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2009 International Conference on Wireless Communications & Signal Processing最新文献

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A modified channel model for non-isotropic scattering enviroments 非各向同性散射环境下的改进信道模型
2009 International Conference on Wireless Communications & Signal Processing Pub Date : 2009-12-31 DOI: 10.1109/WCSP.2009.5371442
Zhu Qiu-ming, Xu Dazhuan, Chen Xiaomin
{"title":"A modified channel model for non-isotropic scattering enviroments","authors":"Zhu Qiu-ming, Xu Dazhuan, Chen Xiaomin","doi":"10.1109/WCSP.2009.5371442","DOIUrl":"https://doi.org/10.1109/WCSP.2009.5371442","url":null,"abstract":"A modified sum-of-sinusoids (SoS) channel model for two-dimensional (2-D) non-isotropic scattering environments is presented, which be applied on any single-path channel based on equal probability areas of the angle of arrival (AoA) and can be generalized to multi-path channels. Its performance can be improved using principle of set partitioning. The auto-correlation function (ACF) of our model is close to the ACF of the reference model, and better than traditional models.","PeriodicalId":244652,"journal":{"name":"2009 International Conference on Wireless Communications & Signal Processing","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131424017","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
Two adaptive diagonalization method for Double STTD system 双STTD系统的两种自适应对角化方法
2009 International Conference on Wireless Communications & Signal Processing Pub Date : 2009-12-31 DOI: 10.1109/WCSP.2009.5371422
Tao Wu, Rongdao Yu
{"title":"Two adaptive diagonalization method for Double STTD system","authors":"Tao Wu, Rongdao Yu","doi":"10.1109/WCSP.2009.5371422","DOIUrl":"https://doi.org/10.1109/WCSP.2009.5371422","url":null,"abstract":"In this paper, we deliver the diagonalization methods for the single user and multi-user D-STTD (Double Space Time Transmission Diversity) system. A single user D-STTD system is that one transmitter sends four streams to one receiver and a multi-user D-STTD system is that one transmitter sends four streams to two receivers. In the two scenarios, we utilize the special structure of HHH of D-STTD system and split the precoding matrix W as W1W2 with known channel knowledge in the transmitter: at first, the anti-diagonal sub-matrix of HHH has been diagonalized by W1; in the second, the leaving element of symmetric structure matrix (HW1)HHW1 has been diagonalized by W2 through SVD or GSVD. Furthermore, the adaptive antenna shuffling has been introduced into multi-user D-STTD system to improve performance. Our methods in two systems all have significant performance gain which are proved by the simulation results: in the single user D-STTD system, our method has the same performance as SVD method and no special operation is needed in receiver; in the multi-user D-STTD system, our method has almost 2.0dB gain than no precoding method.","PeriodicalId":244652,"journal":{"name":"2009 International Conference on Wireless Communications & Signal Processing","volume":"277 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131538413","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
Improved relay selection and subcarrier pairing with fairness constraints for OFDM networks 基于公平性约束的OFDM网络中继选择和子载波配对改进
2009 International Conference on Wireless Communications & Signal Processing Pub Date : 2009-12-31 DOI: 10.1109/WCSP.2009.5371470
Chunxiao Cai, Wendong Yang, Yueming Cai
{"title":"Improved relay selection and subcarrier pairing with fairness constraints for OFDM networks","authors":"Chunxiao Cai, Wendong Yang, Yueming Cai","doi":"10.1109/WCSP.2009.5371470","DOIUrl":"https://doi.org/10.1109/WCSP.2009.5371470","url":null,"abstract":"We consider an Amplify-and-Forward relay selection for OFDM networks with fairness constraints where a source node communicates with a destination node with the help of one or more relays. The system model assumes all relays participate and considers the subcarrier pairing with fairness constraints on relays. Our subcarrier allocation algorithm is presented to maximize the system capacity based on complete channel state information. This approach is compared with the theoretical maximum, and it is found the complexity of this algorithm is much lower than that of Hungarian algorithm.","PeriodicalId":244652,"journal":{"name":"2009 International Conference on Wireless Communications & Signal Processing","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134034244","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
Cost design for cross-layer resource allocation in cognitive radio ad hoc networks 认知无线自组网中跨层资源分配的成本设计
2009 International Conference on Wireless Communications & Signal Processing Pub Date : 2009-12-31 DOI: 10.1109/WCSP.2009.5371405
Wu Chun-de, Pan Zhiwen, Y. Xiaohu, Wu Ping, Hu Honglin, Zhang Yong
