer. A random optimizer algorithm based on a least square error function provides digital control of the biasing circuit and the loads of the mixer. The gain and IIP3 are calibrated by regulating the current of the input differential pair and by switching the loads. IIP2 calibration is achieved by using a novel technique that consists of offset voltages cancellation in the switching pairs. The technique is validated by calibrating a 0.18 um CMOS mixer in several corner conditions.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"166 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":"128985431","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
Differential Power Analysis Attack on SMS4 Block Cipher SMS4分组密码的差分功率分析攻击
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.136
Xuefei Bai, Li Guo, Tie Li
{"title":"Differential Power Analysis Attack on SMS4 Block Cipher","authors":"Xuefei Bai, Li Guo, Tie Li","doi":"10.1109/ICCSC.2008.136","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.136","url":null,"abstract":"SMS4 is a 128-bit block cipher used in the WAPI standard for protecting data packets in WLAN. In this paper, a differential power analysis attack method on every byte of round keys is presented. Through this attack, the round keys of the last four rounds of SMS4 can be obtained, and then the 128- bit encryption key can be found out. The results of simulation experiments indicate that this attack is effective and practical on the SMS4 cipher.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"1 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":"130153045","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
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
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