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Two frequency coherence measurements on a 55GHz mobile radio link 在55GHz移动无线电链路上的两次频率相干性测量
Journal of The Institution of Electronic and Radio Engineers Pub Date : 1988-12-01 DOI: 10.1049/JIERE.1988.0051
R. Cole, H. Thomas, G. L. Siqueira
{"title":"Two frequency coherence measurements on a 55GHz mobile radio link","authors":"R. Cole, H. Thomas, G. L. Siqueira","doi":"10.1049/JIERE.1988.0051","DOIUrl":"https://doi.org/10.1049/JIERE.1988.0051","url":null,"abstract":"Results obtained from a bandwidth study of multipath propagation at 55 GHz in a heavily built-up urban area are presented. A series of experiments in which two phase-correlated signals are transmitted at various frequency separations is described. Results indicate that 25 MHz is a good estimate for the coherence bandwidth in an urban multipath environment.","PeriodicalId":110414,"journal":{"name":"Journal of The Institution of Electronic and Radio Engineers","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127762595","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
Submarine optical fibre cable system applications 海底光缆系统的应用
Journal of The Institution of Electronic and Radio Engineers Pub Date : 1988-12-01 DOI: 10.1049/JIERE.1988.0047
S. Fox, I.F.A.G. Bedford
{"title":"Submarine optical fibre cable system applications","authors":"S. Fox, I.F.A.G. Bedford","doi":"10.1049/JIERE.1988.0047","DOIUrl":"https://doi.org/10.1049/JIERE.1988.0047","url":null,"abstract":"The transition from analogue coaxial cable to digital optical fibre submarine systems has required a new technology to be established and complementary technologies to be developed for the design, evaluation and operational support of these new systems. The common design parameter throughout is reliability; not only must the overall system design satisfy the reliability objective but the component parts must be shown to exhibit the necessary low level of failure for this to be achieved.1988 sees the commissioning of TAT-8, the first trans atlantic optical fibre submarine cable system. In addition a number of submarine cable systems linking the UK mainland with other British Islands and Europe will be made available. This paper reviews the current generation of submarine cable systems based on 1.3μm and emerging 1.55μm technologies and discusses the opportunities offered to planners and network operators from developments in networking, optical repeaters and non-silica fibres.","PeriodicalId":110414,"journal":{"name":"Journal of The Institution of Electronic and Radio Engineers","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129968789","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
The effects of atmospheric convective circulation on a narrow radio beam 大气对流环流对窄射电波束的影响
Journal of The Institution of Electronic and Radio Engineers Pub Date : 1988-12-01 DOI: 10.1049/JIERE.1988.0058
W. G. Burrows
{"title":"The effects of atmospheric convective circulation on a narrow radio beam","authors":"W. G. Burrows","doi":"10.1049/JIERE.1988.0058","DOIUrl":"https://doi.org/10.1049/JIERE.1988.0058","url":null,"abstract":"In considering the basic mechanism of heat exchange by convective circulation in the atmosphere it is apparent that the resultant thermal cell structure, as proposed by Benard, may possess refractive index properties which will influence the cross-sectional shape of a narrow conical radio beam. A simplified classical toroidal cell is considered for the purpose of analysis to show that the core of such a cell in the atmosphere may act as a cylindrical concave lens. The resultant distortion of a narrow beam is discussed, and the concept is then developed further to show that trans-horizon propagation may result from an in-line array of thermal cells.","PeriodicalId":110414,"journal":{"name":"Journal of The Institution of Electronic and Radio Engineers","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131474567","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
A simple design method for transitional Butterworth-Chebyshev filters 过渡巴特沃斯-切比雪夫滤波器的一种简单设计方法
Journal of The Institution of Electronic and Radio Engineers Pub Date : 1988-12-01 DOI: 10.1049/JIERE.1988.0072
C. Gargour, V. Ramachandran
