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A Simple Algorithm for Delta Modulators with Delayed Decision 延迟判决增量调制器的一种简单算法
MILCOM 1984 - IEEE Military Communications Conference Pub Date : 1984-10-01 DOI: 10.1109/MILCOM.1984.4794906
E. Feria, N. Scheinberg, J. Barba, D. Schilling
{"title":"A Simple Algorithm for Delta Modulators with Delayed Decision","authors":"E. Feria, N. Scheinberg, J. Barba, D. Schilling","doi":"10.1109/MILCOM.1984.4794906","DOIUrl":"https://doi.org/10.1109/MILCOM.1984.4794906","url":null,"abstract":"Several different adaptive delta modulator (ADM) algorithms have been described in the literature over the past 15 years. Researchers [1] and [2] have shown that the performance of these algorithms can be improved by using \"look ahead encoding\" (also referred to as \"delayed decision encoding\"). In this paper we will present a general technique that can be used with any of these algorithms to effect a one stage look ahead. The technique presented in this paper has the advantage that it does not require the calculation of two encoding paths nor does it require the decision circuitry to choose the optimum path that minimizes a mean square error or absolute error criterion.","PeriodicalId":375763,"journal":{"name":"MILCOM 1984 - IEEE Military Communications Conference","volume":"280 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1984-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122265384","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
Adaptive Link Power Control 自适应链路功率控制
MILCOM 1984 - IEEE Military Communications Conference Pub Date : 1984-10-01 DOI: 10.1109/MILCOM.1984.4795027
Terry L. Harrison, Donald G. Fulop, Robert C. Perle
{"title":"Adaptive Link Power Control","authors":"Terry L. Harrison, Donald G. Fulop, Robert C. Perle","doi":"10.1109/MILCOM.1984.4795027","DOIUrl":"https://doi.org/10.1109/MILCOM.1984.4795027","url":null,"abstract":"Satellite system users attempt to minimize signal attenuation problems introduced by precipitation through the use of higher power level transmission in the absence of fading. Adaptive Link Power Control (ALPC) provides an alternate solution to this problem and better utilizes satellite resources. ALPC accomplishes this by monitoring received signal quality and automatically controlling the transmit power level for individual digital communication links; thereby compensating on a near-real-time basis for transmission path anomalies. In other words, ALPC allocates to each communication link only that power which is required to produce a predetermined signal quality at the receiving station regardless of the rapid or irregular onset of signal attenuation. This allocation of resources eliminates the need for a customary continuous transmission level of 6 dB above that which is required for clear-sky conditions. ALPC, therefore, lowers link power requirements and allows the satellite to handle more links, maintain more power in reserve, and automatically provide additional power upon demand.","PeriodicalId":375763,"journal":{"name":"MILCOM 1984 - IEEE Military Communications Conference","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1984-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122312574","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
Experimental S Band Adaptive Array 实验S波段自适应阵列
MILCOM 1984 - IEEE Military Communications Conference Pub Date : 1984-10-01 DOI: 10.1109/MILCOM.1984.4795022
A. Cherrette, J. F. O'Connor, D. Chang, G. G. Kuhn
{"title":"Experimental S Band Adaptive Array","authors":"A. Cherrette, J. F. O'Connor, D. Chang, G. G. Kuhn","doi":"10.1109/MILCOM.1984.4795022","DOIUrl":"https://doi.org/10.1109/MILCOM.1984.4795022","url":null,"abstract":"Hughes Aircraft Company has developed an experimental S band adaptive array to study the operating principles behind adaptive nulling. One of the main objectives in testing the adaptive array was to see what kind of performance could be expected from a complete system operating in a real signal environment. Range tests were conducted at one of the company's testing facilities, and some of the results on performance are presented in this paper.","PeriodicalId":375763,"journal":{"name":"MILCOM 1984 - IEEE Military Communications Conference","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1984-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131400401","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
Mathematical Methodology for Analysis of the Adaptive A/D Converter in Combined CW and Gaussian Interference 连续波和高斯混合干扰下自适应A/D转换器分析的数学方法
MILCOM 1984 - IEEE Military Communications Conference Pub Date : 1984-10-01 DOI: 10.1109/MILCOM.1984.4794910
J. L. Bricker
