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Multiband printed monopole antenna with square-nested fractal 方形嵌套分形多波段印刷单极天线
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/ChinaCom.2011.6158289
Li-na Wang, Shu Lin, Run-nan Cai, Guan-long Huang, Wen-bin Zhang
{"title":"Multiband printed monopole antenna with square-nested fractal","authors":"Li-na Wang, Shu Lin, Run-nan Cai, Guan-long Huang, Wen-bin Zhang","doi":"10.1109/ChinaCom.2011.6158289","DOIUrl":"https://doi.org/10.1109/ChinaCom.2011.6158289","url":null,"abstract":"A kind of novel multiband monopole antenna with square-nested fractal is proposed and designed, which is nested with a series of similar square elements. The antennas can synchronously operate in multiple frequencies, covering the four required frequencies, 2.4GHz/3.5GHz/5.2GHz/5.8GHz, for WLAN/WiMAX application. The antenna surface currents are simulated by CST Microwave Studio®, a 3-dimension full-wave electromagnetic simulator, and the multiband operating mechanism has been explained from analysis of the simulated results. Then model of the proposed monopole antenna fed by coplanar waveguide has been obtained. Finally, prototype of the antenna has been manufactured and measured in anechoic chamber. The results well match the simulated, which verify the feasibility of design idea. Moreover, these antennas are miniature and the design idea can be easily applied into other types of nested structure, the features of which make the proposed antenna has promising application in multiband fields.","PeriodicalId":339961,"journal":{"name":"2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132615509","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: 12
Performance analysis of cooperative transmission in multiple-access relay networks over Nakagami fading channels Nakagami衰落信道下多址中继网络协同传输性能分析
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/ChinaCom.2011.6158333
Chunlei Han, J. Ge, Jing Li, Gao Yang
{"title":"Performance analysis of cooperative transmission in multiple-access relay networks over Nakagami fading channels","authors":"Chunlei Han, J. Ge, Jing Li, Gao Yang","doi":"10.1109/ChinaCom.2011.6158333","DOIUrl":"https://doi.org/10.1109/ChinaCom.2011.6158333","url":null,"abstract":"In this paper, we consider a cooperative transmission scheme in multiple-access relay networks. By analyzing the error decoding event (EDE) probability, we derive a bit error rate (BER) approximation of the scheme over Nakagami fading channels. Simulation results verify the validity of the theoretical analysis, and further show that the considered scheme outperforms the conventional coded cooperation (CC) scheme, especially at high signal-to-noise ratio (SNR).","PeriodicalId":339961,"journal":{"name":"2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114450913","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
Three-state semi-Markov channel model for HAP-high speed train communication link 高速列车通信链路的三态半马尔可夫信道模型
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/ChinaCom.2011.6158163
Ming Li, Mingchuan Yang, Gu Lv, Qing Guo
{"title":"Three-state semi-Markov channel model for HAP-high speed train communication link","authors":"Ming Li, Mingchuan Yang, Gu Lv, Qing Guo","doi":"10.1109/ChinaCom.2011.6158163","DOIUrl":"https://doi.org/10.1109/ChinaCom.2011.6158163","url":null,"abstract":"Given that single-state model can only describe single channel environment, while multiple-state model brings more parameters and more complicated simulation work, a three-state semi-Markov channel model including LOS (light of sight) state, shadowed state and blocked state was proposed to solve this problem. A simulation model was established corresponding to the theoretical model, based on the analysis of simulation data, it matched well with the theoretical model. It is thus concluded that the proposed model is effective in analyzing the propagation characteristics, optimizing the modulation and coding schemes and simulating the performance of HAP (high altitude platform) communication systems. Some research aimed at providing broadband services for the passengers on board of a train via a HAP system has been resolved, such as CAPANINA project in Europe. However, there is no correlative research about HAP based the environment of high-speed train in China. Therefore, date elevation model (DEM) of the railway from Beijing to Tianjin was put into the simulation model, and correlative parameter aimed at the channel environment of China was obtained.","PeriodicalId":339961,"journal":{"name":"2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115787691","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
Upper capacity bound and power allocation in polarized distributed MIMO system 极化分布式MIMO系统的容量上限与功率分配
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/ChinaCom.2011.6158148
Wei Lu, Desheng Wang, Yingzhuang Liu
