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2009 International Conference on Advanced Technologies for Communications最新文献

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MSE based antenna selection for MIMO-SDM systems 基于MSE的MIMO-SDM系统天线选择
2009 International Conference on Advanced Technologies for Communications Pub Date : 2009-12-08 DOI: 10.1109/ATC.2009.5349320
T. T. Bui, X. Tran, T. Fujino
{"title":"MSE based antenna selection for MIMO-SDM systems","authors":"T. T. Bui, X. Tran, T. Fujino","doi":"10.1109/ATC.2009.5349320","DOIUrl":"https://doi.org/10.1109/ATC.2009.5349320","url":null,"abstract":"Antenna selection is a promising technique which provides performance improvement for multiple input multiple output (MIMO) systems at low cost of additionally employed antennas and signal processing. Various antenna selection algorithms based on different criteria have been proposed in the literature. This paper presents a new antenna selection algorithm for MIMO spatial division multiplexing (MIMO-SDM) systems which uses the mean square error (MSE) as a criterion for selecting the best subset of transmit/receive antennas to improve the system error performance. The proposed algorithm helps to achieve lower the bit error rate (BER) for MIMO-SDM systems with linear detectors compared with the previous channel matrix norm based and signal to noise ratio (SNR) based selection algorithms. Compared with the SNR based algorithm, the proposed algorithm provides double diversity gain in receive antenna selection systems and the same diversity order but about 1dB SNR gain in transmit antenna selection systems.","PeriodicalId":311235,"journal":{"name":"2009 International Conference on Advanced Technologies for Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130729594","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
Thermal techniques to improve ZnO-based FBAR devices characteristics 提高zno基FBAR器件特性的热技术
2009 International Conference on Advanced Technologies for Communications Pub Date : 2009-12-08 DOI: 10.1109/ATC.2009.5349577
Linh Mai, Ngoc-Hung Do, T. Hoang, Van-Su Tran, Lan-Phuong Bui Pham, T. Nguyen Thi, Hung Ngoc Le
{"title":"Thermal techniques to improve ZnO-based FBAR devices characteristics","authors":"Linh Mai, Ngoc-Hung Do, T. Hoang, Van-Su Tran, Lan-Phuong Bui Pham, T. Nguyen Thi, Hung Ngoc Le","doi":"10.1109/ATC.2009.5349577","DOIUrl":"https://doi.org/10.1109/ATC.2009.5349577","url":null,"abstract":"The paper presents some methods to improve characteristics of film bulk acoustic resonator (FBAR) devices. The FBAR devices were fabricated on Bragg reflectors. Thermal treatments were done by sintering and/or annealing processes. The measurement showed a considerable improvement of return loss (S11) and quality factor (Qs/p). These thermal treatment techniques seem very promising for enhancing FBAR resonance performance.","PeriodicalId":311235,"journal":{"name":"2009 International Conference on Advanced Technologies for Communications","volume":"36 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131998564","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
Extended class of reduced crossbar switches 简化交叉开关的扩展类
2009 International Conference on Advanced Technologies for Communications Pub Date : 2009-12-08 DOI: 10.1109/ATC.2009.5349382
H. Obara
{"title":"Extended class of reduced crossbar switches","authors":"H. Obara","doi":"10.1109/ATC.2009.5349382","DOIUrl":"https://doi.org/10.1109/ATC.2009.5349382","url":null,"abstract":"Reduced crossbar switches (RXBSs) with crosspoints between N2 and N(N-1)/2, where N is the switch size, were investigated from an architectural point of view. Conventional RXBSs have been created by removing parts of 2×2 switching cells from crossbar switches, while maintaining the switches' planar structure and wide-sense nonblocking property. In this paper, we consider an extended class of RXBSs that has a 3D structure or a rearrangeably nonblocking capability. We introduce such new RXBSs and discuss their performance.","PeriodicalId":311235,"journal":{"name":"2009 International Conference on Advanced Technologies for Communications","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133754568","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
Performance of bit-interleaved coded OFDM in power line communications with impulsive noise 有脉冲噪声的电力线通信中位交织编码OFDM的性能
2009 International Conference on Advanced Technologies for Communications Pub Date : 2009-12-08 DOI: 10.1109/ATC.2009.5349345
K. Al-Mawali, Z. M. Hussain
