MILCOM 2013 - 2013 IEEE Military Communications Conference最新文献_第8页

Towards True Semantic Networks 走向真正的语义网络

MILCOM 2013 - 2013 IEEE Military Communications Conference Pub Date : 2013-11-01 DOI: 10.1109/MILCOM.2013.124

R. Saracco

引用次数: 0

Modulation Classification in MIMO Systems MIMO系统中的调制分类

MILCOM 2013 - 2013 IEEE Military Communications Conference Pub Date : 2013-11-01 DOI: 10.1109/MILCOM.2013.15

E. Kanterakis, W. Su

引用次数: 22

Spectrum Coexistence Issues: Challenges and Research Directions 频谱共存问题:挑战与研究方向

MILCOM 2013 - 2013 IEEE Military Communications Conference Pub Date : 2013-11-01 DOI: 10.1109/MILCOM.2013.285

S. Dehnie, V. Chakravarthy, Zhiqiang Wu, Chittabrata Ghosh, Husheng Li

{"title":"Spectrum Coexistence Issues: Challenges and Research Directions","authors":"S. Dehnie, V. Chakravarthy, Zhiqiang Wu, Chittabrata Ghosh, Husheng Li","doi":"10.1109/MILCOM.2013.285","DOIUrl":"https://doi.org/10.1109/MILCOM.2013.285","url":null,"abstract":"Spectrum congestion is a problem to both commercial and military systems. A recent Presidential Council of Advisors on Science and Technology (PCAST) study suggests that this problem is further amplified for military systems because not only demand for more bandwidth is increasing but portion of the spectrum primarily allocated to the military is recommended for commercial use. PCAST report also suggests that spectrum congestion is mainly due to inefficient use of spectrum rather than spectrum scarcity. This paper deals with challenges evolving due to coexistence of various commercial and military communications systems in wideband non-contiguous spectrum. A non-contiguous spectrum environment is characterized by spectrum holes fragmented across frequency range of interest. %This paper, in particular, focuses on different types of interference which will affect the quality of a spectrum hole and its utility for spectrum sharing application. In particular, we discuss the impact of spectrum sharing from the system perspective including hardware design, physical (PHY) layer intricacies, and medium access control (MAC) layer spectrum management. Since the number of spectrum holes required is application dependent, non-contiguous waveform design and pertinent design modifications and MAC layer improvements are also an intrinsic part of this paper.","PeriodicalId":379382,"journal":{"name":"MILCOM 2013 - 2013 IEEE Military Communications Conference","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126531923","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

High-Speed Turbo Equalization for GPP-Based Software Defined Radios 基于gpp的软件无线电高速Turbo均衡

MILCOM 2013 - 2013 IEEE Military Communications Conference Pub Date : 2013-11-01 DOI: 10.1109/MILCOM.2013.270

M. Schwall, F. Jondral

{"title":"High-Speed Turbo Equalization for GPP-Based Software Defined Radios","authors":"M. Schwall, F. Jondral","doi":"10.1109/MILCOM.2013.270","DOIUrl":"https://doi.org/10.1109/MILCOM.2013.270","url":null,"abstract":"High data rate waveforms for software defined radios (SDR) have to cope with frequency selective fading due to the mobile use in different harsh transmission environments. The received signal needs to be equalized in order to restore the transmitted information. Turbo equalization is a promising approach to deal with the inter-symbol interference occurring at the receiver. The iterative exchange of soft information between the equalizer and the decoder improves the decision reliability and hence reduces the bit error probability compared to conventional receivers. However, the necessary resource-demanding soft-input soft-output algorithms require a high processing performance to ensure real-time capability. In this paper, we will present a high-speed implementation of a turbo equalizer for SDRs with digital signal processing being performed on general purpose processors (GPP). The implementation will utilize linear MMSE filtering and suboptimal algorithms like overlapping sub-trellis MAX-Log-MAP decoding, approximations of mathematical operations, parallelization methods such as threading-based pipelining, and processor specific optimizations like single instruction multiple data (SIMD) commands. We will present the processing gains for each optimization level, highlight the performance loss for the suboptimal modifications and analyze the latency introduced by the pipelined processing. So far, transmissions with data rates up to 5.4 Mbit/s can be decoded in real-time with negligible performance loss and tolerable delay.","PeriodicalId":379382,"journal":{"name":"MILCOM 2013 - 2013 IEEE Military Communications Conference","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121445473","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

