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2009 International Conference on Advanced Technologies for Communications最新文献

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Joint optimization of power allocation and cooperation in wireless OFDM networks 无线OFDM网络中功率分配与协同的联合优化
2009 International Conference on Advanced Technologies for Communications Pub Date : 2009-12-08 DOI: 10.1109/ATC.2009.5349432
Phuong T. Tran, J. Lehnert
{"title":"Joint optimization of power allocation and cooperation in wireless OFDM networks","authors":"Phuong T. Tran, J. Lehnert","doi":"10.1109/ATC.2009.5349432","DOIUrl":"https://doi.org/10.1109/ATC.2009.5349432","url":null,"abstract":"In wireless communication networks more than one antenna can be used to enhance the quality of transmission with transmit diversity. However, wireless devices such as mobile phones cannot have more than one antenna because of limits on size and complexity. Recently, cooperative communications have been proposed to create virtual antenna systems for circumventing this problem. This technique achieves a diversity gain by using a combination of the relayed signal and the direct signal. Here, we use a dual optimization method for non-convex problems to jointly optimize the power allocation and the scheduling of wireless cooperative OFDM systems. We find the optimal solution, and confirm our analysis by numerical results.","PeriodicalId":311235,"journal":{"name":"2009 International Conference on Advanced Technologies for Communications","volume":"98 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":"132539758","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
A lattice-reduction aided detection by combining LLL algorithm and gram-schmidt procedure 结合LLL算法和gram-schmidt过程的格降辅助检测
2009 International Conference on Advanced Technologies for Communications Pub Date : 2009-12-08 DOI: 10.1109/ATC.2009.5349556
T. Fujino, Shinjiro Wakazono, Yusuke Sasaki, X. Tran
{"title":"A lattice-reduction aided detection by combining LLL algorithm and gram-schmidt procedure","authors":"T. Fujino, Shinjiro Wakazono, Yusuke Sasaki, X. Tran","doi":"10.1109/ATC.2009.5349556","DOIUrl":"https://doi.org/10.1109/ATC.2009.5349556","url":null,"abstract":"This paper proposes an improved lattice-reduction aided (LRA) MMSE detection by combining the LLL algorithm and the Gram-Schmidt (GS) procedure. The proposed detection reduces the column vectors of the MIMO channel matrix using the LLL algorithm and the GS procedure to create mutually purely orthogonal column vectors of the reduced channel matrix. Then the decision boundary becomes the same as that for the ML detection. Compared to the conventional LRA MMSE detector, the proposed detector achieves much closer BER performances to those for the ML detector in both the 4×4 MIMO and the 8×8 MIMO systems.","PeriodicalId":311235,"journal":{"name":"2009 International Conference on Advanced Technologies for Communications","volume":"37 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":"125441048","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
Capacity and cutoff rate of binary tree network composed of BSC 由BSC构成的二叉树网络的容量和截止率
2009 International Conference on Advanced Technologies for Communications Pub Date : 2009-12-08 DOI: 10.1109/ATC.2009.5349394
S. Tani, I. Oka, S. Ata
{"title":"Capacity and cutoff rate of binary tree network composed of BSC","authors":"S. Tani, I. Oka, S. Ata","doi":"10.1109/ATC.2009.5349394","DOIUrl":"https://doi.org/10.1109/ATC.2009.5349394","url":null,"abstract":"Wireless sensor networks have attracted much attention recently with ubiquitous or ad hoc applications. Wireless sensor nodes may be deployed on some fields and organize themselves in a large scale ad hoc network. A path diversity is an effective technique to get highly reliable communications in the sensor networks. In this paper, the capacity and cutoff rate of binary tree network composed of BSC is derived to examine the path diversity effect. Numerical results show that the capacity and cutoff rate keep constants, even if the network size becomes large.","PeriodicalId":311235,"journal":{"name":"2009 International Conference on Advanced Technologies for Communications","volume":"18 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":"123389724","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
