2012 19th International Conference on Telecommunications (ICT)最新文献_第2页

Robust distributed two-way relay beamforming in cognitive radio networks 认知无线电网络中鲁棒分布式双向中继波束形成

2012 19th International Conference on Telecommunications (ICT) Pub Date : 2012-04-23 DOI: 10.1109/ICTEL.2012.6221248

P. Ubaidulla, S. Aïssa

{"title":"Robust distributed two-way relay beamforming in cognitive radio networks","authors":"P. Ubaidulla, S. Aïssa","doi":"10.1109/ICTEL.2012.6221248","DOIUrl":"https://doi.org/10.1109/ICTEL.2012.6221248","url":null,"abstract":"In this paper, we present distributed beamformer designs for a cognitive radio network (CRN) consisting of a pair of cognitive (or secondary) transceiver nodes communicating with each other through a set of secondary non-regenerative two-way relays. The secondary network shares the spectrum with a licensed primary user (PU), and operates under a constraint on the maximum interference to the PU, in addition to its own resource and quality of service (QoS) constraints. We propose beamformer designs assuming that the available channel state information (CSI) is imperfect, which reflects realistic scenarios. The performance of proposed designs is robust to the CSI errors. Such robustness is critical in CRNs given the difficulty in acquiring perfect CSI due to loose cooperation between the PUs and the secondary users (SUs), and the need for strict enforcement of PU interference limit. We consider a mean-square error (MSE)-constrained beamformer that minimizes the total relay transmit power and an MSE-balancing beamformer with a constraint on the total relay transmit power. We show that the proposed designs can be reformulated as convex optimization problems that can be solved efficiently. Through numerical simulations, we illustrate the improved performance of the proposed robust designs compared to non-robust designs.","PeriodicalId":413534,"journal":{"name":"2012 19th International Conference on Telecommunications (ICT)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124429347","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

The Bit Interleaved Coded Modulation module for DVB-NGH: Enhanced features for mobile reception 用于DVB-NGH的位交织编码调制模块:增强了移动接收的功能

2012 19th International Conference on Telecommunications (ICT) Pub Date : 2012-04-23 DOI: 10.1109/ICTEL.2012.6221327

C. Douillard, C. A. Nour

引用次数: 4

Optimized conditional privacy preservation in VANETs 优化了VANETs中的条件隐私保护

2012 19th International Conference on Telecommunications (ICT) Pub Date : 2012-04-23 DOI: 10.1109/ICTEL.2012.6221234

Mostafa Dikmak, Zahraa Sabra, A. Kayssi, A. Chehab

引用次数: 6

Secondary link adaptation in cognitive radio networks: End-to-end performance with cross-layer design 认知无线网络中的次级链路自适应:跨层设计的端到端性能

2012 19th International Conference on Telecommunications (ICT) Pub Date : 2012-04-23 DOI: 10.1109/ICTEL.2012.6221251

Hao Ma, Yuli Yang, S. Aïssa

{"title":"Secondary link adaptation in cognitive radio networks: End-to-end performance with cross-layer design","authors":"Hao Ma, Yuli Yang, S. Aïssa","doi":"10.1109/ICTEL.2012.6221251","DOIUrl":"https://doi.org/10.1109/ICTEL.2012.6221251","url":null,"abstract":"Under spectrum-sharing constraints, we consider the secondary link exploiting cross-layer combining of adaptive modulation and coding (AMC) at the physical layer with truncated automatic repeat request (T-ARQ) at the data link layer in cognitive radio networks. Both, basic AMC and aggressive AMC, are adopted to optimize the overall average spectral efficiency, subject to the interference constraints imposed by the primary user of the shared spectrum band and a target packet loss rate. We achieve the optimal boundary points in closed form to choose the AMC transmission modes by taking into account the channel state information from the secondary transmitter to both the primary receiver and the secondary receiver. Moreover, numerical results substantiate that, without any cost in the transmitter/receiver design nor the end-to-end delay, the scheme with aggressive AMC outperforms that with conventional AMC. The main reason is that, with aggressive AMC, different transmission modes utilized in the initial packet transmission and the following retransmissions match the time-varying channel conditions better than the basic pattern.","PeriodicalId":413534,"journal":{"name":"2012 19th International Conference on Telecommunications (ICT)","volume":"135 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115664822","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

