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

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Non-coherent PN code acquisition in direct sequence spread spectrum systems using a neural network 基于神经网络的直接序列扩频系统非相干PN码采集
Proceedings of MILCOM '93 - IEEE Military Communications Conference Pub Date : 1993-10-11 DOI: 10.1109/MILCOM.1993.408551
M. Thompson, S. Dianat
{"title":"Non-coherent PN code acquisition in direct sequence spread spectrum systems using a neural network","authors":"M. Thompson, S. Dianat","doi":"10.1109/MILCOM.1993.408551","DOIUrl":"https://doi.org/10.1109/MILCOM.1993.408551","url":null,"abstract":"An artificial neural network is described which performs parallel matched filtering of a received direct sequence spread spectrum (DSSS) signal corrupted with noise with a locally generated but time offset version of the received sequence. The network provides the complete cross-correlation of the local sequence and the received signal. The network structure and design procedure are described. Its performance in additive white Gaussian noise (AWGN) is evaluated and shown to compare very well with the theoretical performance of matched filter receivers. The purpose of the DSSS receiver is to despread the received signal and to remove the information content from the despread signal.<<ETX>>","PeriodicalId":323612,"journal":{"name":"Proceedings of MILCOM '93 - IEEE Military Communications Conference","volume":"8 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":"126834858","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: 5
A new fast Reed-Solomon decoding algorithm without Chien search 一种新的快速Reed-Solomon解码算法
Proceedings of MILCOM '93 - IEEE Military Communications Conference Pub Date : 1993-10-11 DOI: 10.1109/MILCOM.1993.408681
D. Chi
{"title":"A new fast Reed-Solomon decoding algorithm without Chien search","authors":"D. Chi","doi":"10.1109/MILCOM.1993.408681","DOIUrl":"https://doi.org/10.1109/MILCOM.1993.408681","url":null,"abstract":"This paper presents a novel Reed-Solomon (RS) decoding algorithm based on finite fields with an infinite element. The Chien Search procedure included in all existing general RS decoding algorithms can be totally eliminated in this new method. Hence it can reduce the decode time significantly. Comparisons with other RS decoding methods and hardware structure of this new algorithm are also discussed.<<ETX>>","PeriodicalId":323612,"journal":{"name":"Proceedings of MILCOM '93 - IEEE Military Communications Conference","volume":"19 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":"124405307","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
Meteor burst system design using an advanced computer-based prediction model 流星暴击系统设计采用了先进的基于计算机的预测模型
Proceedings of MILCOM '93 - IEEE Military Communications Conference Pub Date : 1993-10-11 DOI: 10.1109/MILCOM.1993.408638
R. S. Mawrey, J. Larsen, J. Weitzen
{"title":"Meteor burst system design using an advanced computer-based prediction model","authors":"R. S. Mawrey, J. Larsen, J. Weitzen","doi":"10.1109/MILCOM.1993.408638","DOIUrl":"https://doi.org/10.1109/MILCOM.1993.408638","url":null,"abstract":"The authors present an overview of the features of an advanced computer-based meteor burst prediction model used to design meteor burst communication systems. A unique graphical tools developed to aid in the design of meteor burst communication systems is described and the use of this tool in the design of meteor burst systems is illustrated.<<ETX>>","PeriodicalId":323612,"journal":{"name":"Proceedings of MILCOM '93 - IEEE Military Communications Conference","volume":"16 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":"128002025","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
An adaptive algorithm for computing network s-t reliability with node failures 考虑节点故障的网络s-t可靠性计算自适应算法
Proceedings of MILCOM '93 - IEEE Military Communications Conference Pub Date : 1993-10-11 DOI: 10.1109/MILCOM.1993.408688
L. Wong, L. Miller, J. Lee
{"title":"An adaptive algorithm for computing network s-t reliability with node failures","authors":"L. Wong, L. Miller, J. Lee","doi":"10.1109/MILCOM.1993.408688","DOIUrl":"https://doi.org/10.1109/MILCOM.1993.408688","url":null,"abstract":"The survivability of tactical communication networks that are subject to node and link failures can be rated in terms of calculations of network s-t reliability, the probability that a connection exists between a particular pair of nodes (s,t), or the average of such probabilities over the possible pairs of nodes. For networks of realistic size (30 or more nodes), it is well known that the NP nature of the calculations can result in excessive computational times, due to the very large number of combinations of node and link failures. In this paper, a new method for obtaining a fast calculation of this reliability is presented. The method uses the concept of a threshold on link reliability to develop bounds on the s-t reliability, in effect truncating the \"Reduction & Partition\" algorithm of Deo and Medidi (1992) in order to control the time required for the calculation; that algorithm is capable of handling not only imperfect links (subject to noise and jamming) but also imperfect nodes (subject to physical attack). It is shown that a link reliability can achieve a reasonable tradeoff between bound tightness and the speed of the calculation. Example calculations are given for a tactical area coverage communications network involving 34 nodes.<<ETX>>","PeriodicalId":323612,"journal":{"name":"Proceedings of MILCOM '93 - IEEE Military Communications Conference","volume":"10 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":"129128608","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
