无线互联科技最新文献_第4页

Demonstration of RIWCoS platform for future heterogeneous networks 面向未来异构网络的RIWCoS平台演示

无线互联科技 Pub Date : 2011-07-05 DOI: 10.1109/WIRELESSVITAE.2011.5940884

P. Latkoski, O. Ognenoski, V. Rakovic, V. Atanasovski, L. Gavrilovska

引用次数: 1

Opportunities for white space usage in Australia 澳大利亚留白空间的使用机会

无线互联科技 Pub Date : 2011-07-05 DOI: 10.1109/WIRELESSVITAE.2011.5940841

B. Freyens, M. Loney

引用次数: 15

Discrete Fourier Transform based multimedia colour image authentication for wireless communication (DFTMCIAWC) 基于离散傅里叶变换的多媒体彩色图像无线通信认证(DFTMCIAWC)

无线互联科技 Pub Date : 2011-07-05 DOI: 10.1109/WIRELESSVITAE.2011.5940849

N. Ghoshal, J. K. Mandal

{"title":"Discrete Fourier Transform based multimedia colour image authentication for wireless communication (DFTMCIAWC)","authors":"N. Ghoshal, J. K. Mandal","doi":"10.1109/WIRELESSVITAE.2011.5940849","DOIUrl":"https://doi.org/10.1109/WIRELESSVITAE.2011.5940849","url":null,"abstract":"This paper presents a novel steganographic schemes based on Discrete Fourier Transformation (DFT) and demonstrates the multimedia colour image authentication process in frequency domain for wireless communication(DFTMCIAWC). Authentication is done through embedding secrete message/image into the transformed frequency components of the source image at message originating node. The DFT is applied on sub-image block called mask of size 2 × 2 in row major order where authenticating message/image bit is fabricated within the real frequency component of each source image byte except the first frequency component of each mask. In order to retain the quantum value positive and non fractional in spatial domain, a delicate readjustment phase is used in the first frequency component of each mask as a post embedding handler. Robustness is achieved through embedding secrete message/image into both positive and negatives frequency component of source image and invisibility is satisfied in spatial domain using delicate re-adjust phase. Inverse DFT (IDFT) is performed after embedding to transform embedded image from frequency domain to spatial domain and the embedded image is transmitted across the network. At the destination node authentication is done through extraction process of embedded image. Experimental results demonstrate that the proposed algorithm performs better than discrete cosine transformation and quaternion Fourier transformation based schemes, and provide security and originality of data in wireless domain.","PeriodicalId":68078,"journal":{"name":"无线互联科技","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91111234","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

Super-quasi-orthogonal space-time BPSK trellis coded OFDM system for four transmit antennas 四个发射天线的超拟正交空时BPSK栅格编码OFDM系统

无线互联科技 Pub Date : 2011-07-05 DOI: 10.1109/WIRELESSVITAE.2011.5940852

I. Oluwafemi, S. Mneney

引用次数: 4

Information content in reflected global navigation satellite system signals 反映全球导航卫星系统信号的信息内容

无线互联科技 Pub Date : 2011-07-05 DOI: 10.1109/WIRELESSVITAE.2011.5940894

P. Høeg, A. Carlstrom

{"title":"Information content in reflected global navigation satellite system signals","authors":"P. Høeg, A. Carlstrom","doi":"10.1109/WIRELESSVITAE.2011.5940894","DOIUrl":"https://doi.org/10.1109/WIRELESSVITAE.2011.5940894","url":null,"abstract":"The direct signals from satellites in global satellite navigation satellites systems (GNSS) as, GPS, GLONASS and GALILEO, constitute the primary source for positioning, navigation and timing from space. But also the reflected GNSS signals contain an important information content of signal travel times and the characteristics of the reflecting surfaces and structure. Ocean reflected signals from GNSS satellite systems reveal the mean height, the significant wave height and the roughness of the ocean. The estimated accuracy of the average surface height can be as low as 10 cm. For low elevations, the signals reveal the incoherent scatter process at the reflection zone. By using open-loop high-precision GNSS receivers, it is possible to provide the in-phase and quadrature components of the signal at high sample rates, which enables investigation of the spectral signatures of the observations. The retrieval method consists of a radio occultation technique for the phase differences between the direct and reflected signal combined with a statistical method. Results are derived through a sequential Bayesian estimation method, where the retrieval algorithms are based on a particle filtering technique. The horizontal size of the probability density function, which uniquely describes the ocean reflection zone using the recursive particle filter method, totals from 200 to 500 meters for all data sets.","PeriodicalId":68078,"journal":{"name":"无线互联科技","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87699278","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