{"title":"Performance of bit-interleaved coded OFDM in power line communications with impulsive noise","authors":"K. Al-Mawali, Z. M. Hussain","doi":"10.1109/ATC.2009.5349345","DOIUrl":"https://doi.org/10.1109/ATC.2009.5349345","url":null,"abstract":"Noise in the power line channel can not be described by Additive White Gaussian Noise (AWGN). This channel suffers from impulsive noise and other narrow-band interferences. Impulsive noise, in particular, can degrade the performance of OFDM-based Power Line Communication (PLC) systems significantly. Therefore, channel coding is important to combat the impairments in this hostile medium. Interleaving can be integrated with coding to allow for a better exploitation of the capabilities of a coding scheme. In this paper, we study and simulate the performance of bit-interleaved convolutionally coded OFDM over PLC channels in the presence of impulsive noise. For our simulations, we adopt a widely accepted and practically proven channel model for broadband PLC. Three noise scenarios, namely “heavily disturbed”, “medium disturbed” and “weakly disturbed”, that are based on practical measurements are used to study the system performance by means of computer simulations.","PeriodicalId":311235,"journal":{"name":"2009 International Conference on Advanced Technologies for Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130742746","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: 15
Improving the behavior of an electro-optic modulator by controlling its temperature 通过控制电光调制器的温度来改善其性能
2009 International Conference on Advanced Technologies for Communications Pub Date : 2009-12-08 DOI: 10.1109/ATC.2009.5349256
D. Bui, L. D. Nguyên, B. Journet
{"title":"Improving the behavior of an electro-optic modulator by controlling its temperature","authors":"D. Bui, L. D. Nguyên, B. Journet","doi":"10.1109/ATC.2009.5349256","DOIUrl":"https://doi.org/10.1109/ATC.2009.5349256","url":null,"abstract":"The purpose of this paper is to present an improvement of the stability of an electro-optic modulator obtained from temperature control. A digital system developed with a PSOC microcontroller is used associated with a small power amplifier. The behavior of the modulator can be observed by the way of its nonlinear properties. By the thermal control of the modulator it is possible to reduce significantly the drift of the modulator.","PeriodicalId":311235,"journal":{"name":"2009 International Conference on Advanced Technologies for Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130860699","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: 8
A novel multiuser detector combining the 1-opt local search algorithm and SIC detection 结合1-opt局部搜索算法和SIC检测的新型多用户检测器
2009 International Conference on Advanced Technologies for Communications Pub Date : 2009-12-08 DOI: 10.1109/ATC.2009.5349488
A. Bentrcia, H. Elmorra, A. Zerguine, A. Sheikh
{"title":"A novel multiuser detector combining the 1-opt local search algorithm and SIC detection","authors":"A. Bentrcia, H. Elmorra, A. Zerguine, A. Sheikh","doi":"10.1109/ATC.2009.5349488","DOIUrl":"https://doi.org/10.1109/ATC.2009.5349488","url":null,"abstract":"In this paper, a new low-complexity hybrid multiuser detection scheme is proposed. The structure cascades a linear successive interference cancellation detector and a 1-opt local search algorithm. The proposed multiuser detector is compared to other multiuser detectors in terms of BER and complexity. Simulation results illustrate the superiority of the proposed scheme compared to actual ones existing in literature.","PeriodicalId":311235,"journal":{"name":"2009 International Conference on Advanced Technologies for Communications","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115392826","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
TS-LocalRank: A topic similarity local ranking algorithm for re-ranking web search results TS-LocalRank:一个主题相似度本地排序算法，用于重新排序web搜索结果
2009 International Conference on Advanced Technologies for Communications Pub Date : 2009-12-08 DOI: 10.1109/ATC.2009.5349536
Dung B. Le, S. Prasad
{"title":"TS-LocalRank: A topic similarity local ranking algorithm for re-ranking web search results","authors":"Dung B. Le, S. Prasad","doi":"10.1109/ATC.2009.5349536","DOIUrl":"https://doi.org/10.1109/ATC.2009.5349536","url":null,"abstract":"This paper proposes a variant of the PageRank algorithm to apply for re-ranking web search results. The algorithm (named TS-LocalRank) obtains top N pages from search results of a major search engine, assigns a local rank to each page based on the topic similarity between the web pages, re-orders the web pages, and presents the results to users. The objectives of this algorithm are (i) to assign a high local rank to the web pages which are most relevant to user query, and (ii) to minimize the Mean Absolute Deviation of the similarity between web pages in top search results.","PeriodicalId":311235,"journal":{"name":"2009 International Conference on Advanced Technologies for Communications","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116090735","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
Low-complexity scheduling algorithms for successive zero-forcing dirty paper coded systems 连续零强制脏纸编码系统的低复杂度调度算法
2009 International Conference on Advanced Technologies for Communications Pub Date : 2009-12-08 DOI: 10.1109/ATC.2009.5349463
