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

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Joint Route and Power Allocation in Cooperative-Multihop Networks 合作多跳网络中的联合路由和功率分配
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.31
Jiangbo Si, Zan Li, Zengji Liu, Xiaofeng Lu
{"title":"Joint Route and Power Allocation in Cooperative-Multihop Networks","authors":"Jiangbo Si, Zan Li, Zengji Liu, Xiaofeng Lu","doi":"10.1109/ICCSC.2008.31","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.31","url":null,"abstract":"In this paper, we address the problem of joint optimization of route and power allocation in cooperative- multihop networks, where a source node wants to transmit a sequence of messages to a single destination node out of the range of direct transmission. We first study the optimal power allocation between the single source node and single relay with DF (decode and forward) protocol in multihop transmission. Then under the assumption that intermediate node can adaptively select transmission scheme between DT(direct transmission) and DF , a heuristic algorithm is proposed to find a good route and allocate power efficiently for the minimum outage probability with a given power budget. Finally, our simulation results show that cooperative-multihop transmission outperforms the non-cooperative-multihop transmission, and the proposed algorithm can achieve lower outage probability compared to the equal power allocation with shortest path.","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":"131084367","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
Modeling and Measuring of Weak Frequency Selectivity in OFDM Modulator OFDM调制器弱频率选择性的建模与测量
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.95
Song Mao, Kewu Peng, Jian Song
{"title":"Modeling and Measuring of Weak Frequency Selectivity in OFDM Modulator","authors":"Song Mao, Kewu Peng, Jian Song","doi":"10.1109/ICCSC.2008.95","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.95","url":null,"abstract":"Weak frequency selectivity in OFDM modulator is usually caused by imperfect D/A conversion and non-ideal filtering. Due to the weakness of this inherent frequency selectivity in OFDM modulator, it is hard to estimate the impact of this frequency selectivity in the output of modulator under the influence of circuit noise, which presents a challenge in performance evaluation of OFDM modulator. In this paper, this inherent weak frequency selectivity on modulator output signal is illustrated and analyzed and an experimental base-band model is proposed to well describe the weak frequency selectivity in OFDM modulator. Finally, this model is applied to evaluate a high performance TDS-OFDM modulator with weak frequency selectivity. After the estimation and equalization of the inherent weak frequency selectivity, the MER measure result could reflect the performance of this modulator much more precisely.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"37 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":"130053489","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
OLSR Mesh Networks for Broadband Access: Enhancements, Implementation and Deployment 宽带接入的OLSR网状网络:增强、实现和部署
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.175
F.Y. Li, L. Vandonif, G. Ziccaf, S. Zanoli
{"title":"OLSR Mesh Networks for Broadband Access: Enhancements, Implementation and Deployment","authors":"F.Y. Li, L. Vandonif, G. Ziccaf, S. Zanoli","doi":"10.1109/ICCSC.2008.175","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.175","url":null,"abstract":"In the context of an EU FP6 project, ADHOCSYS, we have developed a reliable and cost-effective solution for broadband Internet access in rural and mountainous areas. This solution is built based on multi-hop wireless mesh networking technologies and covers many aspects such as routing, reliability, QoS, security, self-configuration, self-healing, remote network monitoring, power management etc. In this paper, we present solely the routing aspect of the developed mesh network, focusing on new routing features that have been designed, implemented, and deployed in a real-life operational network. These new features are developed based on an extended version of the OLSR protocol. The test results are also presented in the paper.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"48 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114047900","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: 14
Design and Optimization of an MB-OFDM Ultra-Wideband Receiver Front-End 一种MB-OFDM超宽带接收机前端设计与优化
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.112
Yanmei Li, Chang-Ching Wu, A. Sangiovanni-Vincentelli, J. Rabaey