{"title":"Cost design for cross-layer resource allocation in cognitive radio ad hoc networks","authors":"Wu Chun-de, Pan Zhiwen, Y. Xiaohu, Wu Ping, Hu Honglin, Zhang Yong","doi":"10.1109/WCSP.2009.5371405","DOIUrl":"https://doi.org/10.1109/WCSP.2009.5371405","url":null,"abstract":"In this paper, cost function for routing is studied. By introduction of improved cost function, an improved algorithm is proposed. Compared with the original algorithm, the improved algorithm is more stable and the feasible solution obtained is closer to the upper bound of optimal solution. The optimal solution lies between the upper bound and the feasible solution, so the feasible solution is even closer to the optimal solution. Therefore, algorithm with new cost function has better performance than the original algorithm.","PeriodicalId":244652,"journal":{"name":"2009 International Conference on Wireless Communications & Signal Processing","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125599265","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
Energy efficiency of collaborative communication with imperfect phase synchronization and Rayleigh fading in wireless sensor networks 不完全相位同步和瑞利衰落无线传感器网络协同通信的能量效率
2009 International Conference on Wireless Communications & Signal Processing Pub Date : 2009-12-31 DOI: 10.1109/WCSP.2009.5371624
Husnain Naqvi, S. Berber, Z. Salcic, Shudong Fang
{"title":"Energy efficiency of collaborative communication with imperfect phase synchronization and Rayleigh fading in wireless sensor networks","authors":"Husnain Naqvi, S. Berber, Z. Salcic, Shudong Fang","doi":"10.1109/WCSP.2009.5371624","DOIUrl":"https://doi.org/10.1109/WCSP.2009.5371624","url":null,"abstract":"In this paper it is presented that significant power gain can be accomplished using collaborative communication, despite of imperfect phase synchronization over the Rayleigh fading channel. This paper presents an energy consumption model for the considered collaborative communication system with imperfect phase synchronization and channel fading. With this model, it is easy to find that, as the number of collaborative sensor nodes increases, notable power can be saved from the data transmission at the expense of increased circuit power. Hence, an energy saving model is defined to study the trade-off between the data transmission power gain and required circuit power. The presented numerical results use parameters taking values from the off-the-shelf products. It is shown that significant energy can be saved using collaborative communication as compared to SISO (Single input single output) communication when the transmission distance is greater than the break-even distance.","PeriodicalId":244652,"journal":{"name":"2009 International Conference on Wireless Communications & Signal Processing","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125609486","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
Frequency estimation based on discrete Fourier transform and least squares 基于离散傅里叶变换和最小二乘的频率估计
2009 International Conference on Wireless Communications & Signal Processing Pub Date : 2009-12-31 DOI: 10.1109/WCSP.2009.5371661
Zhang Gang-bing, Liu Yu, Xu Jia-jia, Hu Guo-bing
{"title":"Frequency estimation based on discrete Fourier transform and least squares","authors":"Zhang Gang-bing, Liu Yu, Xu Jia-jia, Hu Guo-bing","doi":"10.1109/WCSP.2009.5371661","DOIUrl":"https://doi.org/10.1109/WCSP.2009.5371661","url":null,"abstract":"A frequency estimation algorithm of sinusoidal signal was presented. It consists of a coarse frequency estimation followed by fine frequency estimation. Discrete Fourier transform (DFT) determines the coarse frequency estimation and least squares estimator (LSE) makes it possible to get the optimal frequency difference estimation. Subsequently, we derive the relationship between the asymptotic error variance (AEV) and the Cramer-Rao bound (CRB). Simulation results show that the performance of the proposed algorithm approaches the CRB of the sinusoid when the signal-to-noise ratio (SNR) is higher than the SNR threshold.","PeriodicalId":244652,"journal":{"name":"2009 International Conference on Wireless Communications & Signal Processing","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132310955","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
A greedy algorithm for cognitive network resource allocation based on minimum remaining constraint space 基于最小剩余约束空间的认知网络资源分配贪心算法
2009 International Conference on Wireless Communications & Signal Processing Pub Date : 2009-12-31 DOI: 10.1109/WCSP.2009.5371627
Yuehuai Ma, Youyun Xu, Y. Sheng
