1980 IEEE International Symposium on Electromagnetic Compatibility最新文献

{"title":"Impedance of a Four Element Circular Array Over a Finite Ground Plane","authors":"M. J. Burns","doi":"10.1109/ISEMC.1980.7567293","DOIUrl":"https://doi.org/10.1109/ISEMC.1980.7567293","url":null,"abstract":"","PeriodicalId":448304,"journal":{"name":"1980 IEEE International Symposium on Electromagnetic Compatibility","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125484042","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}

{"title":"Suppression of Electromagnetic Impulse Noises by Synchronous Matched Filters","authors":"Y. Tanada, H. Sano","doi":"10.1109/ISEMC.1980.7567318","DOIUrl":"https://doi.org/10.1109/ISEMC.1980.7567318","url":null,"abstract":"The electromagnetic impulse noise with the infinitesimal duration and the Gaussian amplitude distribution can be treated as the white Gaussian noise in spite of its sparse appearance. Under the existence of the impulse noise the correlation de­ tector for the known-waveform signal is optimized by the waveform matching: the optimized detector is the synchronous matched filter. The matched filter is simply explained in the spectral domain of the orthogonal functions such as the Walsh functions and the sinusoidal functions and is realized by the orthogonal transform pro­ cessor, to be applied to the signal measurement and the data transmission. The matched filter through the. Walsh waveform analyzer is effectively applied to the signal mea­ surement of the photoelectric pulse signals. It is shown that the orthogonal matched filters in the data transmission system based on the ortho­ gonal transform can suppress the power of the addi­ tive impulse noise due to time-averaging.","PeriodicalId":448304,"journal":{"name":"1980 IEEE International Symposium on Electromagnetic Compatibility","volume":"366 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122832374","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}

{"title":"Application of Orthonormalized M-Sequences for Data Reduced and Error Protected Transmission of Pictures","authors":"H. Grallert","doi":"10.1109/ISEMC.1980.7567303","DOIUrl":"https://doi.org/10.1109/ISEMC.1980.7567303","url":null,"abstract":"With help of n-stage feedback shiftregisters it is possible to generate periodical pulse-trains of maximum length. By orthonormalizing these pulse' trains you get a deterministic ortho­ normal binary function-system, which allows to realize a signaltransform (M-transform), similiar to the Fourieror Walshtransform. Some details of the m-functions and the M-transform are represented in the following. The M-transform is applied to non-moving greylevel-pictures. Procedures for data reduction in the M-spectrum and consequences of channel noise are discussed. The technical realization of the M-transform is very easy with help of new integrated circuits. 1. ONE-DIMENSIONAL m-FUNCTTONS 1.1 Generation of m-Sequences With help of n-stage feedback shiftregisters it is possible to generate periodical two-level pulse-trains with maximum lenght /1/. The pulse-trains are called m-sequences (maximum-lengthsequences). Their period is p = 2n1. (1.1) These m-sequences are described by Golomb for the first time in 1962 /1/. In the meantime they are applied to coding of signals /2/ and to stochastic computing /3/. Figure 1 shows a four-stage feedback shiftregister, which produces m-sequences of period p = 2^-1 = 15. clock Fig. 1: Four-stage feedback shiftregister for the generation of m-sequences. The m-sequence, generated by the register in fig. 1, is 1 o o o 1 o o 1 1 o 1 o 1 1 1 1 o ( 1 . 2 ) To realize a transform similiar to Fourieror Walshtransform it is neces­ sary to orthonormalize the m-sequences. 1.2 One-Dimensional m-Functions The orthonormalization of m-sequences with p = 15 is described in the follow­ ing. The proof for orthonormalization of m-sequences with any possible period is shown in /4/. A system of orthonormalized m-sequences (m-functions) is developed by carry­ ing out the following points: a) By shifting a m-sequence cyclically for p times you get a set of p pulse-trains with amplitudes 0 and 1 (fig. 2) b) The amplitudes of the m-sequences are now called A and B (1 -*• A, 0 B) (fig. 3) c) By orthonormalizing this functionsystem (with amplitudes A and B) it is possible to calculate the ampli­ tudes A and B. The condition for orthonormalization reads: CH1538-8/80/0000-0282$00.75 © 1980 IEEE 282 / ^ (0) ml (0)d0= { 0 k + 1 (1l3) Then the equations for calculating A and B in fig. 3 run as follows: 8_ A 2 + 7_ 2 = 1 15 A + 15 B n 3 B 2 + 8 A B + 4 A 2 = 0 (1.4) . I 0 0 0 I 0 0 I I 0 1 0 I I I i n n n 0 / / / _L Ji_ru i","PeriodicalId":448304,"journal":{"name":"1980 IEEE International Symposium on Electromagnetic Compatibility","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116238316","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}

