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IEEE Transactions on Communication Technology最新文献

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A 12-MHz Transistor Repeater for the CP-12MTr 2700-Channel Transmission System 用于CP-12MTr 2700通道传输系统的12 mhz晶体管中继器
IEEE Transactions on Communication Technology Pub Date : 1967-08-01 DOI: 10.1109/TCOM.1967.1089635
G. Marubayashi, Y. Shigei
{"title":"A 12-MHz Transistor Repeater for the CP-12MTr 2700-Channel Transmission System","authors":"G. Marubayashi, Y. Shigei","doi":"10.1109/TCOM.1967.1089635","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089635","url":null,"abstract":"A 12-MHz transistor repeater design is described. Phase shift characteristics of transistor circuits are studied as a common problem in extending a bandwidth of the amplifier and repeater system design and experimental data are also presented.","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"35 10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125412304","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
Observations on the Effects of Pulse Noise in Digital Data Transmission Systems 数字数据传输系统中脉冲噪声影响的观察
IEEE Transactions on Communication Technology Pub Date : 1967-08-01 DOI: 10.1109/TCOM.1967.1089633
M. Kurland, D. Molony
{"title":"Observations on the Effects of Pulse Noise in Digital Data Transmission Systems","authors":"M. Kurland, D. Molony","doi":"10.1109/TCOM.1967.1089633","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089633","url":null,"abstract":"This paper presents some observations concerning the type of variability one might encounter in determining error rates in digital data transmission systems subjected to impulse noise. The effects of pulse shape and duration are investigated. It is shown that for signal-to-noise ratios (SNR) greater than -5 dB, a variation of 8 to 1 in the average number of errors per pulse might be encountered as pulse shape is varied. For pulsewidths in the range 0.1 to 4 ms, a variation of 6 to 1 in the average number of errors, per pulse at a given SNR could be expected. Experimental findings relating error rates to pulse duration were supported by analytical studies. The probability of making an error, given that a noise burst has occurred, is determined and a worst case analysis is made, from which a critical SNR is found such that if the noise is below this threshold, no errors can occur. It is recognized that the limitations imposed by the equipment available for study results in a loss in generality. However, the results presented are indicative of the type of variations one might encounter in the case of actual impulse noise on an existing practical system.","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125717180","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: 7
All Solid-State Parametric Amplifier for Broadband Radiolink at 2000 MHz 2000兆赫宽带无线链路全固态参数放大器
IEEE Transactions on Communication Technology Pub Date : 1967-08-01 DOI: 10.1109/TCOM.1967.1089627
E. Pivit
{"title":"All Solid-State Parametric Amplifier for Broadband Radiolink at 2000 MHz","authors":"E. Pivit","doi":"10.1109/TCOM.1967.1089627","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089627","url":null,"abstract":"A microwave amplifier using a varactor diode for improving the receiver noise figure is described. The amplifier is a stable, 2-diode type, with a coaxial signal circuit, a lumped element idler circuit, and a waveguide pump circuit. The design provides a 50-MHz bandwidth at 20-dB gain, and a noise temperature of 200°K. KEYWORDS: Amplifiers, Broadband, Design, Microwave Relay Systems, Signaling, Signal-to-Noise Ratio, Ultra-High Frequency.","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121646925","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
Hard-Limiter Intermodulation with Low Input Signal-to-Noise Ratio 低输入信噪比的硬限幅互调
IEEE Transactions on Communication Technology Pub Date : 1967-08-01 DOI: 10.1109/TCOM.1967.1089622
R. Kirlin
{"title":"Hard-Limiter Intermodulation with Low Input Signal-to-Noise Ratio","authors":"R. Kirlin","doi":"10.1109/TCOM.1967.1089622","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089622","url":null,"abstract":"A simple, closed form expression is derived for the normalized power magnitude of major intermodulation (IM) products at the output of an ideal bandpass hard-limiter with low input signal-to-noise ratio,(S/N)_{i}. This expression together with no-noise results obtained by a previous author allows quick plotting of the no-noise and high-noise asymptotes of the IM product magnitude vs.(S/N)_{i}, for any number of equal-power, input CW signals. Lastly, it is shown that for many signals it may be advantageous to operate the limiter at a lower(S/N)_{i}in order to suppress the intermodulation distortion.","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127743372","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
Quantizing for Correlation Decoding 量化相关解码
IEEE Transactions on Communication Technology Pub Date : 1967-08-01 DOI: 10.1109/TCOM.1967.1089615
R. Blizard
{"title":"Quantizing for Correlation Decoding","authors":"R. Blizard","doi":"10.1109/TCOM.1967.1089615","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089615","url":null,"abstract":"The increase in error rate due to quantizing is examined for the special case of a digital correlation decoder such as can be used for orthogonal and other block codes. Three types of effect are considered separately: 1) the increase in variance, which is proportional to the square of the quantum interval; 2) a threshold, proportional to the quantum interval, caused by the ambiguity when the received signal correlates equally with two code words; 3) the effect of limiting. Approximations are obtained for small quantizing loss, the case of greatest interest since the object of correlation decoding is high efficiency. For a 7-bit biorthogonal code and a total of 16 quantum levels the increase in error rate is computed as a function of the quantum interval, and an optimum is found.","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130367915","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
Excitation of Higher-Order Antenna Modes by Multipath Propagation 多径传播对高阶天线模式的激励