The capacity of average power constrained additive non-Gaussian noise channels 平均功率约束加性非高斯噪声信道的容量

2012 19th International Conference on Telecommunications (ICT) Pub Date : 2012-04-23 DOI: 10.1109/ICTEL.2012.6221320

J. Fahs, Nizar Ajeeb, I. Abou-Faycal

引用次数: 11

Modeling electrocardiogram using Yule-Walker equations and kernel machines 用Yule-Walker方程和核机建模心电图

2012 19th International Conference on Telecommunications (ICT) Pub Date : 2012-04-23 DOI: 10.1109/ICTEL.2012.6221217

Maya Kallas, C. Francis, P. Honeine, H. Amoud, C. Richard

引用次数: 7

A privacy-preserving cache management system for MANETs 面向无线网络的保密性缓存管理系统

2012 19th International Conference on Telecommunications (ICT) Pub Date : 2012-04-23 DOI: 10.1109/ICTEL.2012.6221309

Kassem Fawaz, Noor Abbani, H. Artail

引用次数: 7

An operating system for a Reconfigurable Active SSD processing node Reconfigurable Active SSD处理节点操作系统

2012 19th International Conference on Telecommunications (ICT) Pub Date : 2012-04-23 DOI: 10.1109/ICTEL.2012.6221296

Ali Ali, Mohamad Jomaa, Bashar Romanous, Mageda Sharafeddine, M. Saghir, Haitham Akkary, H. Artail, M. Awad, Hazem M. Hajj

引用次数: 7

Non-binary LDPC Coded Orthogonal Modulation with Non-coherent Detection 非二进制 LDPC 编码正交调制与非相干检测

2012 19th International Conference on Telecommunications (ICT) Pub Date : 2012-04-23 DOI: 10.1109/ICTEL.2012.6221216

Haiyang Hu, Yukui Pei, Jiaqi Zhang, N. Ge

引用次数: 2

A surrounding-adaptive QoE adjustment approach for optimization of capacity and quality of air interface 一种空中接口容量和质量优化的环境自适应QoE调整方法

2012 19th International Conference on Telecommunications (ICT) Pub Date : 2012-04-23 DOI: 10.1109/ICTEL.2012.6221310

Bingjun Han, Xin Zhang, Yifei Qi, Yuehong Gao, Yitong Liu, Dacheng Yang

{"title":"A surrounding-adaptive QoE adjustment approach for optimization of capacity and quality of air interface","authors":"Bingjun Han, Xin Zhang, Yifei Qi, Yuehong Gao, Yitong Liu, Dacheng Yang","doi":"10.1109/ICTEL.2012.6221310","DOIUrl":"https://doi.org/10.1109/ICTEL.2012.6221310","url":null,"abstract":"Recently, the evaluation on quality of the air interface in a wireless network has shifted from emphasis on QoS (quality of service) only to incorporation of QoE (quality of experience). However, it seems that QoE metrics have not been related to the surroundings of the served users so far, which may have a great influence on users' expected QoE. For instance, with a high level of QoS, a user's expectation of QoE could still be terrible because of the serious interference from the surroundings such as noise, ambient light or shaking of terminals due to mobility. From another perspective, it means that in such a case a high level of QoS may be helpless to enhance users' QoE and the requirement could be relaxed accordingly. In this paper, an approach called surrounding-adaptive QoE adjustment (SAQA) is proposed to optimize the capacity and the quality of air interface with voice service as an example. The basic idea of the approach is that user equipment (UE) detects the surroundings interference which may impact users' QoE and then adjusts QoS according to the detected results: a lower level of QoS is chosen in a bad environment to enhance the capacity, while a higher level of QoS is selected to guarantee the users' QoE in a better circumstance. Simulation results show that this method can remarkably enhance the voice capacity of the communication systems as well as guarantee users' QoE.","PeriodicalId":413534,"journal":{"name":"2012 19th International Conference on Telecommunications (ICT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129629221","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