{"title":"Statistical Model for EMC Analysis of Wideband Out-Of-Band Phased Arrays","authors":"B. Cown, R. Moore, C. Ryan","doi":"10.1109/ISEMC.1980.7567278","DOIUrl":"https://doi.org/10.1109/ISEMC.1980.7567278","url":null,"abstract":"","PeriodicalId":448304,"journal":{"name":"1980 IEEE International Symposium on Electromagnetic Compatibility","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116454668","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}

{"title":"Modeling Techniques for Discrete Passive Components to Include Parasitic Effects in EMC Analysis and Design","authors":"J. A. Woody, C. Paludi","doi":"10.1109/ISEMC.1980.7567261","DOIUrl":"https://doi.org/10.1109/ISEMC.1980.7567261","url":null,"abstract":"Circuit modeling techniques have been devel­ oped to account for the parasitic behavior of discrete passive components (resistors, capaci­ tors, inductors) for frequencies up to 1 GHz using manufacturers data and simplified measure­ ment techniques. The resultant circuit models can be used both with computer-aided-analysis/ design/synthesis programs (e.g., NCAP, SPICE, SCEPTRE) and with hand-held calculators to ac­ curately account for appropriate responses in the frequency domain. Thus, use of these tech­ niques will provide more accurate designs for EMC and more precise EMI prediction capabilities particularly at the printed circuit board (pcb) level.","PeriodicalId":448304,"journal":{"name":"1980 IEEE International Symposium on Electromagnetic Compatibility","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116456448","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}

{"title":"Nonsinusoidal Waves - When To Use Them","authors":"H. Harmuth","doi":"10.1109/ISEMC.1980.7567255","DOIUrl":"https://doi.org/10.1109/ISEMC.1980.7567255","url":null,"abstract":"","PeriodicalId":448304,"journal":{"name":"1980 IEEE International Symposium on Electromagnetic Compatibility","volume":"197 3-4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134289921","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}

{"title":"Assessment of Federal Telecommunications Systems for Spectrum Supportability","authors":"Robert R. Seach, C. Karow","doi":"10.1109/ISEMC.1980.7567276","DOIUrl":"https://doi.org/10.1109/ISEMC.1980.7567276","url":null,"abstract":"The responsibility for management of the Fed­ eral Government use of the radio frequency spectrum is assigned to the National Telecommunication and Information Administration (NTIA) by Executive Order 12046. In addition, the Office of Management and Budget (OMB) has specified that Federal Agen­ cies will obtain NTIA certification that frequency spectrum is available to satisfy the needs of major Communications-Electronics systems in development or procurement before budget estimates for that agency are submitted to OMB. NTIA has promulgated rules and regulations for the use of the spectrum which specify that systems will be reviewed at different stages of their life cycle, i.e., stages 1, 2, 3 and 4. The major purpose of these reviews is to assess the spectrum supportability prior to the expenditure of large amounts of monies. This paper describes the details of the system assess­ ment which includes consideration of data adequacy, frequency allocations, standards, radiation hazards, coordination, wartime considerations and electro­ magnetic compatibility, etc. The purpose of the paper is to provide the telecommunication system developer with an insight into the review process necessary to assure that his system will receive spectrum support.","PeriodicalId":448304,"journal":{"name":"1980 IEEE International Symposium on Electromagnetic Compatibility","volume":"147 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130926974","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}

