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MILCOM 1982 - IEEE Military Communications Conference - Progress in Spread Spectrum Communications最新文献

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Design of Survivable Circuit-Switched Communication Networks 生存型电路交换通信网络的设计
MILCOM 1982 - IEEE Military Communications Conference - Progress in Spread Spectrum Communications Pub Date : 1982-10-01 DOI: 10.1109/MILCOM.1982.4805925
K. Natarajan, D. Walters, B. Maglaris
{"title":"Design of Survivable Circuit-Switched Communication Networks","authors":"K. Natarajan, D. Walters, B. Maglaris","doi":"10.1109/MILCOM.1982.4805925","DOIUrl":"https://doi.org/10.1109/MILCOM.1982.4805925","url":null,"abstract":"We address the problem of designing a circuit-switched network for voice communications operating in a military environment. The circuit-switched network design problem may be briefly stated as: given the topology, route tables and control discipline, end-to-end offered traffic and performance requirements, determine trunk group sizes such that the requirements are satisfied. One of the key requirements of a design is that the network be survivable, where survivability is based on different destruction scenario conditions. Our objective is to guarantee an acceptable level of performance for every node pair and under each of the different anticipated damage scenarios. The main contributions of our present work are the development of approaches for designing networks that simultaneously satisfy performance requirements for different destruction scenarios. We describe the architecture of a survivable, circuit-switched network. The key characteristics of the survivable network design problem are highlighted and differences with respect to classical trunk sizing problem are pointed out. An important aspect of our work is that the sizing is based on the logical topology of the network rather than its trunk group topology. One design approach, which we have used successfully, is presented in detail.","PeriodicalId":179832,"journal":{"name":"MILCOM 1982 - IEEE Military Communications Conference - Progress in Spread Spectrum Communications","volume":"30 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1982-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123587647","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
Finding Good Signalling Codes with Custom VLSI 用自定义VLSI找到好的信号编码
MILCOM 1982 - IEEE Military Communications Conference - Progress in Spread Spectrum Communications Pub Date : 1982-10-01 DOI: 10.1109/MILCOM.1982.4805921
M. Beeler
{"title":"Finding Good Signalling Codes with Custom VLSI","authors":"M. Beeler","doi":"10.1109/MILCOM.1982.4805921","DOIUrl":"https://doi.org/10.1109/MILCOM.1982.4805921","url":null,"abstract":"Digital communications on a shared, random access channel benefits from good codes to synchronize and to multiplex the data. Such codes have high autocorrelation and low crosscorrelation, respectively. Finding long binary sequences with these properties is difficult, and generally involves significant brute force searching. A custom computing engine performs such a search much faster than other approaches, and a custom VLSI chip is a practical means of constructing such an engine. The practical advantages and costs of this approach are discussed.","PeriodicalId":179832,"journal":{"name":"MILCOM 1982 - IEEE Military Communications Conference - Progress in Spread Spectrum Communications","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1982-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122697980","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
Digital Microwave Radio Program 数字微波广播节目
MILCOM 1982 - IEEE Military Communications Conference - Progress in Spread Spectrum Communications Pub Date : 1982-10-01 DOI: 10.1109/MILCOM.1982.4806025
J. Bartow
{"title":"Digital Microwave Radio Program","authors":"J. Bartow","doi":"10.1109/MILCOM.1982.4806025","DOIUrl":"https://doi.org/10.1109/MILCOM.1982.4806025","url":null,"abstract":"In 1981 CECOM placed four contracts for the exploratory development of ECCM techniques which are to be considered for use in a new digital microwave radio development. A spread spectrum modem is under development which will operate in the 4.4 to 5.0 GHz band. The modem will also be designed to operate, with minor changes, in the 14.4 to 15.35 GHz range. The modulation techniuqe selected is offset quadriphase shift keying. A hybrid direct sequence/frequency hopping system is being designed. The data rates at which the modems are expected to operate are related to various TRI-TAC and DCS multiplexers. Input data rates will vary from 72 kbps to 4.608 in the 4.4-5.0 GHz band and from 72 kbps to 18.720 Mbps in the 14.4-15.35 GHz band. The modulation and frequency translation schemes will be discussed. A steerable null antenna system will be designed for both RF bands and fabricated for C-band. The objective of this antenna is to discriminate against unwanted signals arriving in its side lobes and in the main beam. Among the requirements and constraints which will affect the antenna design are the need for duplex operation, the necessity for installation of the antenna on a 100 foot tactical mast, and the requirement to operate with high output power levels. A coding equipment development is underway which will result in the fabrication of an error correction technique to correct random errors and bursts of errors in the modem output.","PeriodicalId":179832,"journal":{"name":"MILCOM 1982 - IEEE Military Communications Conference - Progress in Spread Spectrum Communications","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1982-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117074477","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