Maximum-likelihood diversity combining in partial-band noise interference channel 部分带噪声干扰信道中的最大似然分集组合
Proceedings of MILCOM '93 - IEEE Military Communications Conference Pub Date : 1993-10-11 DOI: 10.1109/MILCOM.1993.408616
G. Li, Qiang Wang, V. Bhargava, L. Mason
{"title":"Maximum-likelihood diversity combining in partial-band noise interference channel","authors":"G. Li, Qiang Wang, V. Bhargava, L. Mason","doi":"10.1109/MILCOM.1993.408616","DOIUrl":"https://doi.org/10.1109/MILCOM.1993.408616","url":null,"abstract":"Maximum-likelihood diversity combining for an FFH/MFSK spread spectrum system on a partial-band noise (PBN) interference channel is investigated. The structure of maximum-likelihood diversity reception on a PBN channel with additive white Gaussian noise (AWGN) is derived. It is shown that signal-to-noise ratio and the noise variance at each hop have to be known to implement this optimum diversity combining. The performance of the maximum-likelihood combining can be used as a standard in judging the performance of other suboptimum, but more practical diversity combining schemes. The performance of the optimum combining scheme is evaluated. It is shown that the performance difference between some of the known diversity combining schemes, which do not require channel information to operate, and the optimum scheme is not small when the diversity order is low.<<ETX>>","PeriodicalId":323612,"journal":{"name":"Proceedings of MILCOM '93 - IEEE Military Communications Conference","volume":"21 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":"131416912","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
Channel sounder testing for tactical communications 战术通信信道测深仪测试
Proceedings of MILCOM '93 - IEEE Military Communications Conference Pub Date : 1993-10-11 DOI: 10.1109/MILCOM.1993.408643
R. Rood, F. Morehouse
{"title":"Channel sounder testing for tactical communications","authors":"R. Rood, F. Morehouse","doi":"10.1109/MILCOM.1993.408643","DOIUrl":"https://doi.org/10.1109/MILCOM.1993.408643","url":null,"abstract":"The characterization of wideband radio channels requires knowledge of such parameters as the average delay, the delay spread, and their coherence bandwidth. These are also descriptors that provide relevant information to system design engineers. Channel sounding is a technique for developing this information for a specific communication's path and frequency range. The GTE Laboratories sounder is a computer-controlled, mobile, channel probe that uses a sliding correlator architecture to measure transmission loss and delay spread. The transmitter sends out a pseudorandom waveform with a predetermined chip interval and code word length. It is these two parameters that determine the minimum time resolution and maximum delay spread that is measurable. At the receiver, a replica of the transmitted pseudorandom waveform is correlated with the in-phase and quadrature-phase components of the received signal. The output of the correlator is integrated and sampled. This process is conducted for each chip in the pseudorandom code period in order to obtain a valid measurement of the entire delay-spread function. It is this delay spread that is one of the key parameters used to characterize channel performance, as it has the most significant effect on the channel error rate.<<ETX>>","PeriodicalId":323612,"journal":{"name":"Proceedings of MILCOM '93 - IEEE Military Communications Conference","volume":"89 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131623589","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
MLSE of shaped BPSK in bandlimited nonlinear channels 带限非线性信道中形状BPSK的多模态分析
Proceedings of MILCOM '93 - IEEE Military Communications Conference Pub Date : 1993-10-11 DOI: 10.1109/MILCOM.1993.408626
R. Ziemer, R. Turcotte
{"title":"MLSE of shaped BPSK in bandlimited nonlinear channels","authors":"R. Ziemer, R. Turcotte","doi":"10.1109/MILCOM.1993.408626","DOIUrl":"https://doi.org/10.1109/MILCOM.1993.408626","url":null,"abstract":"The application of the Viterbi algorithm (VA) to perform maximum-likelihood sequence estimation (MLSE) of shaped biphase-shift keyed (SBPSK) modulation is presented, and its performance characterized in channels typical of UHF military satellite communications by computer simulation. The channel models utilized consist of five-pole Chebyshev and 16 two-pole cascaded Butterworth filters followed, in some cases, by a nonlinear model for a traveling-wave tube (TWT) amplifier proposed by A. A. M. Saleh (1981). The VA detector is compared with integrate-and-dump (I&D) detection and a simplified metric calculation for the VA. The results show that even in severely bandlimited channels with the nonlinearity, VA detection gives improved performance. Without the nonlinearity, VA detection provides an E/sub b//N/sub o/ gain over I&D detection from two to three dB, depending on the amount of bandlimiting.<<ETX>>","PeriodicalId":323612,"journal":{"name":"Proceedings of MILCOM '93 - IEEE Military Communications Conference","volume":"11 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":"131684378","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
