发布求助
文献互助 智能选刊 最新文献

IEEE Transactions on Communication Technology最新文献

筛选
英文 中文
Digital Transmission Capabilities of a Transportable Troposcatter System 可移动对流层散射系统的数字传输能力
IEEE Transactions on Communication Technology Pub Date : 1967-06-01 DOI: 10.1109/TCOM.1967.1089588
H. Smith
{"title":"Digital Transmission Capabilities of a Transportable Troposcatter System","authors":"H. Smith","doi":"10.1109/TCOM.1967.1089588","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089588","url":null,"abstract":"The digital transmission performance of a transportable troposcatter station is evaluated as a function of path length. Equipment parameters are chosen to be representative of a compact full-scale terminal capable of serving a major switching facility. While error rate evaluations for troposcatter transmission have been made previously, they have generally corresponded to the conditions of specific systems. Here, a reasonable path model and set of transmission parameters, thought to be representative of practical situations, have been chosen to allow performance evaluations to be made over the full gamut of range, propagation frequency, and bit rate conditions that are of interest. The two modes of digital transmission considered are direct-carrier modulation and subcarrier modulation within an FDM-FM baseband. The error-rate estimates finally determined reflect error contributions from all causes, with enhancement achieved from diversity operation.","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"503 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122897129","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
Error Probabilities Due to Additive Combinations of Gaussian and Impulsive Noise 高斯噪声和脉冲噪声加性组合的误差概率
IEEE Transactions on Communication Technology Pub Date : 1967-06-01 DOI: 10.1109/TCOM.1967.1089608
R. Ziemer
{"title":"Error Probabilities Due to Additive Combinations of Gaussian and Impulsive Noise","authors":"R. Ziemer","doi":"10.1109/TCOM.1967.1089608","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089608","url":null,"abstract":"In this paper a Poisson impulse noise model is utilized to calculate error probability characteristics of a matched filter receiver operating in an additive combination of impulsive and Gaussian noise. Comparisons of the theoretical predictions are made with experimental data obtained from a simulated communication system. The results indicate that only a small amount of Gaussian noise power has a considerable effect on the probability of error for small signal-to-noise ratios (SNRs). Also, it is found that each noise component may be looked upon as acting separately, the Gaussian noise component dominating the error probability for low SNRs and the impulsive component dominating for high SNRs. Thus, approximate error probability curves may be calculated by using a result applicable for Gaussian interference at low SNRs, and an asymptotic formula corresponding to impulsive background noise at high SNRs.","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122646413","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: 25
On Transactions Publication Policies 关于交易及出版政策
IEEE Transactions on Communication Technology Pub Date : 1967-06-01 DOI: 10.1109/TCOM.1967.1089587
H. Cravis
{"title":"On Transactions Publication Policies","authors":"H. Cravis","doi":"10.1109/TCOM.1967.1089587","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089587","url":null,"abstract":"The TRANSACTIONS Editor replies to an inquiry regarding Communication Technology Group policies on publication of papers that have already been published elsewhere. The object is to provide ComTech members with important current developments in the communications art even though some apparent overlapping of publication may occur.","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125756830","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
On Coded Partially Phase-Coherent Communication Over a Gaussian Channel 高斯信道上编码部分相参通信的研究
IEEE Transactions on Communication Technology Pub Date : 1967-06-01 DOI: 10.1109/TCOM.1967.1089600
Chi-hau Chen
{"title":"On Coded Partially Phase-Coherent Communication Over a Gaussian Channel","authors":"Chi-hau Chen","doi":"10.1109/TCOM.1967.1089600","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089600","url":null,"abstract":"Error probabilities for 2northogonal signals under partially phase-coherent reception are derived by a simple method and then illustrated. The amount of phase coherence is related to the efective signal energy per bit to noise density ratio. The joint effect of timing error and noisy phase reference on system performance is examined in detail.","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121130902","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
Nonlinear Tuned Circuits 非线性调谐电路
IEEE Transactions on Communication Technology Pub Date : 1967-04-01 DOI: 10.1109/TCOM.1967.1089557
M. Chakera, M. Laughton
{"title":"Nonlinear Tuned Circuits","authors":"M. Chakera, M. Laughton","doi":"10.1109/TCOM.1967.1089557","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089557","url":null,"abstract":"An application of a ferrite core variable inductance is illustrated in an active amplifier feedback circuit. By this means a lock-on response of the amplifier to a drifting operating frequency was obtained over a wide bandwidth (62-82kHz when tuned to a 75-kHz carder). Without a full analysis of the dynamics of feedback control systems incorporating semi-saturated ferrite cores available only the results of some initial experiments are given.","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123175466","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
Discriminator Response to an FM Signal in a Fading Channel 衰落信道中调频信号的鉴别器响应
IEEE Transactions on Communication Technology Pub Date : 1967-04-01 DOI: 10.1109/TCOM.1967.1089580
