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

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A Programmable Lattice-Reduction Aided Detector for MIMO-OFDMA 一种用于MIMO-OFDMA的可编程格降辅助检测器
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.68
Di Wu, J. Eilert, Dake Liu
{"title":"A Programmable Lattice-Reduction Aided Detector for MIMO-OFDMA","authors":"Di Wu, J. Eilert, Dake Liu","doi":"10.1109/ICCSC.2008.68","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.68","url":null,"abstract":"This paper presents the first programmable Lattice- Reduction Aided (LRA) symbol detector for Multiple-Input Multiple-Output (MIMO) and Orthogonal Frequency Division Multiple Access (OFDMA). The detector proposed is implemented using 65 nm ASIC technologies. Owing to the programmability, the detector can be dynamically switched between linear (e.g. MMSE) and lattice-reduction aided (e.g. LRA-MMSE) detectors by simply running another software subroutine. Therefore, it allows a good trade-off between performance and computational latency to be achieved under various scenarios. Along with the hardware, two algorithm simplifications (SCNT-LR and SOT-LR) are proposed for finding subcarriers with ill- conditioned channel matrices. And in the end, interpolated LR (I- LR) is proposed to further reduce the computational complexity for real-time implementations.","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":"115866163","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: 17
Improved Signal Constellations for Differential Unitary Space-Time Modulation with Three Transmit Antennas 三发射天线差分酉空时调制的改进信号星座
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.93
Z. Du, Jiee Chen, Dongming Wang, Zhanjun Jiang, Xiqi Gao
{"title":"Improved Signal Constellations for Differential Unitary Space-Time Modulation with Three Transmit Antennas","authors":"Z. Du, Jiee Chen, Dongming Wang, Zhanjun Jiang, Xiqi Gao","doi":"10.1109/ICCSC.2008.93","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.93","url":null,"abstract":"In this paper, we propose new and improved unitary signal constellations for differential unitary space-time modulations system employing three transmit antennas. The proposed unitary design is constructed from fundamental building block which comprises the generator matrix of diagonal cyclic codes, and the 3times3 rotational matrix. Simulation results show that the union bounds on the pairwise error probability (PEP) of the proposed constellations are superior to those of previously proposed Givens rotation based ones.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"8 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":"131704300","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
A Novel Internetworking Architecture between WLAN and UMTS Cellular Networks using RoF Technique 一种基于RoF技术的无线局域网与UMTS蜂窝网络的新型互联网络架构
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.152
Mingxin Chen, Gan Liu, Guangxi Zhu, Xu Zhu
{"title":"A Novel Internetworking Architecture between WLAN and UMTS Cellular Networks using RoF Technique","authors":"Mingxin Chen, Gan Liu, Guangxi Zhu, Xu Zhu","doi":"10.1109/ICCSC.2008.152","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.152","url":null,"abstract":"The next generation networks are designed to provide ubiquitous access networks to mobile users. Users may require various data rates and quality of service (QoS) in different places. The integrating of wireless cellular network and wireless local area network (WLAN) can take full advantage of each other, and provides consumers with much more comprehensive wireless service. In this paper, a novel internetworking architecture between WLAN and UMTS cellular networks with Radio-over-Fiber (RoF) technique is proposed. Based on RoF technique, we can locate the WLAN server in the Base Station (BS) of UMTS, and Mobile Node can always connect with BS whether it is in UMTS or WLAN. In particular, algorithms for intersystem communications and vertical handover management in this architecture are also proposed. The former algorithm decreases the signaling burden for the UMTS core network or core Internet. And the later one significantly reduces the latency in vertical handover.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"212 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":"133736515","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: 9
A Novel Scheme for Channel State Information Feedback in MIMO-OFDMA System MIMO-OFDMA系统中一种新的信道状态信息反馈方案
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.50
Yanchun Li, Senjie Zhang, Hongming Zheng, Xiaoyun Wu
{"title":"A Novel Scheme for Channel State Information Feedback in MIMO-OFDMA System","authors":"Yanchun Li, Senjie Zhang, Hongming Zheng, Xiaoyun Wu","doi":"10.1109/ICCSC.2008.50","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.50","url":null,"abstract":"The exceeding performance of Close-Loop MIMO scheme over Open-Loop one is attractive. However, the large size of Channel State Information (CSI) feedback to transmitter is its major drawback. To reduce this cost, many works have been done on CSI feedback design in frequency domain for MIMO-OFDM systems. We propose a scheme which represents the CSI in temporal domain. Based on that the channel is inherent formed by numbers of taps, it is efficient to take few dominant ones. Many multiuser systems take advantage of frequency diversity by allocating only subset of subcarriers to a user, so user can only send feedback on subcarriers of its preferred resource blocks. We improve our channel impulse response (CIR) feedback scheme to let the counterpart of temporal response by DFT focus on these resource blocks of interest (RBol). Performance evaluation has been taken on 3GPP Spatial Channel Model. Simulation shows that the performance of temporal response emphasized on RBoIs exceeds that of Channel Frequency Response with same size and is comparable to the Channel Frequency Response based scheme with higher frequency resolution.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"503 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":"133178422","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
Convolutionally Encoded TH-BPSK UWB System over Multipath Channels 多径信道上卷积编码TH-BPSK超宽带系统
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.118
Zhiquan Bai, Yingji Zhong, D. Yuan, K. Kwak
{"title":"Convolutionally Encoded TH-BPSK UWB System over Multipath Channels","authors":"Zhiquan Bai, Yingji Zhong, D. Yuan, K. Kwak","doi":"10.1109/ICCSC.2008.118","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.118","url":null,"abstract":"This work pays attention to the performance analysis of the conventional and encoded time hopping binary phase shift keying modulation (TH-BPSK) ultra wideband systems over multipath fading channels. In order to resist the multipath effects, selective diversity combining Rake (SRake) receiver is employed. The encoded TH-BPSK UWB system is obtained by substituting a convolutional encoder for the repetition encoder. Soft output Viterbi algorithm (SOVA) and Viterbi algorithm (VA) are employed as the decoding methods. The performance analysis shows that the coded TH-BPSK system outperforms the uncoded scheme significantly with the increase of the SRake receiver fingers. The effective order of processing gains achieved by the coded scheme is the product of the number of SRake branches and the free distance of the convolutional code.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"14 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":"133720682","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
