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Proceedings of MILCOM '93 - IEEE Military Communications Conference最新文献

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Effects of imperfect power control on a CDMA system operating over a low Earth orbiting satellite link 低地球轨道卫星链路上运行的CDMA系统不完全功率控制的影响
Proceedings of MILCOM '93 - IEEE Military Communications Conference Pub Date : 1993-10-11 DOI: 10.1109/MILCOM.1993.408676
B. Vojcic, R. Pickholtz, L. Milstein
{"title":"Effects of imperfect power control on a CDMA system operating over a low Earth orbiting satellite link","authors":"B. Vojcic, R. Pickholtz, L. Milstein","doi":"10.1109/MILCOM.1993.408676","DOIUrl":"https://doi.org/10.1109/MILCOM.1993.408676","url":null,"abstract":"The analysis of both performance and capacity of direct sequence CDMA in terrestrial cellular systems has been addressed in the technical literature. It has been suggested that CDMA be used as a multiple access method for satellite systems as well, in particular for multi-spot beam Low Earth Orbit Satellites (LEOS). One is tempted to argue that since CDMA works well on terrestrial links, it will nominally work as well on satellite links. However, because there are fundamental differences in the characteristics of the two channels, such as larger time delays from the mobile to the base station and smaller multipath delay spreads on the satellite channels, the performance of CDMA on satellite links cannot always be predicted accurately from its performance on terrestrial channels. In this paper, the authors analytically derive the performance of a CDMA system which operates over a low Earth orbiting satellite channel. They incorporate such effects as imperfect power control and dual order diversity to obtain the average probability of error of a single user.<<ETX>>","PeriodicalId":323612,"journal":{"name":"Proceedings of MILCOM '93 - IEEE Military Communications Conference","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128324896","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
An adaptive correlator spread spectrum receiver using acoustic charge transport devices 一种利用声波电荷传输装置的自适应相关扩频接收机
Proceedings of MILCOM '93 - IEEE Military Communications Conference Pub Date : 1993-10-11 DOI: 10.1109/MILCOM.1993.408520
D. A. Gribble, C. Pateros, Gary J. Saulnier, P. Das
{"title":"An adaptive correlator spread spectrum receiver using acoustic charge transport devices","authors":"D. A. Gribble, C. Pateros, Gary J. Saulnier, P. Das","doi":"10.1109/MILCOM.1993.408520","DOIUrl":"https://doi.org/10.1109/MILCOM.1993.408520","url":null,"abstract":"An adaptive correlation receiver has been proposed for direct sequence spread spectrum receivers. This receiver integrates the function of data detection with narrowband interference suppression and multipath mitigation. While previous work describes the operation of the adaptive correlator and presents analytical and simulated performance results, the authors present an implementation of the receiver using acoustic charge transport (ACT) devices. The ACT device is a programmable transversal filter (PTF) and is used as a correlator whose taps can be adapted to optimize detection performance. The authors provide bit error rate performance data for channels consisting of additive white Gaussian noise (AWGN), AGWN with a tone jammer and AWGN with multipath.<<ETX>>","PeriodicalId":323612,"journal":{"name":"Proceedings of MILCOM '93 - IEEE Military Communications Conference","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133598301","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
Anti-jamming properties of a DS-CDMA equalization filter DS-CDMA均衡滤波器的抗干扰性能
Proceedings of MILCOM '93 - IEEE Military Communications Conference Pub Date : 1993-10-11 DOI: 10.1109/MILCOM.1993.408669
M. Davis, L. Milstein
{"title":"Anti-jamming properties of a DS-CDMA equalization filter","authors":"M. Davis, L. Milstein","doi":"10.1109/MILCOM.1993.408669","DOIUrl":"https://doi.org/10.1109/MILCOM.1993.408669","url":null,"abstract":"An adaptive tapped delay line equalizer is described which operates in a DS-CDMA receiver. This structure, without modification, can be applied to make the system insensitive to spectral inefficiency of the transmitted pulse shape (by rejecting multiple-access noise), to act as a RAKE in the presence of multipath interference, and to reject narrowband interference. The latter property is the main focus of this paper; this technique is compared to previously published methods of narrowband noise rejection.<<ETX>>","PeriodicalId":323612,"journal":{"name":"Proceedings of MILCOM '93 - IEEE Military Communications Conference","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116547800","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
Reduced complexity adaptive structures for jam-resistant satellite communications 抗干扰卫星通信的低复杂度自适应结构
Proceedings of MILCOM '93 - IEEE Military Communications Conference Pub Date : 1993-10-11 DOI: 10.1109/MILCOM.1993.408665
J. S. Goldstein, M. A. Ingram