{"title":"A greedy algorithm for cognitive network resource allocation based on minimum remaining constraint space","authors":"Yuehuai Ma, Youyun Xu, Y. Sheng","doi":"10.1109/WCSP.2009.5371627","DOIUrl":"https://doi.org/10.1109/WCSP.2009.5371627","url":null,"abstract":"The problem of resource allocation for multiuser OFDM based cognitive network is studied. A new greedy algorithm based on minimum remaining constraint space (MRCS) is proposed to allocate subcarrier, power and bit efficiently. Both active frequency bands occupied by primary users and spectrum holes can be used by cognitive users, as long as the interferences introduced by cognitive users to primary users below a certain threshold. Simulation results show that the proposed algorithm is fit for the practical environment and has better performance than other existing allocation algorithms.","PeriodicalId":244652,"journal":{"name":"2009 International Conference on Wireless Communications & Signal Processing","volume":"216 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114049690","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
Study on signal acquisition algorithm of laser communication at sea 海上激光通信信号采集算法研究
2009 International Conference on Wireless Communications & Signal Processing Pub Date : 2009-12-31 DOI: 10.1109/WCSP.2009.5371431
Li Da-she, Liu Shu-e
{"title":"Study on signal acquisition algorithm of laser communication at sea","authors":"Li Da-she, Liu Shu-e","doi":"10.1109/WCSP.2009.5371431","DOIUrl":"https://doi.org/10.1109/WCSP.2009.5371431","url":null,"abstract":"According to the characteristics of laser communication at sea, we propose a sort of step scanning acquisition method for maritime communication. Comparing with traditional continuous scanning method, it can get velocity, high sensitivity and large acquisition range. The proposed acquisition method is based on Yang's noisy model. Through quadrant devices, we processed the acquisition signal and set up QD model. From the simulation result of RBF neural network, we find only few errors exist.","PeriodicalId":244652,"journal":{"name":"2009 International Conference on Wireless Communications & Signal Processing","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127889732","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
A reputation management framework for Hybrid Wireless Relay Networks 混合无线中继网络的声誉管理框架
2009 International Conference on Wireless Communications & Signal Processing Pub Date : 2009-12-31 DOI: 10.1109/WCSP.2009.5371503
Qing Ding, Ming Jiang, Xi Li, Xuehai Zhou
{"title":"A reputation management framework for Hybrid Wireless Relay Networks","authors":"Qing Ding, Ming Jiang, Xi Li, Xuehai Zhou","doi":"10.1109/WCSP.2009.5371503","DOIUrl":"https://doi.org/10.1109/WCSP.2009.5371503","url":null,"abstract":"The WWAN/WLAN two-hop-relay system integrates two types of wireless technologies to improve wireless access throughput and coverage. However, it is unreasonable to assume that all nodes are selfless and willing to relay for other users without an incentive. In this paper, a reputation management framework for Hybrid Wireless Relay Networks is presented. Based on this framework, we show how to collect and query reputation in an accurate, secure and efficient manner. The new reputation function is designed. The simulation results show that our model performs well in terms of convergence overload, communication overload, and performance.","PeriodicalId":244652,"journal":{"name":"2009 International Conference on Wireless Communications & Signal Processing","volume":"244 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121231382","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
Convergence of distributed power control with full-duplex amplify-and-forward relays 分布式功率控制与全双工放大转发继电器的融合
2009 International Conference on Wireless Communications & Signal Processing Pub Date : 2009-12-31 DOI: 10.1109/WCSP.2009.5371605
Young-Keum Song, Dongwoo Kim
{"title":"Convergence of distributed power control with full-duplex amplify-and-forward relays","authors":"Young-Keum Song, Dongwoo Kim","doi":"10.1109/WCSP.2009.5371605","DOIUrl":"https://doi.org/10.1109/WCSP.2009.5371605","url":null,"abstract":"In this paper, we introduce a power control algorithm for cooperative cellular networks consisting of multiple sources, multiple full-duplex amplify-and-forward relays, and a destination. The objective of this algorithm is to allocate the available power of each source so that it can achieve the required transmission quality. The full-duplex relays receive the signal amplified by themselves and re-amplify it sequentially. We derive the SINR and interference function, and then a simplified analysis of convergence is given by using a standard techniques. We evaluate the power controlled system in terms of the outage probability as well as the average power consumption, and compare it with the system without a relay and with half-duplex relays, respectively. The simulation results illustrates potential advantages of the power controlled system with full-duplex relays, the performance of which is limited by an isolation factor.","PeriodicalId":244652,"journal":{"name":"2009 International Conference on Wireless Communications & Signal Processing","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121244904","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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