IEEE Transactions on Communication Technology Pub Date : 1967-08-01 DOI: 10.1109/TCOM.1967.1089637
E. Harkless, H. Lenzing
{"title":"Excitation of Higher-Order Antenna Modes by Multipath Propagation","authors":"E. Harkless, H. Lenzing","doi":"10.1109/TCOM.1967.1089637","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089637","url":null,"abstract":"Deep fading on microwave line-of-sight radio relay links is known to be caused by two or more rays arriving at the receiving antenna at slightly different angles in the vertical plane. Destructive interference between these rays can produce deep fades (30 dB or more) of the received signal. In the experiment described, it was found that deep fading is often accompanied by strong higher-order mode excitation of the receiving horn-reflector antenna. The particular higher-order mode measured in this experiment was theTE^{Box^{b}}_{02}, which is excited by horizontally polarized rays arriving off the antenna axis in the vertical plane. TheTE^{Box^{b}}_{02}mode as well as the dominantTE^{Box^{b}}_{01}mode of the receiving horn-reflector antenna were continuously monitored for the summer of 1966. The experiment was conducted on a 22.8 mile path in New Jersey at a frequency of 6 GHz. Statistical distributions for the received signal level in the dominant mode, as well as statistical distributions for optimum selection of theTE^{Box^{b}}_{01}andTE^{Box^{b}}_{02}signals, are presented.","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114385551","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
Design of the 46B Cable Carrier Terminal 46B电缆载波终端的设计
IEEE Transactions on Communication Technology Pub Date : 1967-08-01 DOI: 10.1109/TCOM.1967.1089638
L. Getgen
{"title":"Design of the 46B Cable Carrier Terminal","authors":"L. Getgen","doi":"10.1109/TCOM.1967.1089638","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089638","url":null,"abstract":"This paper describes the design of the 46B Cable Carrier Terminal. Included is a description of the modulation plan. A unique frequency correction and regeneration plan is used which provides absolute end-to-end synchronization. The noise improvement resulting from the use of an active-tracking (phase-lock) filter rather than a passive filter for pilot pickoff is described. Some general comments are made upon the relationship between level stability requirements expressed in statistical terms and in specific requirements thereby imposed on the circuit design. Measured performance values are given.","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115935902","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
Considerations Affecting the Mitigation of Noise Coupled Between Cable Pairs 影响降低电缆对间耦合噪声的注意事项
IEEE Transactions on Communication Technology Pub Date : 1967-08-01 DOI: 10.1109/TCOM.1967.1089621
H. Ward
{"title":"Considerations Affecting the Mitigation of Noise Coupled Between Cable Pairs","authors":"H. Ward","doi":"10.1109/TCOM.1967.1089621","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089621","url":null,"abstract":"Certain mitigative measures which can be employed against metallic noise coupled into telephone circuits in the outside plant are discussed. Quantitative restults are given for separate entrance cable, flat gain amplifiers, arid noise suppression coils. The model used appears to be well-suited to the typical impulse noise problem.","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"393-395 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127110994","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 Sequential Decoding Technique and Its Realization in the Lincoln Experimental Terminal 一种顺序解码技术及其在林肯实验终端上的实现
IEEE Transactions on Communication Technology Pub Date : 1967-08-01 DOI: 10.1109/TCOM.1967.1089642
I. Lebow, P. McHugh
{"title":"A Sequential Decoding Technique and Its Realization in the Lincoln Experimental Terminal","authors":"I. Lebow, P. McHugh","doi":"10.1109/TCOM.1967.1089642","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089642","url":null,"abstract":"Probabilistic codes when suitably matched to modulation-demodulation systems allow communications which realize the theoretical performance predicted by the coding theorem. Sequential decoding is a form of probabilistic coding which allows realization in practical equipment to achieve this end. The Lincoln Experimental Terminal (LET) uses convolutional encoding and sequential decoding matched to a modulation system employing a 16-ary orthogonal alphabet and matched filter envelope detectors, followed by an ordered list of the filters containing the 7 largest outputs. This coding system employing a constraint length of 60 bits and rates of 1 and 2 bits per orthogonal symbol achieves operation at an energy to noise ratio of 6 dB per information bit on an active satellite (Gaussian) channel. The Fano decoding algorithm is employed. After a brief description of this algorithm, the realization of the LET encoder-decoder is presented. The machine using a commercial magnetic core memory, together with about 2000 integrated circuit elements, occupies about 20 inches of 19-inch rack space.","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"158 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127229219","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
Engineering and Application Features of the 46B Cable Carrier System 46B电缆载波系统工程与应用特点
IEEE Transactions on Communication Technology Pub Date : 1967-08-01 DOI: 10.1109/TCOM.1967.1089623
P. Poling
{"title":"Engineering and Application Features of the 46B Cable Carrier System","authors":"P. Poling","doi":"10.1109/TCOM.1967.1089623","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089623","url":null,"abstract":"This paper describes a new 24-channel cable carrier system which is end-to-end compatible with the Western Electric N3. The synchronization technique is described, and the method used to provide synchronization when working end-to-end with an N3 terminal is discussed. Level stability, data transmission capability, and general considerations in the layout of the carrier frequency repeatered line are reviewed.","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124847204","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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