{"title":"Practical Aspects of Man-Made Radio Noise that Affect Radio-Spectrum Management","authors":"W. Vincent","doi":"10.1109/ISEMC.1980.7567273","DOIUrl":"https://doi.org/10.1109/ISEMC.1980.7567273","url":null,"abstract":"A number of problems encountered during the measurement and definition of man-made radio noise are described. Examples are used to illustrate the impact of each problem identified on noise data. A poor data base and poor understanding of man-made radio noise, in turn, often leads to the improper interpretation of the problems of manmade noise involved in radio-spectrum management. INTRODUCTION AND BACKGROUND Man-made radio noise has been a problem for communicators and radio-spectrum managers since the early days of radio. Even though hundreds of experts are available to solve specific man-made noise and EMC problems, a general solution has not been found. The overall man-made radio noise problems almost defy the common man's attempts at control or solution. A few years ago George Hagn summarized the various definitions and descriptors of man-made radio noise.1 An eight page paper was, required by Hagn to describe just briefly the various defini­ tions for man-made noise. I have been impressed by the inability of radio noise and EMC experts, and radio spectrum managers, to reduce Hagn's paper to a more suitable single page or even a single paragraph. The man-made radio noise and EMC problems and issues continue to grow with considerable lack of respect for control or management. Additional details about some aspects of the measurement and definition of man-made noise have been gathered over the past few years. Some, often neglected, factors involved in the measurement, definition and control of man-made radio noise are presented in this paper.","PeriodicalId":448304,"journal":{"name":"1980 IEEE International Symposium on Electromagnetic Compatibility","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114463711","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}

{"title":"Contact Resistance and Porpoising Effects in Braid Shielded Cables","authors":"P. Madle","doi":"10.1109/ISEMC.1980.7567291","DOIUrl":"https://doi.org/10.1109/ISEMC.1980.7567291","url":null,"abstract":"Current practice treats braided metal shields as perforated metal pipes. Calculations of diffu­ sion of electromagnetic energy through-the metal thickness and coupling through the apertures satisfactorily explain the performance of some braided shields. This paper explains another coupling mechanism, termed \"porpoising,\" which takes into account details of the braid weave pattern and contact resistance between braid wires as they cross each other in passing from the exterior to the interior of the shield. The porpoising mechanism dominates the shielding performance of some braided shields.","PeriodicalId":448304,"journal":{"name":"1980 IEEE International Symposium on Electromagnetic Compatibility","volume":"101-B 8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115016480","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}

{"title":"Nonlinear Communications Receiver Model","authors":"A. Rosen, Dominic Leung, M. Maiuzzo","doi":"10.1109/ISEMC.1980.7567264","DOIUrl":"https://doi.org/10.1109/ISEMC.1980.7567264","url":null,"abstract":"An automated receiver model for estimating spurious response and two-signal intermodulation levels is presented. It simulates MIL-STD-449D type measurements. Estimates are made based on receiver characteristics up to the IF output. Taylor-Fourier series coefficients represent the mixer(s). Taylor series coefficients represent the amplifier(s), and CW gain/rejection versus frequency characteristics represent filters. The model was used to predict the responses of a KWM-2 AM receiver. The mean difference between calculated and measured power levels was -0.1 dB. The standard deviation of the differences was 4.6 dB. The model accepts standard component specifications values (such as the 1 dB gain compression level) for the amplifier(s) and mixer(s), from which appropriate series coefficients are derived. Alternatively, the series coefficients can be input. The filters' characteristics may be input as discrete points or the equivalent Butterworth filter parameters.","PeriodicalId":448304,"journal":{"name":"1980 IEEE International Symposium on Electromagnetic Compatibility","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116855721","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}