{"title":"Mathematical Methodology for Analysis of the Adaptive A/D Converter in Combined CW and Gaussian Interference","authors":"J. L. Bricker","doi":"10.1109/MILCOM.1984.4794910","DOIUrl":"https://doi.org/10.1109/MILCOM.1984.4794910","url":null,"abstract":"The purpose of the present study, a companion paper to that presented by F. Amoroso on Adaptive A/D Converter Performance, is to provide the mathematical basis for the results described in the earlier paper. Emphasis is placed on several algorithms for computation of the distribution function, F(X), of combined CW and Gaussian noise via Fast Fourier Transform and Gaussian quadrature methods, and an explicit series representation of F(X) is provided in terms of gamma and confluent hypergeometric functions. The methodology for relating F(X) to conversion gain, Gc, which is the basic performance measure for the A/D converter, is also explored.","PeriodicalId":375763,"journal":{"name":"MILCOM 1984 - IEEE Military Communications Conference","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1984-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116799964","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
Oblique Ionograms and HF Propagation Assessment 倾斜电离图和高频传播评估
MILCOM 1984 - IEEE Military Communications Conference Pub Date : 1984-10-01 DOI: 10.1109/MILCOM.1984.4794845
M. Reilly, E. Yamamura
{"title":"Oblique Ionograms and HF Propagation Assessment","authors":"M. Reilly, E. Yamamura","doi":"10.1109/MILCOM.1984.4794845","DOIUrl":"https://doi.org/10.1109/MILCOM.1984.4794845","url":null,"abstract":"The capability for efficient management of HF frequency resources arises from a system which can accurately forecast the HF propagation characteristics of a set of communication links. It is discussed how such a system can be based on strategic deployment of HF sounders, coupled with a particular data analysis plan. Results are demonstrated with respect to the processing of data from a particular oblique-incidence sounder network.","PeriodicalId":375763,"journal":{"name":"MILCOM 1984 - IEEE Military Communications Conference","volume":"460 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1984-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123373700","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
Performance Modeling of Protocols 协议的性能建模
MILCOM 1984 - IEEE Military Communications Conference Pub Date : 1984-10-01 DOI: 10.1109/MILCOM.1984.4795000
C. Landauer
{"title":"Performance Modeling of Protocols","authors":"C. Landauer","doi":"10.1109/MILCOM.1984.4795000","DOIUrl":"https://doi.org/10.1109/MILCOM.1984.4795000","url":null,"abstract":"One of the unpleasant surprises in many communication systems has been the difficulty of designing the protocols used to meet the performance requirements of the system application. We include system correctness as a performance requirement. Some of the problems are common to the early design phase of any large program, but the lack of adequate design tools is more serious in the case of concurrent systems, since the timing anomalies and other glitches are extremely hard to predict by ad hoc methods. This paper describes two formal notational mechanisms that assist the modeler in discovering and defining all of the assumptions that go into a system design. These mechanisms are being incorporated into a simulation laboratory aimed at providing complete formal specifications of digital communication systems at the early design stages.","PeriodicalId":375763,"journal":{"name":"MILCOM 1984 - IEEE Military Communications Conference","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1984-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127506398","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: 3
Surface-Acoustic-Wave Multipath Combiner Development for Satellite Communication Receivers 卫星通信接收机用表面声波多径组合器的研制
MILCOM 1984 - IEEE Military Communications Conference Pub Date : 1984-10-01 DOI: 10.1109/MILCOM.1984.4794858
E. Tsui, R. Ibaraki, C. Rios
{"title":"Surface-Acoustic-Wave Multipath Combiner Development for Satellite Communication Receivers","authors":"E. Tsui, R. Ibaraki, C. Rios","doi":"10.1109/MILCOM.1984.4794858","DOIUrl":"https://doi.org/10.1109/MILCOM.1984.4794858","url":null,"abstract":"A simple, inexpensive Surface Acoustic Wave (SAW) convolver based receiver was developed to implement a post detection integration multipath combining receiver to improve digital PSK communication through a multipath environment. High performance SAW convolvers are presently available as off-the-shelf components and these SAW devices provide the technology to extract multiple correlations from spread-spectrum signals to allow mitigation of multipath caused by frequency-selective fading. Bit error rate measurements were obtained for a fixed multipath channel and compared favorably with computer simulation performance predictions. A novel technique of using a Charge-Coupled-Device (CCD) time-base compressor to enable an off-the-shelf SAW convolver with 20 MHz band-width and 16 us delay to be used to match filter over a 100 us window was demonstrated. This study has demonstrated, via a breadboard prototype, the feasibility of performing multipath combining with off-the-shelf SAW devices.","PeriodicalId":375763,"journal":{"name":"MILCOM 1984 - IEEE Military Communications Conference","volume":"119 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1984-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123259823","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