{"title":"Reduced complexity adaptive structures for jam-resistant satellite communications","authors":"J. S. Goldstein, M. A. Ingram","doi":"10.1109/MILCOM.1993.408665","DOIUrl":"https://doi.org/10.1109/MILCOM.1993.408665","url":null,"abstract":"A linearly constrained wideband adaptive array sensor is described whose adaptive processor is realized with a two-dimensional orthogonal filter bank structure. It is demonstrated via simulation that the transform domain processor utilizing the computationally simple least mean square (LMS) algorithm is capable of convergence speeds which rival the more expensive to implement least squares methods. Furthermore, there is no additional cost in terms of the adaptive coefficient requirements (and only a modest increase in non-adaptive computational requirements) when compared to the standard tapped-delay-line (TDL) structure array utilizing the LMS algorithm. This performance increase provides a quicker approach to the optimal steady state solution, and is therefore more robust to a non-stationary environment than the corresponding TDL structure LMS processor. The flexibility of this new structure will permit both 'block' and 'sample' filter operations and is therefore proposed for the implementation of wavelet filters and generalized multirate filter banks. The results are equally valid for other array forms (such as unconstrained nonlinear arrays), for space-based Multiple Beam Antennas (MBAs) in satellite communications, and for other applications such as radar and sonar adaptive nulling.<<ETX>>","PeriodicalId":323612,"journal":{"name":"Proceedings of MILCOM '93 - IEEE Military Communications Conference","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130292310","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
Pseudonoise code acquisition time of a transponder with 1-bit analog-to-digital converter at front end 前端有1位模数转换器的转发器的伪噪声码采集时间
Proceedings of MILCOM '93 - IEEE Military Communications Conference Pub Date : 1993-10-11 DOI: 10.1109/MILCOM.1993.408709
H.M. Kwon
{"title":"Pseudonoise code acquisition time of a transponder with 1-bit analog-to-digital converter at front end","authors":"H.M. Kwon","doi":"10.1109/MILCOM.1993.408709","DOIUrl":"https://doi.org/10.1109/MILCOM.1993.408709","url":null,"abstract":"Many modern receivers employ intermediate-frequency (IF) sampling and a 1-b analog-to-digital (A/D) converter at the receiver front end for the pseudonoise (PN) spread spectrum communication systems. After the 1-bit A/D converter, the PN code synchronization, the carrier synchronization, and the bit synchronization are implemented digitally with the use of an application-specific integrated circuit. This paper computes the effects on the PN code acquisition time and bit error probability of the 1-bit A/D converter.<<ETX>>","PeriodicalId":323612,"journal":{"name":"Proceedings of MILCOM '93 - IEEE Military Communications Conference","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127985309","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
The use of C-band satellites for low cost, low data rate mobile applications 使用c波段卫星进行低成本、低数据速率的移动应用
Proceedings of MILCOM '93 - IEEE Military Communications Conference Pub Date : 1993-10-11 DOI: 10.1109/MILCOM.1993.408703
K. Gamache
{"title":"The use of C-band satellites for low cost, low data rate mobile applications","authors":"K. Gamache","doi":"10.1109/MILCOM.1993.408703","DOIUrl":"https://doi.org/10.1109/MILCOM.1993.408703","url":null,"abstract":"Based on experience in Desert Storm and other armed conflicts, the use of commercial SATCOM to support Department of Defense (DoD) communications is crucial to an operation's success. But, the use of commercial SATCOM to support low data rate (less than 64 Kbps) mobile or remote communication has been minimal, if nonexistent. Current commercial systems require large, narrow beam, antennas to prevent the interference inherent in the closely spaced commercial satellites (as little as 2/spl deg/ apart). This has limited these systems to large fixed site applications. This paper describes the use of simple signal processing techniques to support the use of broadbeam C-band antennas on small, low cost terminals. The proposed use of C-band systems with small broadbeam antennas opens up C-band satellites and technology to a whole new class of low data rate, mobile commercial and military applications not previously considered.<<ETX>>","PeriodicalId":323612,"journal":{"name":"Proceedings of MILCOM '93 - IEEE Military Communications Conference","volume":"73 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120976856","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
A next-generation tactical system architecture for tetherless communicators 用于无线通信的下一代战术系统架构
Proceedings of MILCOM '93 - IEEE Military Communications Conference Pub Date : 1993-10-11 DOI: 10.1109/MILCOM.1993.408671
R. Bollen, N.E. Heckman
{"title":"A next-generation tactical system architecture for tetherless communicators","authors":"R. Bollen, N.E. Heckman","doi":"10.1109/MILCOM.1993.408671","DOIUrl":"https://doi.org/10.1109/MILCOM.1993.408671","url":null,"abstract":"The authors propose a tactical system architecture for the 21st century that will give tetherless communications to all users, with access to a switched network implemented in a satellite constellation. Early in the next century, when today's tactical mobile communications systems are outmoded, an all-wireless access system such as this will be feasible. Lessons learned in Desert Storm tell that mobility of communications is of the utmost importance to a fighting force; network access in this new architecture will be via a variety of personal mobile and portable terminals that extend complete mobility to all users. A terrestrial backbone network using many vehicles, LOS links, and much (frequency) planning will no longer be needed; the architecture discussed is a Land Mobile Satellite (LMS) system. Feasibility of such a tactical system architecture is argued and some promising technology options available to system architects and designers are identified.<<ETX>>","PeriodicalId":323612,"journal":{"name":"Proceedings of MILCOM '93 - IEEE Military Communications Conference","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121169298","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