{"title":"Upper capacity bound and power allocation in polarized distributed MIMO system","authors":"Wei Lu, Desheng Wang, Yingzhuang Liu","doi":"10.1109/ChinaCom.2011.6158148","DOIUrl":"https://doi.org/10.1109/ChinaCom.2011.6158148","url":null,"abstract":"By deriving the upper capacity bound of the polarized distributed MIMO system on Rician channel, the suboptimal power allocation scheme is presented by applying Lagrangian optimization. The suboptimal power allocation is based on the path loss fading information, and it needs less feedback information than other power allocation schemes which are based on channel mean or covariance matrix. The suboptimal power allocation scheme is applicable for arbitrary antenna number at both the transmitter and receiver sides. The proposed power allocation solution has a closed-form expression and has a water-filling interpretation. Simulation results reveal the proposed power allocation scheme performs almost the same as the optimal solution with little difference.","PeriodicalId":339961,"journal":{"name":"2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121389178","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
An iterative multiple primary users localization algorithm based on clustering 一种基于聚类的迭代多主用户定位算法
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/CHINACOM.2011.6158156
Xing Zhiqiang, Li Wei, Han Qiang
{"title":"An iterative multiple primary users localization algorithm based on clustering","authors":"Xing Zhiqiang, Li Wei, Han Qiang","doi":"10.1109/CHINACOM.2011.6158156","DOIUrl":"https://doi.org/10.1109/CHINACOM.2011.6158156","url":null,"abstract":"Multiple co-channel primary users (PU) existing simultaneously is very common in cognitive radio environments. With the knowledge of the location information of PUs, the cognitive radio can use spectrum-access opportunities more effectively and provides more value-added services. A novel multiple PUs localization algorithm was proposed, which seeks non-cooperative PUs' position by executing k-mean clustering and iterative operations. Simulation results show that the proposed method achieves better performance than traditional expectation-maximization(EM) algorithm.","PeriodicalId":339961,"journal":{"name":"2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125766834","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
Generalized sampling theorem for bandpass signals associated with fractional Fourier transform 分数阶傅里叶变换带通信号的广义采样定理
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/ChinaCom.2011.6158237
Jun Shi, X. Sha, Qinyu Zhang, Naitong Zhang
{"title":"Generalized sampling theorem for bandpass signals associated with fractional Fourier transform","authors":"Jun Shi, X. Sha, Qinyu Zhang, Naitong Zhang","doi":"10.1109/ChinaCom.2011.6158237","DOIUrl":"https://doi.org/10.1109/ChinaCom.2011.6158237","url":null,"abstract":"The fractional Fourier transform (FRFT) which is a generalization of the Fourier transform (FT) has been shown to be a powerful analyzing tool in signal processing. Many properties of the FT including the generalized sampling theorem have been extended to the FRFT. However, the existing extensions of the classical generalized sampling theorem for the FRFT are derived from the lowpass signal viewpoint, and the implementation of those extensions is inefficient for the effect of spectral leakage. In this paper, we propose a new generalized sampling theorem associated with the FRFT from the fractional bandpass signal viewpoint. The proposed theorem which is constructed by the ordinary convolution in the time domain can overcome the effect of spectral leakage and is easy to implement in practical applications.","PeriodicalId":339961,"journal":{"name":"2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125874717","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
Layered Broadcast/Multicast mechanism for Spectral-efficient 4G wireless networks 频谱高效4G无线网络的分层广播/组播机制
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/ChinaCom.2011.6158192
Jingqing Mei, Hong Ji, Yi Li
{"title":"Layered Broadcast/Multicast mechanism for Spectral-efficient 4G wireless networks","authors":"Jingqing Mei, Hong Ji, Yi Li","doi":"10.1109/ChinaCom.2011.6158192","DOIUrl":"https://doi.org/10.1109/ChinaCom.2011.6158192","url":null,"abstract":"By adopting hierarchical modulation, layered broadcast/multicast mechanism is a promising method to achieve spectral efficient transmission for users with diverse fading channels in 4G wireless networks, however, there is a great challenge to determine the optimal modulation parameters in applications due to the varying wireless environment and the technique characteristics. In this work, a Spectral-efficient Layered Broadcast/Multicast (SLBM) mechanism for 4G Wireless networks is proposed to solve this problem in a Rayleigh fading channel. With consideration of both the efficiency and reliability, a spectral efficiency evaluation function is formulated, and to facilitate the decision process of optimal modulation parameters, a modulation solution set for SLBM with multiple layers is defined. Based on the modulation solution set, a layered modulation solution selection algorithm is illustrated to determine the optimal modulation parameters effectively. Numeric analysis is conducted to demonstrate the proposed mechanism with comparison to conventional scheme, and the results demonstrate that SLBM mechanism could yield higher energy efficiency under different bit error rate (BER) targets, while the impact of number of layers is discussed.","PeriodicalId":339961,"journal":{"name":"2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130008512","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