D. Schilling, E. Nelson, K. Clarke
{"title":"Discriminator Response to an FM Signal in a Fading Channel","authors":"D. Schilling, E. Nelson, K. Clarke","doi":"10.1109/TCOM.1967.1089580","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089580","url":null,"abstract":"The response of an FM discriminator to a fading FM signal in additive Gaussian noise is obtained. The technique employed is based on the model of an FM discriminator proposed by Rice and extends his results of SNR (above, at, and below threshold) to the fading environment. While the technique employed is quite general, examples considering Rayleigh fading, and sinusoidal and Gaussian modulation are given. The use of diversity to combat threshold degradation is studied and the threshold of a discriminator using predetection combining diversity is found. Experimental results are shown to verity the theory.","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115185859","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: 20
Intermodulation Distortion of a Phase Locked Loop Demodulator 锁相环解调器的互调失真
IEEE Transactions on Communication Technology Pub Date : 1967-04-01 DOI: 10.1109/TCOM.1967.1089556
D. Schilling, M. Smirlock
{"title":"Intermodulation Distortion of a Phase Locked Loop Demodulator","authors":"D. Schilling, M. Smirlock","doi":"10.1109/TCOM.1967.1089556","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089556","url":null,"abstract":"The phase locked loop is often used in lieu of an FM discriminator because of its threshold extension capabilities. In many applications, such as in communication satellites, not only is a low threshold required, but also a high SNR. CCIR recommendations suggest an output SNR of more than 40 dB. At this output SNR the intermodulation distortion present in a phase locked loop becomes very important. This paper discusses the intermodulation distortion present in a phase locked loop and determines the effect of the system parameters on this IM distortion. One of the main purposes of the paper is to show that, in order to decrease the IM distortion, the ratio of input frequency deviation to the loop gain of the phase locked loop should be decreased. Experimental results verified the proposed theory. The IM distortion was less than -44 dB when the frequency deviation to loop gain ratio was less than 0.057 (for the test model).","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114484289","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
Simultaneous Transmission of Facsimile and Message Traffic Over a Microwave Baseband 在微波基带上传真和电文业务的同时传输
IEEE Transactions on Communication Technology Pub Date : 1967-04-01 DOI: 10.1109/TCOM.1967.1089559
F. Griffin, J. Lippard, L. Foiles
{"title":"Simultaneous Transmission of Facsimile and Message Traffic Over a Microwave Baseband","authors":"F. Griffin, J. Lippard, L. Foiles","doi":"10.1109/TCOM.1967.1089559","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089559","url":null,"abstract":"This paper addresses itself to the problem of adding a high-speed graphic, supergroup bandwidth data channel to an existing message loaded baseband. The complete results of a numerical approach obtained by use of a digital computer are presented, as well as practical design curves developed to assist system planners in calculating peak-to-rms factors and rms value of composite, data-plus-message, baseband loading. The analysis deals with one facsimile supergroup added to an existing microwave telecommunication system.","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129867231","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
Methods of capacity analysis for a message switching center 消息交换中心容量分析方法
IEEE Transactions on Communication Technology Pub Date : 1967-04-01 DOI: 10.1109/TCOM.1967.1089573
I. Goldhirsh
{"title":"Methods of capacity analysis for a message switching center","authors":"I. Goldhirsh","doi":"10.1109/TCOM.1967.1089573","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089573","url":null,"abstract":"This paper is concerned with the establishment of standard methods of analysis for the determination of the capacity of a computerized message switching center to process traffic. It presents a standard method for measuring the processing capacity of a message switching center by determining the number of processor instructions available in the center to process a message character. This quantity is then compared to the number of instructions required to process a message character through the center.","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131302480","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 Approach to Digital System Networks 数字系统网络的一种方法
IEEE Transactions on Communication Technology Pub Date : 1967-04-01 DOI: 10.1109/TCOM.1967.1089572
J. Mayo
{"title":"An Approach to Digital System Networks","authors":"J. Mayo","doi":"10.1109/TCOM.1967.1089572","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089572","url":null,"abstract":"The paper illustrates a straightforward approach to the design of digital multiplexes. The approach allows digital communication systems of various speeds to be readily interconnected to form a large scale digital network. A small fraction of the transmitted bits are reserved for housekeeping or network control functions. Special attention is focused on the fraction of transmitted bits that must be reserved as a function of network parameters. It is shown that good performance in a 3-speed network utilizing unlocked clocks can be obtained if two to three percent of the transmitted bits are devoted to network control (framing and synchronization).","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131998854","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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信