Network Response Times of a Spread Spectrum System with Large Number of Network Terminals and Central Control 具有大量网络终端和中央控制的扩频系统的网络响应时间
MILCOM 1982 - IEEE Military Communications Conference - Progress in Spread Spectrum Communications Pub Date : 1982-10-01 DOI: 10.1109/MILCOM.1982.4805934
R. Lunayach, Sunir Kochhar
{"title":"Network Response Times of a Spread Spectrum System with Large Number of Network Terminals and Central Control","authors":"R. Lunayach, Sunir Kochhar","doi":"10.1109/MILCOM.1982.4805934","DOIUrl":"https://doi.org/10.1109/MILCOM.1982.4805934","url":null,"abstract":"In this paper performance of a spread spectrum system with a large number of network terminals and a small number of network control terminals is addressed. Network control terminals carry out most functions relating acquisitions, synchronization, control and aid network terminals. Network response times are calculated for various aiding stratagies and the conditions for a stable network operation are derived. Analytical results are verified with the help of simulations carried out using simulation language SLAM.","PeriodicalId":179832,"journal":{"name":"MILCOM 1982 - IEEE Military Communications Conference - Progress in Spread Spectrum Communications","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1982-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114822343","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
Regulatory Aspects of Spread Spectrum Communications 扩频通信的规管方面
MILCOM 1982 - IEEE Military Communications Conference - Progress in Spread Spectrum Communications Pub Date : 1982-10-01 DOI: 10.1109/MILCOM.1982.4805980
Michael D. Kennedy
{"title":"Regulatory Aspects of Spread Spectrum Communications","authors":"Michael D. Kennedy","doi":"10.1109/MILCOM.1982.4805980","DOIUrl":"https://doi.org/10.1109/MILCOM.1982.4805980","url":null,"abstract":"While it appears desirable to allow spread spectrum communications in the civilian environment, a number of questions must be answered before its introduction. How will the Commission authorize spread spectrum, with its large radio frequency bandwidth, in a spectrum that has largely been divided into many narrow bands? How can the Commission, with the aid of its licensees, monitor spread spectrum transmissions and enforce both technical and operational regulations? What will be the extent of interference between spread spectrum and narrow band-signals? It appears that these questions can be answered, and the problems they typify mitigated, by careful management on the part of the Commission.","PeriodicalId":179832,"journal":{"name":"MILCOM 1982 - IEEE Military Communications Conference - Progress in Spread Spectrum Communications","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1982-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128038948","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
Long Range MILSATCOM Architecture 远程军事卫星通信架构
MILCOM 1982 - IEEE Military Communications Conference - Progress in Spread Spectrum Communications Pub Date : 1982-10-01 DOI: 10.1109/MILCOM.1982.4806016
F. Bond
{"title":"Long Range MILSATCOM Architecture","authors":"F. Bond","doi":"10.1109/MILCOM.1982.4806016","DOIUrl":"https://doi.org/10.1109/MILCOM.1982.4806016","url":null,"abstract":"The current MILSATCOM assets are reviewed and assessed with regard to the ultimate military potential of the satellite transmission medium. Examples are presented showing why the future use of satellite communication will be impacted by geopolitical trends and re-directions in national policy. The key military issue is surviving and enduring communication over the entire spectrum of conflict levels and the need for a balanced defense against all possible threats. The importance of the network approach involving diverse transmission media is stressed. This in turn requires a more determined effort for achieving improved interoperability with the use of transmission standards. The proposed course for future MILSATCOM systems is based on: evolution toward higher frequencies, internetting of satellite and ground links, ability to reconfigure satcom assets, and more sophisticated access and network control. Also addressed is the suggested policy for exploiting the extensive commercial satcom facilities and the need for closer coordination with the organizations planning the future major terrestrial communication systems.","PeriodicalId":179832,"journal":{"name":"MILCOM 1982 - IEEE Military Communications Conference - Progress in Spread Spectrum Communications","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1982-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127712624","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
Frequency-Hopping Filters and Programmable Matched Filters for Spread-Spectrum Systems 扩频系统中的跳频滤波器和可编程匹配滤波器
MILCOM 1982 - IEEE Military Communications Conference - Progress in Spread Spectrum Communications Pub Date : 1982-10-01 DOI: 10.1109/MILCOM.1982.4805912
A. Budreau, R. T. Webster
