{"title":"Experimental Verification of a Model of the Oscillating Limiter","authors":"E. Bozzoni, U. Mengali","doi":"10.1109/TCOM.1967.1089681","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089681","url":null,"abstract":"Work done to verify the results of an analysis of the oscillating limiter published previously is reported upon in this paper. To this purpose experiments were made with an oscillating limiter, the characteristics of which are given, to check the nonlinear distortion produced on the baseband signals. The baseband equivalent circuit and nonlocking behavior of the oscillating limiter were also tested. Finally, a network for compensating the linear distortion produced in the message modulation by the oscillating limiter is shown, as well as experimental results.","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"951 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120929794","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":"A Least Squares Procedure for Aligning Antennas","authors":"L. Winkler","doi":"10.1109/TCOM.1967.1089684","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089684","url":null,"abstract":"A procedure is described for aligning transmitting and receiving antennas in a communications link with a minimum number of positionings of the antennas. A statistical formalization of the interpretation of the received signal levels permits that combination of receiving and transmitting antenna orientations to be chosen which most probably represents the aligned combination. A criterion is also developed for estimating the goodness of the alignment.","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"418 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126717779","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":"The Quatrix - A Proposed Electrooptical Position or Angle Sensor","authors":"B. Askowith","doi":"10.1109/TCOM.1967.1089667","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089667","url":null,"abstract":"This technique, called quatrix (for quasi-matrix), has potential application in numerous communication and datahandling areas, since it provides high-density matrix-photocell capability at much lower cost. The method uses a few photographically-produced precision coding masks fitted over an equal number (N) of photocells. Thus, ten (N) typical high-detectivity photocells and ten coding masks will produce 210(2N) binary combinations, behaving like a 32 by 32 matrix photodetector and using only 10 preamps. Twenty larger cells and preamps promise a million element matrix. Limitations are discussed.","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127870200","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":"Maximal-Ratio Diversity Combiners","authors":"N. Gaarder","doi":"10.1109/TCOM.1967.1089670","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089670","url":null,"abstract":"A diversity combiner with a structure which is common to many communication systems is described. When the combiner inputs are independent and identically distributed narrowband Gaussian random processes and the reference signals are timeinvariant, it is found that the combiner output can be conveniently represented as a function of a Gaussian random process, a chisquare variate, Gaussian variate, and known time functions. This representation clearly indicates the performance gain from diversity. In addition, it simplifies the evaluation of expectations of functions of the combiner output; recursion relations, with respect to the order of diversity, are found for these expectations. The results of this paper thus serve to unify and generalize many other results dealing with maximal-ratio diversity combiners; extensions of many well-known results can also be found by using the recursion relations.","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127940836","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":"Paper Categories and Review Criteria","authors":"H. Scudder, R. Slayton","doi":"10.1109/TCOM.1967.1089658","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089658","url":null,"abstract":"The TRANSACTIONS Editor replies to an inquiry regarding the differences between regular and concise papers, and the review procedures involved. Concise papers are short dissertations or condensations of longer papers, and do not contain the elaborative material normally associated with full Contributions. Both types are handled identically in the review and approval operations.","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128601467","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":"Bandlimiting Distortionless FSK Filters","authors":"W. McGee","doi":"10.1109/TCOM.1967.1089647","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089647","url":null,"abstract":"E. D. Sunde has found the bandlimiting filters for frequency-shift-keyed (FSK) signals satisfying Nyquist's first criterion. The frequency difference is equal to the signaling speed. The bandlimiting filters for FSK that produce signals to satisfy Nyquist's second criterion are determined here. The minimum bandwidth is equal to the signaling speed. The bandlimiting filter that produces signals satisfying both Nyquist critera for FSK is also determined. The minimum bandwidth required is twice the signaling speed.","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"143 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124543552","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":"Data Considerations for Planetary Space Science Photography","authors":"L. Malling","doi":"10.1109/TCOM.1967.1089657","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089657","url":null,"abstract":"Analog and digital data processes are discussed for interplanetary photoscience. Particular reference is made to the Mariner Mars flyby photo mission. A planetary flyby picture taking sequence produces a relatively fast accumulation of video data bits. This data is stored on magnetic tape. As the telemetry data rate at planetary range is extremely slow, days must elapse for continuous transmission of the stored picture information. A study of the analog and digital resolution criteria indicates that for the low contrast scenes viewed, a high SNR at the camera is desired. When the spacecraft is so limited in power, weight, and transmission capability, a ground based computer usefully enhances contrast and resolution.","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132530146","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":"A High-Speed Wideband L-Band Tunnel Diode Frequency Deviator","authors":"J. Goell","doi":"10.1109/TCOM.1967.1089653","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089653","url":null,"abstract":"An L-band tunnel diode frequency deviator which can be tuned over an octave bandwidth by a 160-millivolt change in input voltage is described. By using a nonreactive input circuit, a low-frequency prototype deviator has been tuned over a 50-percent frequency range in less than one RF cycle and an L-band deviator has had its frequency shifted and returned to its original value so that the output phase was shifted by ±90 degrees in 4.25 ± 0.25 cycles (3.27 ns).","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122874476","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":"A New Forward Acting Predetection Combiner","authors":"J. Boyhan","doi":"10.1109/TCOM.1967.1089652","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089652","url":null,"abstract":"A new predetection combiner has been devised which has superior performance to predetection and baseband combining systems previously used in troposcatter systems. In-phase addition at intermediate frequency is accomplished using a heterodyne phase stripping technique. A two-channel receiver using this principle has been tested, and performance is in reasonable agreement with theory. Performance was, in general, superior to a dual channel baseband combiner.","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127773844","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":"Automatic Intercept Service","authors":"W. Winckelmann","doi":"10.1109/TCOM.1967.1089655","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089655","url":null,"abstract":"The automatic intercept system described in this paper will route telephone calls for nonworking numbers to a centralized time division switch which connects the calling customer to a series of prerecorded announcements. The customer is told what number he has reached, the status of that number, and if available, the new number at which the called party may be reached.","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"130 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121194238","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}
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