Dynamic spectrum access and cognitive radio 动态频谱接入和认知无线电

无线互联科技 Pub Date : 2011-07-05 DOI: 10.1109/WIRELESSVITAE.2011.5940911

P. Tripathi, A. Chandra, Ambuj Kumar, K. Sridhara

引用次数: 54

Hybrid/integrated networking for NGN services NGN业务的混合/集成组网

无线互联科技 Pub Date : 2011-07-05 DOI: 10.1109/WIRELESSVITAE.2011.5940904

S. Kota

引用次数: 9

Interference management in self-organized femtocell networks: The BeFEMTO approach 自组织飞蜂窝网络中的干扰管理:BeFEMTO方法

无线互联科技 Pub Date : 2011-07-05 DOI: 10.1109/WIRELESSVITAE.2011.5940851

M. Bennis, L. Giupponi, E. M. Diaz, M. Lalam, Masood Maqbool, E. Strinati, A. De Domenico, M. Latva-aho

{"title":"Interference management in self-organized femtocell networks: The BeFEMTO approach","authors":"M. Bennis, L. Giupponi, E. M. Diaz, M. Lalam, Masood Maqbool, E. Strinati, A. De Domenico, M. Latva-aho","doi":"10.1109/WIRELESSVITAE.2011.5940851","DOIUrl":"https://doi.org/10.1109/WIRELESSVITAE.2011.5940851","url":null,"abstract":"Recently, femtocell technology has gained significant interest in the wireless communication community, as a potential solution for satisfying the rapid increase in demand for wireless access, improving the poor indoor coverage, and offloading the macrocell network. Operational deployment of uncoordinated femtocells sets out new technological challenges, among which are cross-tier interference between the macro and femtocells, and co-tier interference among femtocells, in the same spectrum band. The Broadband Evolved Femto networks (BeFEMTO) project addresses these technical challenges aiming at developing advanced femtocell technologies based on LTE-A, enabling a cost-efficient provisioning of ubiquitous broadband services. The BeFEMTO project also focuses on novel concepts such as self-organizing femtocell networks, in which the goal is to develop and evaluate solutions to limit the interference impact to end-users'. In this paper, we first give an overview of the BeFEMTO project followed by preliminary results based on recent development of distributed algorithms in context aware learning mechanisms. Next, the performance assessment of self-organizing radio resource management algorithms and interference mitigating techniques for macro-femtocell coexistence is given.","PeriodicalId":68078,"journal":{"name":"无线互联科技","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89707564","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: 32

Compact high gain CPW-fed slot antenna for WLAN/WiMAX applications 用于WLAN/WiMAX应用的紧凑型高增益cpw馈电槽天线

无线互联科技 Pub Date : 2011-07-05 DOI: 10.1109/WIRELESSVITAE.2011.5940831

S. Kareemulla, N. Gunavathi, S. Raghavan

引用次数: 3

How green the LTE technology can be? LTE技术到底有多环保?

无线互联科技 Pub Date : 2011-07-05 DOI: 10.1109/WIRELESSVITAE.2011.5940909

R. Kumar, Jagadeesh Gurugubelli

{"title":"How green the LTE technology can be?","authors":"R. Kumar, Jagadeesh Gurugubelli","doi":"10.1109/WIRELESSVITAE.2011.5940909","DOIUrl":"https://doi.org/10.1109/WIRELESSVITAE.2011.5940909","url":null,"abstract":"Reducing Carbon emissions in general in ICT from the present 3 percent and in particular in Mobile communications has been of a serious concern. In the next generation cellular technologies like LTE, base stations are very energy hungry, as they need to provide high spectral efficiency and wide coverage. Given that there is no cooling required for modern systems, the transmit power in a typical link is the most important constituent in a base station. This is mainly due to its power amplifiers and also due to energy loss in the power supply. LTE uses OFDM in downlink, which requires huge complex computations, and the power consumption of the transceiver hardware. With the latest CMOS technology, a two-fold reduction in the operating voltage from 130 nm technology to 22 nm technology, results in a four-fold reductions in the transceiver power consumption. With the LTE technology poised to take off, it is interesting to see the energy consumption assessment of LTE considering the projection of technology and exploiting the different mode of operation and the methods of reducing energy consumption. This paper discusses about the various possibilities and makes a practical assessment of a possible green form of LTE.","PeriodicalId":68078,"journal":{"name":"无线互联科技","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80651303","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: 74