{"title":"Frequency-Hopping Filters and Programmable Matched Filters for Spread-Spectrum Systems","authors":"A. Budreau, R. T. Webster","doi":"10.1109/MILCOM.1982.4805912","DOIUrl":"https://doi.org/10.1109/MILCOM.1982.4805912","url":null,"abstract":"The feasibility of using a surface acoustic wave device with switchable, closely spaced taps as a frequency hopping filter has been demonstrated. The test devices operate at 200-300 MHz for a Texas Instruments lithium niobate wire-bonded filter, (ref. 1) and 125-135 MHz for a United Technologies Research Center monolithic gallium arsenide (GaAs) device. (ref. 2) Future work is planned to develop GaAs monolithic versions at 0.5 and 1.0 GHz. These are, in fact, programmable transversal filters. They perform a variety of time domain functions such as matched filtering (asynchronous correlation), and they operate as variable frequency domain devices as well. In the latter mode, variable width passbands and notch rejection, as well as tunable bandpass, are achievable. Thus, adaptive operation in an electronic warfare scenario is a possible application. A planned use is in the Air Force's Integrated Communications, Navigation, Identification Avionics (ICNIA) program.","PeriodicalId":179832,"journal":{"name":"MILCOM 1982 - IEEE Military Communications Conference - Progress in Spread Spectrum Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1982-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130011707","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 New Adaptive Modem for Long Haul HF Digital Communications at Data Rates Greater than 1 bps/Hz 一种用于数据速率大于1bps /Hz的长距离高频数字通信的新型自适应调制解调器
MILCOM 1982 - IEEE Military Communications Conference - Progress in Spread Spectrum Communications Pub Date : 1982-10-01 DOI: 10.1109/MILCOM.1982.4805970
P. Anderson, F. Hsu, M. Sandler
{"title":"A New Adaptive Modem for Long Haul HF Digital Communications at Data Rates Greater than 1 bps/Hz","authors":"P. Anderson, F. Hsu, M. Sandler","doi":"10.1109/MILCOM.1982.4805970","DOIUrl":"https://doi.org/10.1109/MILCOM.1982.4805970","url":null,"abstract":"Reliable digital communication over long-haul HF circuits, at rates above 1 bps/Hz, is possible if an adaptive equalizer technique is used which will successfully follow the fading characteristics of the time-dispersive channel. This paper summarizes an investigation of this tracking problem which led to the selection of a square-root Kalman algorithm to update the coefficients of a decision feedback equalizer (DFE). The design and implementation of a new HF modem utilizing the Kalman DFE in conjunction with a continuous GO BACK N ARQ strategy is described. Results of performance tests at data rates from 2400 to 9600 bps using a 3 kHz real-time HF channel simulator are presented. Both low error rate and high throughput are achieved using the combined adaptive channel equalization and ARQ techniques. Preliminary results from tests over a long-haul live link are also reported.","PeriodicalId":179832,"journal":{"name":"MILCOM 1982 - IEEE Military Communications Conference - Progress in Spread Spectrum Communications","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1982-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131216257","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
Coding for BPSK SFH/SSMA Communications over Fading Channels 衰落信道下BPSK SFH/SSMA通信的编码
MILCOM 1982 - IEEE Military Communications Conference - Progress in Spread Spectrum Communications Pub Date : 1982-10-01 DOI: 10.1109/MILCOM.1982.4805984
E. Geraniotis
{"title":"Coding for BPSK SFH/SSMA Communications over Fading Channels","authors":"E. Geraniotis","doi":"10.1109/MILCOM.1982.4805984","DOIUrl":"https://doi.org/10.1109/MILCOM.1982.4805984","url":null,"abstract":"The preformance of asynchronous slow-frequency-hopped (SFH) spread-spectrum multiple-access (SSMA) communications over nonselective fading channels is examined. Binary phase-shift-keying (BPSK) modulation with coherent demodulation is employed. Bounds and approximations on the average bit error probability are first obtained for uncoded systems. Then the performance of various error-control coding schemes such as convolutional codes and Reed-Solomon codes with and without channel monitoring is compared. It is shown that error-control coding, in particular the use of Reed-Solomon codes, neutralizes channel fading and increases the multiple-access capability of SFH/SSMA systems.","PeriodicalId":179832,"journal":{"name":"MILCOM 1982 - IEEE Military Communications Conference - Progress in Spread Spectrum Communications","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1982-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116707061","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
AFSATCOM-Compatible 75 b/s Voice System afsatcom -兼容75b /s语音系统
MILCOM 1982 - IEEE Military Communications Conference - Progress in Spread Spectrum Communications Pub Date : 1982-10-01 DOI: 10.1109/MILCOM.1982.4805937
J. Handwerker
{"title":"AFSATCOM-Compatible 75 b/s Voice System","authors":"J. Handwerker","doi":"10.1109/MILCOM.1982.4805937","DOIUrl":"https://doi.org/10.1109/MILCOM.1982.4805937","url":null,"abstract":"An interactive, real-time Voice System can provide on-line, intelligible, synthetic speech over a 75 bits-per-second (b/s) teletype Air Force Satellite Communications (AFSATCOM) channel. This flexible, cost-effective system operates in both clear and secure AFSATCOM operational modes. The demonstration hardware and software are described along with background information on the AFSArCOM system. The conclusion is that adding voice response to existing hard-copy teletype output over a limited capacity channel is feasible without modifying AFSATCOM hardware or software. In addition, such a Voice System appears attractive for other applications where channel capacity restricts operation to low data rates only.","PeriodicalId":179832,"journal":{"name":"MILCOM 1982 - IEEE Military Communications Conference - Progress in Spread Spectrum Communications","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1982-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122364439","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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