MILCOM 2008 - 2008 IEEE Military Communications Conference最新文献_第3页

An enhanced V-BLAST with non-stationary interference avoidance capability 增强型V-BLAST，具有非静止干扰避免能力

MILCOM 2008 - 2008 IEEE Military Communications Conference Pub Date : 2008-11-01 DOI: 10.1109/MILCOM.2008.4753255

Younghoon Jo, Dapeng Oliver Wu

{"title":"An enhanced V-BLAST with non-stationary interference avoidance capability","authors":"Younghoon Jo, Dapeng Oliver Wu","doi":"10.1109/MILCOM.2008.4753255","DOIUrl":"https://doi.org/10.1109/MILCOM.2008.4753255","url":null,"abstract":"Reliable communication under interferences is desired by both military and commercial parties. This paper proposes a vertical-Bell Laboratories Layered Space-Time (V-BLAST) architecture with non-stationary interference avoidance capability. A transform domain processing (TDP) and minimum mean square error (MMSE) detector are combined with the V-BLAST to enhance performance in a narrow band interference (NBI) environment. A key idea of TDP is to generate an adaptive modulated information-bearing signal avoiding spectrally crowded regions in the transform domain at both transmitters and receivers of the V-BLAST system. The adaptive interference-free signal is synthesized by a non-parametric spectral estimator, called Caponpsilas method (CM). The proposed V-BLAST system also incorporates the MMSE detector. These approaches offer better bit error performance than other interference mitigation methodologies that process signals at the receiver only, and better than other similar systems that use a parametric spectral estimator with zero-forcing detector. Our simulation results indicate that the proposed system mitigates not only stationary interferences but also non-stationary interferences. Therefore, the proposed system is a viable option for the highly reliable multiple-input multiple-output (MIMO) system.","PeriodicalId":434891,"journal":{"name":"MILCOM 2008 - 2008 IEEE Military Communications Conference","volume":"88 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127043273","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

Distributed feature-based modulation classification using wireless sensor networks 基于无线传感器网络的分布式特征调制分类

MILCOM 2008 - 2008 IEEE Military Communications Conference Pub Date : 2008-11-01 DOI: 10.1109/MILCOM.2008.4753252

P. Forero, A. Cano, G. Giannakis

引用次数: 38

Waveform and RF power amplifier interdependencies in battery-powered tactical radio applications 电池供电战术无线电应用中波形和射频功率放大器的相互依赖性

MILCOM 2008 - 2008 IEEE Military Communications Conference Pub Date : 2008-11-01 DOI: 10.1109/MILCOM.2008.4753062

John W. Nieto, Richard Buckley, William Furman

引用次数: 2

Strategies for time-based multi-path secure information disseminations in MANETs 基于时间的多路径manet安全信息传播策略

MILCOM 2008 - 2008 IEEE Military Communications Conference Pub Date : 2008-11-01 DOI: 10.1109/MILCOM.2008.4753400

X. Hong, Bo Gu, Qunwei Zheng

{"title":"Strategies for time-based multi-path secure information disseminations in MANETs","authors":"X. Hong, Bo Gu, Qunwei Zheng","doi":"10.1109/MILCOM.2008.4753400","DOIUrl":"https://doi.org/10.1109/MILCOM.2008.4753400","url":null,"abstract":"Sending messages securely to protect confidentiality in mobile ad hoc networks is a challenging issue due to the open wireless media, the spacial constraints and the difficulty in establishing strict security mechanisms. To tackle the problem, we have presented a scheme where a source node sends shares of a message at different times. Due to node mobility, the shares will be routed through different intermediate nodes. It is highly unlikely that a particular intermediate node (an eavesdropper) is able to be on (or around) many of these routes and collect enough shares to reconstruct the original message. The scheme is particular suitable for applications that can tolerate long message delays, as those studied in delay tolerant networks. The paper focuses on analyzing the strategies that a node can use in determining the intervals between two shares, and in tuning to applicationspsila requirements on delay bounds. The results provide a guideline for the configuration and the security of the scheme. We further investigate the influence from various mobility models on the security property. The results show big differences among the models and the practical aspect of the scheme. In all, our proposed scheme provides a valuable alternative for delay tolerant applications to enhance message confidentiality.","PeriodicalId":434891,"journal":{"name":"MILCOM 2008 - 2008 IEEE Military Communications Conference","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122313776","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

Demodulation performance for MUOS user-to-base downlink receiver MUOS用户对基下行接收机的解调性能

MILCOM 2008 - 2008 IEEE Military Communications Conference Pub Date : 2008-11-01 DOI: 10.1109/MILCOM.2008.4753473

A. P. Helwig

引用次数: 4

Markovian approach to model Underwater Acoustic channel: Techniques comparison 水声信道建模的马尔可夫方法:技术比较

MILCOM 2008 - 2008 IEEE Military Communications Conference Pub Date : 2008-11-01 DOI: 10.1109/MILCOM.2008.4753161