SMAV: A solution for multiple-attribute search on DHT-based P2P network 基于dhp的P2P网络中多属性搜索的解决方案
2009 International Conference on Advanced Technologies for Communications Pub Date : 2009-12-08 DOI: 10.1109/ATC.2009.5349557
H. Nguyen, T. Nguyen, Thi Hue Pham
{"title":"SMAV: A solution for multiple-attribute search on DHT-based P2P network","authors":"H. Nguyen, T. Nguyen, Thi Hue Pham","doi":"10.1109/ATC.2009.5349557","DOIUrl":"https://doi.org/10.1109/ATC.2009.5349557","url":null,"abstract":"DHT-based P2P networks such as Chord, CAN, Pastry, etc can achieve exact query with characteristic of scalability, efficiency and fault-tolerate. However, in the case of complex queries such as range query or multiple-attribute query, pure DHT is not efficient since a lot of query messages must be sent. In this paper we focus our intentions on multiple-attribute query on DHT-based P2P network systems. Conventional researches meet a problem arising from the load unbalance among nodes due to the appearance of common attribute/value pairs (AV pairs) in content names (i.e. AV pairs those appear in a lot of content names). We propose a hierarchical key generation approach for storing and querying multiple-attribute contents. The main idea of our proposed system is to limit the number of information contents distributed by one key to a node by the use of sub-keys created from multiple common AV pairs. Sub-keys, by which the total number of information contents in the system are already distributed is not over NMAX, will be used as distribution keys to distribute information contents. Furthermore, our system keeps the mapping between sub-keys created from two common AV pairs and distribution keys created from two more common AV pairs to reduce query cost. Our system can achieve both efficiency and a good degree of load balancing even when the distribution of AV pairs in content names is skewed. Our simulation result shows the efficiency of our solution in respects of lookup time and the degree of load balancing.","PeriodicalId":311235,"journal":{"name":"2009 International Conference on Advanced Technologies for Communications","volume":"20 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":"125526493","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
Multiuser precoding and power allocation in downlink of cooperative CDMA networks 协同CDMA网络下行多用户预编码与功率分配
2009 International Conference on Advanced Technologies for Communications Pub Date : 2009-12-08 DOI: 10.1109/ATC.2009.5349437
Mohammad Abdizadeh, A.F.M. Jafarnia, H. J. Rad
{"title":"Multiuser precoding and power allocation in downlink of cooperative CDMA networks","authors":"Mohammad Abdizadeh, A.F.M. Jafarnia, H. J. Rad","doi":"10.1109/ATC.2009.5349437","DOIUrl":"https://doi.org/10.1109/ATC.2009.5349437","url":null,"abstract":"In this paper, we study the downlink of cooperative Direct-Sequence Code Division Multiple Access (DS-CDMA) systems, where a set of Mobile Terminals (MT) cooperate with the purpose of improving their downlink communications reliability with Base Station (BS). For combating Multiple-Access Interference (MAI) as well as transferring complexity and spatial processing from the mobile terminals to the transmitter of BS, multiuser transmitter precoding is considered. In addition to multiuser precoding based on Minimum Mean-Square Error (MMSE) criterion for mitigating MAI, the proper transmission power control strategy under a fixed total power constraint is proposed and analyzed. Compared with equal transmission power assigning, where BS and cooperative terminals transmit with the same power, the proposed power allocation scheme leads to a significant performance gain at the destination. Finally, simulation results demonstrate acceptable performance for the proposed multiuser precoding algorithms and power allocation schemes in synchronous DS-CDMA systems.","PeriodicalId":311235,"journal":{"name":"2009 International Conference on Advanced Technologies for Communications","volume":"73 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":"127365984","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
Broadcast gossip based distributed hypothesis testing in wireless sensor networks 无线传感器网络中基于广播八卦的分布式假设检验