ONU patching for efficient VoD service over Integrated Fiber-Wireless (FiWi) access networks ONU补丁在综合光纤无线(FiWi)接入网上提供高效的视频点播服务
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/ChinaCom.2011.6158303
Yun Xu, Yan Li
{"title":"ONU patching for efficient VoD service over Integrated Fiber-Wireless (FiWi) access networks","authors":"Yun Xu, Yan Li","doi":"10.1109/ChinaCom.2011.6158303","DOIUrl":"https://doi.org/10.1109/ChinaCom.2011.6158303","url":null,"abstract":"Integrated Fiber-Wireless (FiWi) access networks which employ optical fiber subnetwork as back end give new vitality to high bandwidth provisional services. Video-on-Demand (VoD), as one of bandwidth-exhausted services, it is expected to be efficiently supported over FiWi access networks. However, considering that the ever-increasing concern on energy-saving FiWi access networks and the self-configured network connectivity of wireless subnetwork, it is challenged to guarantee a better level of VoD service over FiWi access networks. In this study, we will focus on addressing how to minimize worst-case playback delay (WPD) which can avoid unpleasant experience of wireless customers. Specifically, we first design a PON architecture supporting direct inter-ONU broadcasting. Then, under the constraint of the limited storage capacity of ONUs, an ONU patching scheme is proposed to achieve minimum WPD over FiWi access networks with the designed PON subnetwork. The simulations validate the efficiency of our work.","PeriodicalId":339961,"journal":{"name":"2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129583351","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 new HF radio prototype based on dynamic spectrum anti-jamming concept 基于动态频谱抗干扰概念的新型高频无线电样机
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/ChinaCom.2011.6158294
Yichao Zhu, Ping Wang, Jianxun Lu
{"title":"A new HF radio prototype based on dynamic spectrum anti-jamming concept","authors":"Yichao Zhu, Ping Wang, Jianxun Lu","doi":"10.1109/ChinaCom.2011.6158294","DOIUrl":"https://doi.org/10.1109/ChinaCom.2011.6158294","url":null,"abstract":"A new high-frequency (HF) radio prototype based on dynamic spectrum anti-jamming (DSAJ) technology was recently developed. DSAJ applies the opportunistic spectrum access concept of cognitive radio to the anti-jamming communications. Making use of the properties that there are many “spectrum holes” within HF band where no jamming exists or the power of jamming is below a particular threshold, and durations of the spectrum holes in each day are correlated, DSAJ is able to perform real-time transmit frequency selection and system parameter adjustment by detecting spectrum holes in its system bandwidth and tracking the variations of jamming in the spectrum holes. This prototype achieves many desirable features such as anti-interception, anti-jamming, optimum transmit frequency determination and uninterrupted communication, all of which have been validated via lab and field tests.","PeriodicalId":339961,"journal":{"name":"2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128554099","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
Capacity analysis of downlink MRT-SC in distributed antenna system 分布式天线系统下行MRT-SC容量分析
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/ChinaCom.2011.6158173
Zhun Ye, Linan Sun, Qiyue Yu, Zhongzhao Zhang
{"title":"Capacity analysis of downlink MRT-SC in distributed antenna system","authors":"Zhun Ye, Linan Sun, Qiyue Yu, Zhongzhao Zhang","doi":"10.1109/ChinaCom.2011.6158173","DOIUrl":"https://doi.org/10.1109/ChinaCom.2011.6158173","url":null,"abstract":"This paper investigates the downlink capacity of maximal ratio transmission-selection combining (MRT-SC) in the distributed antenna system (DAS). Composite fading channels are assumed, which include path loss, lognormal shadowing and multi-path Rayleigh fading. Analytical approximation of the capacity's cumulative distribution function (CDF) is derived by means of a moment generation function (MGF) based approach. The influence of transmit/receive antenna number on the capacity distribution and the impact of receiver location on the 10% outage capacity are investigated. Simulation results agree with the analytical approximations well. Furthermore, it shows that the 10% outage capacity of MRT-SC presents an approximately uniform distribution over most of the interested area, and its value is almost the same with maximal ratio transmission-maximal ratio combining (MRT-MRC).","PeriodicalId":339961,"journal":{"name":"2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126698287","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
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