Le-Nam Tran, E. Hong
{"title":"Low-complexity scheduling algorithms for successive zero-forcing dirty paper coded systems","authors":"Le-Nam Tran, E. Hong","doi":"10.1109/ATC.2009.5349463","DOIUrl":"https://doi.org/10.1109/ATC.2009.5349463","url":null,"abstract":"Dirty paper coding scheme (DPC) is known to be a capacity achieving transmission technique in downlink multiuser MIMO channels. As a suboptimal solution to DPC, a precoding technique called successive zero-forcing dirty paper coding (SZF-DPC) has been proposed recently. The condition for the existence of the precoding matrices in SZF-DPC restricts the capability of supporting multiple users simultaneously. Thus, a user scheduling algorithm is needed to achieve multiuser diversity in SZF-DPC as the number of users grows. In this paper, we propose three low-complexity suboptimal scheduling algorithms to exploit the multi-user diversity gain for SZF-DPC. The first algorithm greedily maximizes the true sum capacity. The second algorithm is based on eigenvalues that are closely related to the true capacity. The third algorithm relies on the diagonal elements of the effective channel matrix since we realize a strong relationship between the eigenvalues and diagonal entries of a Hermitian matrix. Simulation results of several cases show that the proposed scheduling algorithms can obtain a significant fraction of sum capacity of the optimal solution.","PeriodicalId":311235,"journal":{"name":"2009 International Conference on Advanced Technologies for Communications","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121443429","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
New approaches to design asynchronous circuits on FPGAs fpga上异步电路设计的新方法
2009 International Conference on Advanced Technologies for Communications Pub Date : 2009-12-08 DOI: 10.1109/ATC.2009.5349341
C. Pham-Quoc, Anh-Vu Dinh-Duc
{"title":"New approaches to design asynchronous circuits on FPGAs","authors":"C. Pham-Quoc, Anh-Vu Dinh-Duc","doi":"10.1109/ATC.2009.5349341","DOIUrl":"https://doi.org/10.1109/ATC.2009.5349341","url":null,"abstract":"FPGAs device is a dominant implementation medium for digital circuits. Unfortunately, they do not support asynchronous circuits because of the lack of asynchronous circuit elements such as Muller gates, etc. In this paper, new efficient approaches are proposed to prototype asynchronous or mixed synchronous/ asynchronous circuits on Look-Up Table-based (LUT) FPGA rapidly. The developed techniques are based on building of elements which play an important role in asynchronous circuits. The hazard-free elements are predefined in libraries in HDL and EDIF format. Timing and/or area constraints for place&route tool are automatically generated to map the asynchronous elements on suitable FPGA's logic blocks. Several FPGA devices such as Altera, Xilinx and Actel could be used as target for the implementation. For the purpose of demonstration, some asynchronous circuits are implemented with Xilinx Spartan 3 FPGA family.","PeriodicalId":311235,"journal":{"name":"2009 International Conference on Advanced Technologies for Communications","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123995179","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: 10
Beat noise cancellation in 2-D OCDMA systems using Optical Hard-limiter Array 光学硬限幅器阵列在二维OCDMA系统中的降噪研究
2009 International Conference on Advanced Technologies for Communications Pub Date : 2009-12-08 DOI: 10.1109/ATC.2009.5349255
N. Dang, A. Pham
{"title":"Beat noise cancellation in 2-D OCDMA systems using Optical Hard-limiter Array","authors":"N. Dang, A. Pham","doi":"10.1109/ATC.2009.5349255","DOIUrl":"https://doi.org/10.1109/ATC.2009.5349255","url":null,"abstract":"We comprehensively investigate beat noise cancellation in 2-D OCDMA systems using OHL array considering the real shape of optical pulse. The receiver's noises and multiple access interference (MAI) as well as the impact of pulse propagation are all taken into account. The numerical results show that, when OHL array is employed, the performance of 2-D OCDMA systems is much improved compared with the other cases of without OHL array. In addition, the 2-D OCDMA systems using OHL array can meet the requirements of the optical access networks in both number of users and transmission length. For example, with the average transmitted power per chip is −12 dBm, the system can support 30 users at bit rate 1 Gbit/s and maximum transmission length of 33 km. Other necessary parameters for practical system design also can be found in this paper including required transmitted power and optimum threshold.","PeriodicalId":311235,"journal":{"name":"2009 International Conference on Advanced Technologies for Communications","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132294589","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
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