2009 International Conference on Advanced Technologies for Communications Pub Date : 2009-10-12 DOI: 10.1109/ATC.2009.5349327
The-Dung Pham, H. Ngo, Viet-Duc Le, Sungyoung Lee, Young-Koo Lee
{"title":"Broadcast gossip based distributed hypothesis testing in wireless sensor networks","authors":"The-Dung Pham, H. Ngo, Viet-Duc Le, Sungyoung Lee, Young-Koo Lee","doi":"10.1109/ATC.2009.5349327","DOIUrl":"https://doi.org/10.1109/ATC.2009.5349327","url":null,"abstract":"We consider the scenario that N sensors collaborate to observe a single event. The sensors are distributed and can only exchange messages through a network to reach a consensus about the observed event. In this paper, we propose a very robust and simple method using broadcast gossip algorithm to solve the distributed hypothesis testing problem. The simulation result shows that our method has good performance and is very energy efficient comparing to existing methods.","PeriodicalId":311235,"journal":{"name":"2009 International Conference on Advanced Technologies for Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130850980","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
2.4GHz WLAN D-pHEMT LNA 千兆赫无线频率
2009 International Conference on Advanced Technologies for Communications Pub Date : 2009-10-01 DOI: 10.1109/ATC.2009.5349601
Zhang Qian, Li Wenyuan, Wang Zhigong, Qian Cheng, Zhang Xichang
{"title":"2.4GHz WLAN D-pHEMT LNA","authors":"Zhang Qian, Li Wenyuan, Wang Zhigong, Qian Cheng, Zhang Xichang","doi":"10.1109/ATC.2009.5349601","DOIUrl":"https://doi.org/10.1109/ATC.2009.5349601","url":null,"abstract":"an integrated narrowband low noise amplifier in cascode topology has been developed for WLAN applications. Using WIN's 0.15µm pHEMT technology, the impedance matching, voltage gain, noise figure and 1dB compression point of the circuit are analyzed and optimized under specified power consumption. Results from the simulation under advanced design system(ADS) software and momentum show that the maximum forward gain of the circuit is 20dB, noise figure is 0.93dB, OP1dB is 10dBm at the center frequency of 2.4GHz, while comsuming 42mA current from a 3.3V power supply.","PeriodicalId":311235,"journal":{"name":"2009 International Conference on Advanced Technologies for Communications","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131920705","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
Session: Embedded systems & VLSI design 会议:嵌入式系统和VLSI设计
2009 International Conference on Advanced Technologies for Communications Pub Date : 1900-01-01 DOI: 10.1109/atc.2009.5349332
{"title":"Session: Embedded systems & VLSI design","authors":"","doi":"10.1109/atc.2009.5349332","DOIUrl":"https://doi.org/10.1109/atc.2009.5349332","url":null,"abstract":"","PeriodicalId":311235,"journal":{"name":"2009 International Conference on Advanced Technologies for Communications","volume":"281 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122945399","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
Session: Systems & circuits for communications 会议:通信系统和电路
2009 International Conference on Advanced Technologies for Communications Pub Date : 1900-01-01 DOI: 10.1109/atc.2009.5349578
{"title":"Session: Systems & circuits for communications","authors":"","doi":"10.1109/atc.2009.5349578","DOIUrl":"https://doi.org/10.1109/atc.2009.5349578","url":null,"abstract":"","PeriodicalId":311235,"journal":{"name":"2009 International Conference on Advanced Technologies for Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131291467","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
Session: Communication protocols 会话:通信协议
2009 International Conference on Advanced Technologies for Communications Pub Date : 1900-01-01 DOI: 10.1109/atc.2009.5349532
{"title":"Session: Communication protocols","authors":"","doi":"10.1109/atc.2009.5349532","DOIUrl":"https://doi.org/10.1109/atc.2009.5349532","url":null,"abstract":"","PeriodicalId":311235,"journal":{"name":"2009 International Conference on Advanced Technologies for Communications","volume":"164 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121061732","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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