{"title":"Design and Optimization of an MB-OFDM Ultra-Wideband Receiver Front-End","authors":"Yanmei Li, Chang-Ching Wu, A. Sangiovanni-Vincentelli, J. Rabaey","doi":"10.1109/ICCSC.2008.112","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.112","url":null,"abstract":"The design of an MB-OFDM ultra-wideband receiver is challenging when we target power consumption minimization while providing enough robustness against the nearby wireless interference. We present an optimized receiver front-end design obtained by a systematic design space exploration technique based on the platform-based design (PBD) methodology. At the system level, we investigate the interference effects and propose an approach to estimate the inter-modulation products introduced by receiver nonlinearities. We show how we map the system-level performance requirements to circuit-level platforms through an optimization process. We obtain a RF front-end consuming 10.8 mW in a 0.13 mum CMOS technology, which achieves a 22.3% savings of power compared to a manually optimized design.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"39 16","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120822433","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
The Demodulation of Non-Orthogonal Multiple Modulation Based All Phase 基于全相位的非正交多重调制解调
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.56
C. Lei, Shanlin Sun
{"title":"The Demodulation of Non-Orthogonal Multiple Modulation Based All Phase","authors":"C. Lei, Shanlin Sun","doi":"10.1109/ICCSC.2008.56","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.56","url":null,"abstract":"Non-orthogonal Multiple Modulation (NOMM ) is different from the traditional modulation and is very efficient. To solve the problems like complicate modulation, huge calculation and low accuracy, All Phase Fast Fourier Transform (APFFT) is presented in this paper. And this method is proved correct in theory. The experiment shows that it is reasonable, and can keep high accuracy even in high noise conditions.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"50 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":"116608785","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
Investigating the Load Balance of Multi-Path Routing to Increase the Lifetime of a MANET 研究多路径路由的负载平衡以增加MANET的生存期
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.30
A. Bannack, L. Albini
{"title":"Investigating the Load Balance of Multi-Path Routing to Increase the Lifetime of a MANET","authors":"A. Bannack, L. Albini","doi":"10.1109/ICCSC.2008.30","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.30","url":null,"abstract":"Multi-path routing can provide higher bandwidth and better packet delivery ratio for multimedia applications than traditional shortest path routing protocols. Multi-path routing protocols try to use multiple simultaneous paths to transfer data messages. While it might increase the bandwidth and the delivery ratio, it also distributes the traffic load more evenly over the network. This load balance can be used to increase the lifetime of a MANET, as it will avoid using only one route for many times. This article explores the load balance technique showing that it is possible to increase the network lifetime up to 22 minutes using this technique alone. The energy consumption of a MANET unit can be split into control (59%), data (34%) and routing (7%) packets. The energy used only by the network interface card can also be separated into the energy used by sending or receiving packets, in this case approximately 89% is used to receive packets. All these values were obtained through simulations on GloMoSim, performed using real values from a Compaq WL110 network interface card connected to an HP IPAQ 3600 handheld.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"26 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":"117135901","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: 7
Adaptive Medium Access Control for VoIP Services in IEEE 802.11 WLANs IEEE 802.11无线局域网中VoIP业务的自适应介质访问控制
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.109
M. Abu-Tair, G. Min, Q. Ni, Hong Liu
{"title":"Adaptive Medium Access Control for VoIP Services in IEEE 802.11 WLANs","authors":"M. Abu-Tair, G. Min, Q. Ni, Hong Liu","doi":"10.1109/ICCSC.2008.109","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.109","url":null,"abstract":"Voice over Internet Protocol (VoIP) is an important service with strict quality-of-service (QoS) requirements in wireless local area networks (WLANs). The popular distributed coordination function (DCF) of IEEE 802.11 medium access control (MAC) protocol adopts a binary exponential back-off (BEB) procedure to reduce the packet collision probability in WLANs. In DCF, the size of contention window is doubled upon a collision regardless of the network loads. This paper presents an adaptive MAC scheme to improve the QoS of VoIP in WLANs. This scheme applies a threshold of the collision rate to switch between two different functions for increasing the size of contention window based on the status of network loads. The performance of this scheme is investigated and compared to the original DCF using the network simulator NS-2. The performance results reveal that the adaptive scheme is able to achieve the higher throughput and medium utilization as well as lower access delay and packet loss probability than the original DCF.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"36 2 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":"117324752","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
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
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