Diversity Combining for Frequency-Hop Spread-Spectrum Communications with Partial-Band Interference 部分频带干扰下频跳扩频通信的分集组合
MILCOM 1984 - IEEE Military Communications Conference Pub Date : 1984-10-01 DOI: 10.1109/MILCOM.1984.4794894
C. M. Keller, M. Pursley
{"title":"Diversity Combining for Frequency-Hop Spread-Spectrum Communications with Partial-Band Interference","authors":"C. M. Keller, M. Pursley","doi":"10.1109/MILCOM.1984.4794894","DOIUrl":"https://doi.org/10.1109/MILCOM.1984.4794894","url":null,"abstract":"Several diversity combining techniques are considered for frequency-hop communication systems with M-ary orthogonal signaling and noncoherent demodulation in the presence of uniform Gaussian noise and partial-band Gaussian noise. Some of the results apply to general (non-Gaussian) partial-band interference. Among the techniques described are square-law combining, linear combining, and linear combining of the outputs of the cascade of an envelope detector followed by a clipper. The primary goal is to find combining techniques which perform well in an unknown or changing interference environment.","PeriodicalId":375763,"journal":{"name":"MILCOM 1984 - IEEE Military Communications Conference","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1984-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126283424","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: 6
Hierarchical Routing for Very Large Networks 超大型网络的分层路由
MILCOM 1984 - IEEE Military Communications Conference Pub Date : 1984-10-01 DOI: 10.1109/MILCOM.1984.4794999
J. Westcott, G. Lauer
{"title":"Hierarchical Routing for Very Large Networks","authors":"J. Westcott, G. Lauer","doi":"10.1109/MILCOM.1984.4794999","DOIUrl":"https://doi.org/10.1109/MILCOM.1984.4794999","url":null,"abstract":"This paper presents a hierarchical routing design undergoing implementation for the Survivable Packet Radio network project (SURAN) under the auspices of The Defense Advanced Research Project Agency. As in the previous Packet Radio network, this network is built on a carrier sense, multiple access broadcast channel and is populated with mobile store and forward nodes known as packet radio units, or PRs. The goals of SURAN are to create a large distributed network of 1,000 to 10,000 nodes with a redundant, fluid control structure that is capable of surviving the loss of components and other more active threats against the network control structure. Key to the success of this network are name servers which relate the current location of a device to a network address, access controllers which curtail network membership and privileges, network monitors which report on the control structure and network behavior and, finally, super*clusterheads which are responsible for the distributed routing control. The super*clusterheads create hierarchical addresses for each PR and compute the best routes between clusters at each level. This paper discusses issues associated with clustering: membership definition, route creation, distribution and change.","PeriodicalId":375763,"journal":{"name":"MILCOM 1984 - IEEE Military Communications Conference","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1984-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125661521","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: 29
Risk Analysis and Satellite Communications Terminals 风险分析和卫星通信终端
MILCOM 1984 - IEEE Military Communications Conference Pub Date : 1984-10-01 DOI: 10.1109/MILCOM.1984.4794887
Raymond L. Fales
{"title":"Risk Analysis and Satellite Communications Terminals","authors":"Raymond L. Fales","doi":"10.1109/MILCOM.1984.4794887","DOIUrl":"https://doi.org/10.1109/MILCOM.1984.4794887","url":null,"abstract":"Satellite communications terminals' costs and schedules are driven by a variety of terminal and satellite risks. Understanding the impact of these risks on the terminals is necessary so risks can be planned for and mitigated. A methodology for analyzing these risks and categorizing them as Technical, Schedule, Estimation, and Financial Risks is established. These risks are qualitatively and quantitatively evaluated to determine detailed as well as overall program risks and to provide a statistically generated program cost range.","PeriodicalId":375763,"journal":{"name":"MILCOM 1984 - IEEE Military Communications Conference","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1984-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130808510","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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