F. Pignieri, F. Rango, F. Veltri, S. Marano

{"title":"Markovian approach to model Underwater Acoustic channel: Techniques comparison","authors":"F. Pignieri, F. Rango, F. Veltri, S. Marano","doi":"10.1109/MILCOM.2008.4753161","DOIUrl":"https://doi.org/10.1109/MILCOM.2008.4753161","url":null,"abstract":"In the last years, Underwater Acoustic (UWA) sensor networks have exponentially grown in many scientific, industrial and research areas. Wireless underwater communications are required in many application fields, such as real time remote control of seabed and oil rigs, monitoring of underwater environments, collecting of scientific data recorded by stations on the seabed, conversation between divers, mapping of the seabed (in order either to detect objects or to discover new resources), prevention of disasters, and many others. In order to allow these applications, the aspect of physical phenomena affecting acoustic communications cannot be neglected. The shallow-water acoustic channel is different from the radio channels in many aspects. The available bandwidth of the UWA channel is limited and it depends on both range and frequency. Within this limited bandwidth, the acoustic signals are affected by time-varying multipath, which may create severe inter symbol interference (ISI) and large Doppler shifts and spreads. These characteristics restrict the range and bandwidth for the reliable communications. Many works have already treated underwater acoustic channel modeling problem, however, at the best of our knowledge, they work only at the bit level and they are not suitable for those contexts in which a high level model is required. For this purpose, our paper discusses about a high level channel model based on Markov Chain approach for the underwater environment. Finite State Markov Model is developed for Packet Error Rate (PER) evaluation in an underwater channel, using the concept of error trace analysis. Some high level models well known in literature are compared to obtain statistical evaluations in order to find the model best fitting the underwater channel dynamics. Simulation and analysis are made in Matlab.","PeriodicalId":434891,"journal":{"name":"MILCOM 2008 - 2008 IEEE Military Communications Conference","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122964935","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: 40

Evaluation of frequency offset and Doppler effect in terrestrial RF and in underwater acoustic OFDM systems 地面射频和水声OFDM系统中频偏和多普勒效应的评估

MILCOM 2008 - 2008 IEEE Military Communications Conference Pub Date : 2008-11-01 DOI: 10.1109/MILCOM.2008.4753547

S. Ahmed, H. Arslan

引用次数: 13

Demonstration of synchronization method for frequency hopping ad hoc network 跳频自组网同步方法的演示

MILCOM 2008 - 2008 IEEE Military Communications Conference Pub Date : 2008-11-01 DOI: 10.1109/MILCOM.2008.4753304

Juha Huovinen, T. Vanninen, J. Iinatti

{"title":"Demonstration of synchronization method for frequency hopping ad hoc network","authors":"Juha Huovinen, T. Vanninen, J. Iinatti","doi":"10.1109/MILCOM.2008.4753304","DOIUrl":"https://doi.org/10.1109/MILCOM.2008.4753304","url":null,"abstract":"Anti-jamming capability and protection against interception are key priorities in wireless mobile ad hoc networks (MANETs) or sensor networks for military applications. These features are supported by spread spectrum (SS) techniques such as frequency hopping (FH). In an FH ad hoc network, the phase of hopping sequence, i.e., FH-code phase is typically derived from the local clock reading of each node. Therefore, network-wide time synchronization is needed in order to get the nodes to simultaneously switch to the same frequency channel, i.e., hop synchronously. In this paper, a rarely issued distributed FH-code phase synchronization method for an FH MANET is implemented and demonstrated on wireless open-access research platforms (WARPs). In the earlier studies the considered method has been investigated to be military compliant in the anti-jamming and low probability of detection -sense. Herein, the measurements are reported for static scenarios of two and three nodes. Sufficient time synchronization is managed to be preserved for the frequency hopping operations in the presence of the measured clock drifts. Furthermore, it is shown that the system is able to maintain the FH-code phase synchronization as long as the clock errors are less than half the dwell time.","PeriodicalId":434891,"journal":{"name":"MILCOM 2008 - 2008 IEEE Military Communications Conference","volume":"138 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114488104","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 mediation service for Web Services provision in tactical disadvatnaged environment 用于在战术不利环境中提供Web服务的中介服务

MILCOM 2008 - 2008 IEEE Military Communications Conference Pub Date : 2008-11-01 DOI: 10.1109/MILCOM.2008.4753323

J. Sliwa, M. Amanowicz

引用次数: 11

Power control in random access ad hoc networks 随机接入自组织网络中的功率控制

MILCOM 2008 - 2008 IEEE Military Communications Conference Pub Date : 2008-11-01 DOI: 10.1109/MILCOM.2008.4753394

F. J. Block

{"title":"Power control in random access ad hoc networks","authors":"F. J. Block","doi":"10.1109/MILCOM.2008.4753394","DOIUrl":"https://doi.org/10.1109/MILCOM.2008.4753394","url":null,"abstract":"It has been shown that throughput in wireless networks is enhanced by using scheduled transmissions, low transmitter power, and multiple short hops to relay a packet from its source to its destination. There remain several difficulties with this approach. For example, relaying over many hops can cause large packet delays. The routing and slot assignment protocols can also incur a large overhead penalty. Thus, in many cases, it may be necessary to forego this approach and have nodes transmit directly to their intended receivers using random access techniques. If random channel access is used, a receiver may experience interference from packets intended for other radios. Interference can be limited by having nodes reduce their power to their intended destinations. However, without multi-hop routing, the possibility of a receiver experiencing very strong interference remains because it is likely that some transmitters may not be able to reduce their power levels substantially. Any gains achieved by lowering power levels to reduce interference may be countered by the loss of extra link margin that can protect against interference. Also, because frequency hopping (FH) is relatively immune to the near/far problem, it is not clear that a power control strategy which works well for FH systems would also work well for non-hopping networks. In this paper, the throughput attainable from several deterministic and random power control strategies will be considered for non-hopping and frequency-hop random access networks using a power-based capture model for reception.","PeriodicalId":434891,"journal":{"name":"MILCOM 2008 - 2008 IEEE Military Communications Conference","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122024593","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