A simulation testbed for LPD networks with power control 具有功率控制的LPD网络仿真试验台
Proceedings of MILCOM '93 - IEEE Military Communications Conference Pub Date : 1993-10-11 DOI: 10.1109/MILCOM.1993.408599
J. E. Baker, I. Shahnawaz, A. Sastry
{"title":"A simulation testbed for LPD networks with power control","authors":"J. E. Baker, I. Shahnawaz, A. Sastry","doi":"10.1109/MILCOM.1993.408599","DOIUrl":"https://doi.org/10.1109/MILCOM.1993.408599","url":null,"abstract":"There is a growing interest in low probability of detection (LPD) communication networks due to increased focus on tactical networks, and due to improved processing capabilities for spread spectrum waveforms. The probability of detection by an interceptor is affected by design decisions made throughout the hardware and protocol levels of the communication system. Because of the difficulty of analytically modeling the effects and interactions of system design choices made at different levels of the system upon the probability of detection, particularly in the networking context, the authors have developed a combined simulation and analytical model of a network of mobile communicating nodes operating in the presence of jammers and hostile communication interceptors such as power radiometers. They use the model to examine the efficacy of dynamic power control in LPD networks.<<ETX>>","PeriodicalId":323612,"journal":{"name":"Proceedings of MILCOM '93 - IEEE Military Communications Conference","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124114681","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
Performance bounds for DS/SSMA systems with binary noncoherent signaling schemes 具有二进制非相干信令方案的DS/SSMA系统的性能边界
Proceedings of MILCOM '93 - IEEE Military Communications Conference Pub Date : 1993-10-11 DOI: 10.1109/MILCOM.1993.408518
F. Ozluturk, S. Tantaratana, A. W. Lam
{"title":"Performance bounds for DS/SSMA systems with binary noncoherent signaling schemes","authors":"F. Ozluturk, S. Tantaratana, A. W. Lam","doi":"10.1109/MILCOM.1993.408518","DOIUrl":"https://doi.org/10.1109/MILCOM.1993.408518","url":null,"abstract":"The authors investigate the performance of direct-sequence spread-spectrum (DS/SSMA) communications systems with binary noncoherent signaling schemes, using complex signature sequences. Upper and lower bounds on the probability of bit error (p.b.e.) are obtained for differential-phase-shift-keyed (DPSK) signaling with differentially coherent demodulation and frequency-shift-keyed (FSK) signaling with noncoherent demodulation. The probability density function (p.d.f.) of the multiple user interference (MUI) is obtained for deterministic complex signature sequences. Upper and lower bounds are obtained by utilizing appropriate shifting procedures on the p.d.f. Numerical results are presented for some complex signature sequences, as well as binary sequences, with binary DPSK and FSK data modulations. Results show that complex sequences have good performances in noncoherent signaling schemes.<<ETX>>","PeriodicalId":323612,"journal":{"name":"Proceedings of MILCOM '93 - IEEE Military Communications Conference","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115494474","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
Simulation of multimedia traffic on FDDI 基于FDDI的多媒体流量仿真
Proceedings of MILCOM '93 - IEEE Military Communications Conference Pub Date : 1993-10-11 DOI: 10.1109/MILCOM.1993.408686
D. Morrissey, G. Keiser, E.A. Henandez
{"title":"Simulation of multimedia traffic on FDDI","authors":"D. Morrissey, G. Keiser, E.A. Henandez","doi":"10.1109/MILCOM.1993.408686","DOIUrl":"https://doi.org/10.1109/MILCOM.1993.408686","url":null,"abstract":"The Fiber Distributed Data Interface (FDDI) is an American National Standards Institute (ANSI) standard for a 100-Mb/s fiber optic token-ring local area network (LAN). It provides synchronous and asynchronous service with a guaranteed bandwidth and response time. Frame transmission is controlled through a token rotation protocol, and stations are allowed to transmit for a predetermined amount of time only if they meet specific timing and priority requirements. The purpose of this paper is to investigate the performance of an FDDI network in which synchronous digitized voice and video signals are transmitted on the same network with asynchronous data under varying network loads.<<ETX>>","PeriodicalId":323612,"journal":{"name":"Proceedings of MILCOM '93 - IEEE Military Communications Conference","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116015677","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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