On the use of INTELSAT and INMARSAT to support DoD communications requirements 关于使用国际通信卫星组织和国际海事卫星组织来支持国防部的通信需求
Proceedings of MILCOM '93 - IEEE Military Communications Conference Pub Date : 1993-10-11 DOI: 10.1109/MILCOM.1993.408555
G. Comparetto
{"title":"On the use of INTELSAT and INMARSAT to support DoD communications requirements","authors":"G. Comparetto","doi":"10.1109/MILCOM.1993.408555","DOIUrl":"https://doi.org/10.1109/MILCOM.1993.408555","url":null,"abstract":"Non-DoD satellite communications (SATCOM) resources (i.e., commercial SATCOM and international SATCOM) are an important asset that is increasingly being used to augment, supplement, or back up military satellite communications (MILSATCOM) systems in support of DoD communications and data-transfer requirements. Several reasons exist for this. The authors study the INTELSAT and INMARSAT satellite systems, which fall into the international category of non-DoD SATCOM systems, in terms of their applicability to support DoD communications and data-transfer applications and to identify any restrictions that may exist which would limit their use. A brief overview is presented of each system with an emphasis on the current space and ground segments. This is followed by a discussion of the covenant agreements of each system with an emphasis on possible restrictions and/or limitations to their use for DoD purposes.<<ETX>>","PeriodicalId":323612,"journal":{"name":"Proceedings of MILCOM '93 - IEEE Military Communications Conference","volume":"33 7-8 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":"131841926","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
Range extension via surrogate satellite 通过代理卫星扩展射程
Proceedings of MILCOM '93 - IEEE Military Communications Conference Pub Date : 1993-10-11 DOI: 10.1109/MILCOM.1993.408528
M. Macuch
{"title":"Range extension via surrogate satellite","authors":"M. Macuch","doi":"10.1109/MILCOM.1993.408528","DOIUrl":"https://doi.org/10.1109/MILCOM.1993.408528","url":null,"abstract":"The author develops this paper to initiate actions through the concept based requirements system (CBRS) which are intended to lead to the ultimate fielding of a critically needed capability for signal support of Airland Operations concepts. It is based on considerations of ongoing basic research and development as well as technological developments and forecasts in a number of disciplines that, judiciously guided, managed, and funded, can culminate in a cost effective and timely resolution of specific Airland Operations signal support deficiencies. This applies equally to follow-on concepts. In addition to signal support utilization, this technology initiative points out important applications to other Army and sister service functional areas.<<ETX>>","PeriodicalId":323612,"journal":{"name":"Proceedings of MILCOM '93 - IEEE Military Communications Conference","volume":"1 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":"132238198","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
Interconnection of LANs in an open systems environment 开放系统环境下的局域网互连
Proceedings of MILCOM '93 - IEEE Military Communications Conference Pub Date : 1993-10-11 DOI: 10.1109/MILCOM.1993.408692
K. Y. Jo, R. J. Colver
{"title":"Interconnection of LANs in an open systems environment","authors":"K. Y. Jo, R. J. Colver","doi":"10.1109/MILCOM.1993.408692","DOIUrl":"https://doi.org/10.1109/MILCOM.1993.408692","url":null,"abstract":"This paper studies two methods of interconnecting heterogeneous local area networks (LANs) such as Carrier-Sense Multiple-Access (CSMA) and token ring networks in an open systems environment, and evaluates the associated system performance. The first interconnecting method is to link the two LANs through gateways; the second is to use an architecture in which some stations on the ring LAN are also linked to the CSMA LAN via a multiplexer. Through such interconnected LANs, the Department of Defense end users can process data and applications seamlessly in an open systems environment. It has been shown that the second method (a type of dual interface) gives better performance in minimizing the response time and token rotation time, causing less traffic congestion. By allowing routing at the stations on the ring, the comparison becomes rather arbitrary. An optimal traffic routing ratio is determined for the second interconnection method. Moreover, a threshold routing ratio, beyond which the first interconnection is superior in performance, is computed.<<ETX>>","PeriodicalId":323612,"journal":{"name":"Proceedings of MILCOM '93 - IEEE Military Communications Conference","volume":"20 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":"134276453","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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