{"title":"A simple design method for transitional Butterworth-Chebyshev filters","authors":"C. Gargour, V. Ramachandran","doi":"10.1049/JIERE.1988.0072","DOIUrl":"https://doi.org/10.1049/JIERE.1988.0072","url":null,"abstract":"Some properties of the Transitional Butterworth—Chebyshev (TBC) filters are studied and a simple design method to obtain such filters is given. For a magnitude specification, the order of the transitional filter obtained will be the same as that of, or at most one higher than that of, the corresponding Chebyshev filter. In addition, the linearity of the phase response is improved.","PeriodicalId":110414,"journal":{"name":"Journal of The Institution of Electronic and Radio Engineers","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131510466","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
The need for propagation studies 繁殖研究的需要
Journal of The Institution of Electronic and Radio Engineers Pub Date : 1988-12-01 DOI: 10.1049/JIERE.1988.0050
L. Barclay
{"title":"The need for propagation studies","authors":"L. Barclay","doi":"10.1049/JIERE.1988.0050","DOIUrl":"https://doi.org/10.1049/JIERE.1988.0050","url":null,"abstract":"Although radio-wave propagation has been studied over a considerable period of time, there is a continuing and expanding need for new studies. The requirements for communication, and particularly for the transmission of data signals, necessitate studies in more detail than previously, if reliable statistics for the determination of system performance are to be established. New technologies open up the possibility for economic communication at higher frequencies, and new applications. Each application seeks to stretch the propagation performance to its limits. This paper outlines four key areas where new propagation data are urgently required. The mobile services are expanding extremely fast with the aim of providing personal communications to individuals on the move. Increased use of the radio spectrum for both terrestrial and space communications involves considerable frequency sharing with the need to plan and co-ordinate services effectively. Because of the nature of radio-wave propagation such co-ordination is international, and prediction methods are required for use by future World Administrative Radio Conferences. Developments in radio technology now allow communications at millimetric wavelengths to be considered, and detailed propagation information is still required. At the other end of the spectrum propagation via the ionosphere continues to offer a cheap and flexible means of communicating over long distances, but additional information is required to facilitate the design of automatic systems and digital modulation methods.","PeriodicalId":110414,"journal":{"name":"Journal of The Institution of Electronic and Radio Engineers","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125083443","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
Basic physics of the ionosphere: a tutorial review 电离层的基本物理:教程回顾
Journal of The Institution of Electronic and Radio Engineers Pub Date : 1988-12-01 DOI: 10.1049/JIERE.1988.0060
H. Rishbeth
{"title":"Basic physics of the ionosphere: a tutorial review","authors":"H. Rishbeth","doi":"10.1049/JIERE.1988.0060","DOIUrl":"https://doi.org/10.1049/JIERE.1988.0060","url":null,"abstract":"This paper is an exposition of the basic physics of the ionosphere, according to the present understanding. It concentrates on the large-scale ionospheric structure at heights above 100 km. Since the ionosphere depends greatly on the structure and dynamics of the neutral atmosphere from which it is formed, and on the geomagnetic field, brief descriptions of these are given. The paper then reviews the theoretical structure of the ionospheric layers and discusses the most important ionospheric phenomena. It concludes with a summary of recent progress and outstanding questions, and a bibliography for further reading.","PeriodicalId":110414,"journal":{"name":"Journal of The Institution of Electronic and Radio Engineers","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130722556","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: 33
Wave and current sensing by HF radar 高频雷达感应波流
Journal of The Institution of Electronic and Radio Engineers Pub Date : 1988-12-01 DOI: 10.1049/JIERE.1988.0034
S. Kingsley, S. Rotheram