Impacts of UWB Interference on Selected Radio Systems used by the Government 超宽频干扰对政府选定无线电系统的影响
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.117
S.S.M. Wong, F. Lau
{"title":"Impacts of UWB Interference on Selected Radio Systems used by the Government","authors":"S.S.M. Wong, F. Lau","doi":"10.1109/ICCSC.2008.117","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.117","url":null,"abstract":"In view of the big boost of the global evolvement of UWB technology, the motivation of this paper is to investigate its possible interference impacts on some of the existing radio systems commonly deployed for government applications. It is sensible to expect all the existing services should survive when there is a new comer to share the precious resources of spectrum. Unfortunately this study together with many others show that it may not be the case. Typical application scenarios are modeled for interference analysis resembling realistic deployments. Two government radio systems are selected for study. One is a terrestrial fixed microwave link which is rather robust in an environment with UWB interference because of its highly directional antenna. The second system is a digital broadband radio working in the public safety band which suffers significantly from shortened useable range or degraded data throughout.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"13 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":"117321050","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
Synchronization Technique Research of Chinese DTTB Standard 中国DTTB标准同步技术研究
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.159
Yuefeng Li, Xin Wei, Li Zhao, Xiaohuan Yan
{"title":"Synchronization Technique Research of Chinese DTTB Standard","authors":"Yuefeng Li, Xin Wei, Li Zhao, Xiaohuan Yan","doi":"10.1109/ICCSC.2008.159","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.159","url":null,"abstract":"Chinese Digital Television Terrestrial Broadcasting System Standard has been published in August, 2006. Correct time and frequency synchronization are important for the performance of receiving terminal supporting this standard. In this paper, some fundamental contents of this standard are introduced and two new synchronization algorithms suitable for multi-carrier mode and single carrier mode respectively are proposed. Besides, we analyze the key points of synchronization design and compare the performance of these two algorithms by simulation. The future research directions of the synchronization scheme of the standard are also given.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"14 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":"116209640","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
Modular Design and Implementation of FPGA-Based Tap-Selective Maximum-Likelihood Channel Estimator 基于fpga的分路选择最大似然信道估计器的模块化设计与实现
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.145
Jeng-Kuang Hwang, Yuan-Ping Li
{"title":"Modular Design and Implementation of FPGA-Based Tap-Selective Maximum-Likelihood Channel Estimator","authors":"Jeng-Kuang Hwang, Yuan-Ping Li","doi":"10.1109/ICCSC.2008.145","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.145","url":null,"abstract":"The modular design of the optimal tap-selective maximum-likelihood (TS-ML) channel estimator based on field- programmable gate array (FPGA) technology is studied. A novel range reduction algorithm is included in the natural logarithmic function (NLF) emulator based on the coordinate rotation digital computer (CORDIC) methodology and is integrated into the TS- L channel estimator system. The low-complexity TSML algorithm, which is employed for sparse multipath channel estimation, is proposed for long-range broadband block transmission systems. Furthermore, the proposed range reduction algorithm aims to solve the limited interval problem in the CORDIC algorithm. The modular approach facilitates the reuse of modules.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"24 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":"125164299","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
Design and Analysis of Wireless Systems using CAC and M-QAM Adaptive Modulation for Throughput Improvement 利用CAC和M-QAM自适应调制提高吞吐量的无线系统设计与分析
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.60
N. Aboutorab, A. Mohammadi
{"title":"Design and Analysis of Wireless Systems using CAC and M-QAM Adaptive Modulation for Throughput Improvement","authors":"N. Aboutorab, A. Mohammadi","doi":"10.1109/ICCSC.2008.60","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.60","url":null,"abstract":"In this paper we introduce an effective bandwidth- based Call Admission Control (CAC) with adaptive modulation technique to manage the traffic in a wireless IP-based network. Since the next generation of communication networks will carry different classes of traffic, e.g., voice, video, fax, data and multimedia, over the same network and these different classes of traffic usually require different quality-of-service (QoS) requirements, the CAC plays an important role in future networks. Furthermore, to enhance the throughput in future wireless communication and efficiently use of the physical resources of the network, we take the advantage of using adaptive modulation M-QAM in order to match transmission rates to time-varying channel conditions. The simulation results show the performance of the proposed architecture.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"4 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":"123994480","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
New Nonlinear Circuit Models for Power BAW Resonators 功率BAW谐振器非线性电路新模型
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.133
F. Constantinescu, M. Nitescu, A. Gheorghe
{"title":"New Nonlinear Circuit Models for Power BAW Resonators","authors":"F. Constantinescu, M. Nitescu, A. Gheorghe","doi":"10.1109/ICCSC.2008.133","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.133","url":null,"abstract":"New nonlinear circuits, modeling both the amplitude-frequency effect and the intermodulation effect are described. One model is validated using the measured dependence of the series resonance frequency on the incident power.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"167 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":"128346627","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
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