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

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An Efficient Dynamic Channel Assignment with Channel Locked for TDD-CDMA Systems TDD-CDMA系统中一种有效的信道锁定动态分配方法
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.81
Zhihua Zheng
{"title":"An Efficient Dynamic Channel Assignment with Channel Locked for TDD-CDMA Systems","authors":"Zhihua Zheng","doi":"10.1109/ICCSC.2008.81","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.81","url":null,"abstract":"Time division duplex (TDD) is an efficient approach to combat the traffic asymmetry issues via adapting the resource (time slots) for uplink and downlink in TDD-CDMA systems. However, the cross-slot interference is caused by the asymmetry traffic between mobile subscribers and base stations, which can seriously degrade the system performance. In this paper, an efficient dynamic channel assignment with channel locked (DCA/CL) is investigated for TDD-CDMA communication systems. The cell is divided into three sections by directional antennas. The above tri-sector cell architecture possesses additional orthogonality inherently due to the directivity of directional antenna, which can provide an additional degree of freedom in allocating radio resource with the channel locked directly in the section of the neighbor cell. Further, the proposed scheme is combined with transmission power control to decrease the interference, and is also evaluated by computer simulation. The results show it efficiently reduces the failure probability and achieves better system performance.","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":"132498476","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
Comparison of Two Suboptimal SISO Iterative Demodulators: LMMSE Estimation and Vector Gaussian Approximation 两种次优SISO迭代解调方法的比较:LMMSE估计和向量高斯逼近
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.59
Guomei Zhang, Shihua Zhu, Shaopeng Wang
{"title":"Comparison of Two Suboptimal SISO Iterative Demodulators: LMMSE Estimation and Vector Gaussian Approximation","authors":"Guomei Zhang, Shihua Zhu, Shaopeng Wang","doi":"10.1109/ICCSC.2008.59","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.59","url":null,"abstract":"The linear minimum mean-square error (LMMSE) estimator and the vector Gaussian approximation (GA) demodulator are two popular low-complexity suboptimal SISO demodulating methods for soft interference cancellation based iterative detection. In this paper, the equivalence of the two demodulation methods is established. In addition, the complexities of the two demodulators with arbitrary mapping constellations are reduced by reducing the number of matrix inverse operations in the preceding block processing. The comparison of the computational complexities demonstrates that the LMMSE demodulator is simpler than the one using the vector GA algorithm. Since the performances of the two methods are equivalent, the less complex LMMSE method has the advantage over the vector GA one for the SISO iterative detection.","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":"125325501","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
An Improved Scheme for Multiple Access Differential Chaos-Shift Keying System 多址差分混沌移位键控系统的改进方案
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.83
Ying Shi, Yiping Chen, Yigang Zhou, Y. Liu
{"title":"An Improved Scheme for Multiple Access Differential Chaos-Shift Keying System","authors":"Ying Shi, Yiping Chen, Yigang Zhou, Y. Liu","doi":"10.1109/ICCSC.2008.83","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.83","url":null,"abstract":"In this paper, a modified multiple-access scheme is proposed and analyzed on the base of the time-delay-based multiple-access technique using differential chaos shift keying (DCSK). Zero-mean Logistic chaos map with different initial values is used to generate the chaotic signals for all users and the average data rates for the users are identical. Bit error rates are derived numerically for different number of users, spreading factor, and the bit-energy-to -noise-power-spectral-density ratio under AGWN channel model or multipath Rayleigh fading channel model. Finally, computer simulations are performed to verify the results.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"18 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":"125419916","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
Performance Evaluation of a Hybrid FEC/ARQ for Wireless Media Streaming 混合FEC/ARQ无线流媒体性能评估
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.26
Yong Jin, Guangwei Bai, Peng Zhang, Hang Shen, Junyuan Wang
{"title":"Performance Evaluation of a Hybrid FEC/ARQ for Wireless Media Streaming","authors":"Yong Jin, Guangwei Bai, Peng Zhang, Hang Shen, Junyuan Wang","doi":"10.1109/ICCSC.2008.26","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.26","url":null,"abstract":"This paper proposes a link-level hybrid FEC/ARQ based on an adaptive forward error correction (adaptive FEC) algorithm for wireless media streaming, in the hope that the media could be played on receivers with high quality. This model, which uses adaptive forward error correction mechanism at the application layer to adjust to the current network condition, can maximize the performance of wireless multimedia communication. Our simulation results and mathematical analysis show that the hybrid FEC/ARQ achieves better quality of media streaming comparing with FEC alone and ARQ alone, in terms of playable frame rate, reliability and real-time performance on the receiving side.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"58 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":"126676125","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: 13
Implementation of Software Radio Based on PC and FPGA 基于PC和FPGA的软件无线电实现
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.140
M. Rakhshanfar, M. Teimouri, Z. HassanShahi
{"title":"Implementation of Software Radio Based on PC and FPGA","authors":"M. Rakhshanfar, M. Teimouri, Z. HassanShahi","doi":"10.1109/ICCSC.2008.140","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.140","url":null,"abstract":"This paper introduces a flexible real-time software radio using a personal computer (PC) and single FPGA with a solution for frequency hopping under non open-source operating systems like Windows. All parts of this hardware are easily accessible and all of the software layers can be implemented in PC. Universal serial bus (USB) interfaces are used to communicate with hardware, so laptop computers are able to realize this system. A demonstration test bed of global system for mobile (GSM) receiver is implemented based on this idea and the system performance is then presented.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"10 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":"128105768","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
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
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