{"title":"Wave and current sensing by HF radar","authors":"S. Kingsley, S. Rotheram","doi":"10.1049/JIERE.1988.0034","DOIUrl":"https://doi.org/10.1049/JIERE.1988.0034","url":null,"abstract":"A brief review of HF radio oceanography is given together with an assessment of the difficulties in extending this to include wave sensing. Various methods of estimating the two-dimensional spectrum of waves on the sea surface from one-dimensional radar Doppler spectra are considered and a technique is proposed based on the maximum entropy method.It is shown that if a pair of ‘vector’ radars are used to provide two independent views of the same patch of sea then further information can be gained by operating the radars bistatically. Observations made at Flamborough Head in March 1986 are used to test a few of the basic properties of the theoretical bistatic cross-section of the sea surface.","PeriodicalId":110414,"journal":{"name":"Journal of The Institution of Electronic and Radio Engineers","volume":"139 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131247323","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
New screened room techniques for the measurement of RFI 测量RFI的新筛选室技术
Journal of The Institution of Electronic and Radio Engineers Pub Date : 1988-12-01 DOI: 10.1049/JIERE.1988.0004
L. Dawson, A. Marvin
{"title":"New screened room techniques for the measurement of RFI","authors":"L. Dawson, A. Marvin","doi":"10.1049/JIERE.1988.0004","DOIUrl":"https://doi.org/10.1049/JIERE.1988.0004","url":null,"abstract":"The electromagnetic field measured in a screened room is dependent on the size and geometry of the room, the type of source (electric or magnetic dipole) and the dipole moment. In this paper, computer models based on TEM wave propagation within a screened room are used to describe the fields measured from a source inside the room. The models are used to predict the results of changes in the test set-up which enable qualitative measurements of the dipole type and moment to be undertaken.","PeriodicalId":110414,"journal":{"name":"Journal of The Institution of Electronic and Radio Engineers","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133711225","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: 14
Distortion of radio wave signals by wind turbines 风力涡轮机造成的无线电波信号失真
Journal of The Institution of Electronic and Radio Engineers Pub Date : 1988-12-01 DOI: 10.1049/JIERE.1988.0061
J. Causebrook
{"title":"Distortion of radio wave signals by wind turbines","authors":"J. Causebrook","doi":"10.1049/JIERE.1988.0061","DOIUrl":"https://doi.org/10.1049/JIERE.1988.0061","url":null,"abstract":"Power-generating wind turbines are becoming more widespread and of larger size. Evidence of distortion caused to terrestrial television broadcast services by some of these prompted the IBA into studying the problem, the results of which are given in this paper. These results should have some relevance to any form of radio wave service.Some references are given to existing literature, the theory is discussed and extended, experiments using microwaves and a model of a turbine are reported as well as measurements made round an actual turbine. Proposals are then made for a way in which the degree of damage caused to radio wave services may be predicted. Thus, the paper provides a way in which radio wave and wind turbine engineers may work together to find sites and other parameters which will allow harmonious co-existence.","PeriodicalId":110414,"journal":{"name":"Journal of The Institution of Electronic and Radio Engineers","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124941968","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
Two-level-search minimum distance decoding for binary block codes 二进制分组码的两级搜索最小距离译码
Journal of The Institution of Electronic and Radio Engineers Pub Date : 1988-12-01 DOI: 10.1049/JIERE.1988.0075
M. El-Agamy, E. Munday
{"title":"Two-level-search minimum distance decoding for binary block codes","authors":"M. El-Agamy, E. Munday","doi":"10.1049/JIERE.1988.0075","DOIUrl":"https://doi.org/10.1049/JIERE.1988.0075","url":null,"abstract":"A new reduced-search minimum distance decoding algorithm for binary block codes is proposed. The time taken in searching for the nearest code word is reduced when all code words are grouped into classes and then each class into subclasses. The first classification is performed using the code weight distribution whilst the second (or subclass) level uses the weight distribution in some N-coordinates. The order of search is determined from statistical data based on the weight of the received vector and channel statistics.","PeriodicalId":110414,"journal":{"name":"Journal of The Institution of Electronic and Radio Engineers","volume":"141 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133603591","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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