Joint Sidelobe Suppression and PAPR Reduction in OFDM Using Partial Transmit Sequences 利用部分发射序列的OFDM联合旁瓣抑制和PAPR降低

MILCOM 2013 - 2013 IEEE Military Communications Conference Pub Date : 2013-11-01 DOI: 10.1109/MILCOM.2013.26

Ertugrul Güvenkaya, Anas Tom, H. Arslan

{"title":"Joint Sidelobe Suppression and PAPR Reduction in OFDM Using Partial Transmit Sequences","authors":"Ertugrul Güvenkaya, Anas Tom, H. Arslan","doi":"10.1109/MILCOM.2013.26","DOIUrl":"https://doi.org/10.1109/MILCOM.2013.26","url":null,"abstract":"Orthogonal frequency-division multiplexing (OFDM) waveform is known for its drawbacks that affect application in practice: high out-of-band (OOB) radiation and high peak-to-average power ratio (PAPR). In this paper, we propose a three-stage technique for the joint reduction of OOB radiation and PAPR, therefore minimizing the spectral regrowth after the power amplifier as well as signal distortion. In the first and the second stages, the OFDM data vector is partitioned into contiguous blocks that are naturally suited for PAPR reduction using partial transmit sequences (PTS). Since edge blocks/subcarriers have more impact on the OOB radiation, each edge block is further divided into smaller interleaved sub-blocks, and optimized phase rotations are applied to each sub-block to suppress the spectral sidelobes. Following the frequency domain techniques, optimum phase rotation for the time domain OFDM symbol is calculated to achieve smoother transition with the previous symbol, which further reduces the OOB spectrum. The proposed method improves the joint containment in frequency and power dimensions, along which the OFDM signal suffers from high spreading.","PeriodicalId":379382,"journal":{"name":"MILCOM 2013 - 2013 IEEE Military Communications Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128752030","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: 19

A Markovian Approach to Modeling the Optimal Lifetime of Multi-hop Wireless Sensor Networks 多跳无线传感器网络最优生存期建模的马尔可夫方法

MILCOM 2013 - 2013 IEEE Military Communications Conference Pub Date : 2013-11-01 DOI: 10.1109/MILCOM.2013.288

Jian Lin, M. A. Weitnauer

引用次数: 7

Trusted Service Discovery through Identity Management 通过身份管理发现可信服务

MILCOM 2013 - 2013 IEEE Military Communications Conference Pub Date : 2013-11-01 DOI: 10.1109/MILCOM.2013.315

A. Fongen, T. H. Bloebaum

引用次数: 2

Real-Time Communications Resource Allocation Process, Architecture, and Algorithm 实时通信资源分配过程、体系结构和算法

MILCOM 2013 - 2013 IEEE Military Communications Conference Pub Date : 2013-11-01 DOI: 10.1109/MILCOM.2013.250

P. Hershey, Steven A. Davidson, Mu-Cheng Wang

{"title":"Real-Time Communications Resource Allocation Process, Architecture, and Algorithm","authors":"P. Hershey, Steven A. Davidson, Mu-Cheng Wang","doi":"10.1109/MILCOM.2013.250","DOIUrl":"https://doi.org/10.1109/MILCOM.2013.250","url":null,"abstract":"In today's budget constrained environment the DoD, government agencies, and commercial businesses are seeking ways to maximize resource usage and, thereby, improve mission capacity without increasing spending. Communications is one major area that offers opportunities for such improvement. In particular, mobile communications capabilities enable the establishment of communications connectively without an existing infrastructure, especially in emergency situations. Aerial platforms, such as unmanned aerial systems (UASs), have been shown to be ideal for use in maintaining mobile networks. They enable deployment in areas impossible for other vehicles to access while maintaining the necessary mobility to provide coverage to highly dynamic or widely dispersed networks. When properly embedded into the architecture of a communications network, the cooperation and control of multiple UASs can form a multi-layered hierarchical mobile ad-hoc network (MANET). This UAS aided network provides transport of flows that span longer distances, yield better reliability, and achieve higher throughput. Although MANET can potentially offer multiple routes for each given source and destination pair, it is important for each network node to select an \"appropriate\" communications path that can satisfy the mission requirements. In this work, we propose an agent-based bandwidth reservation technique, called the Real-time Communications Resource Allocator (CRA). The CRA addresses the route selection problem by providing a process, architecture, and algorithm to allocate bandwidth to a task based on its resource requirements and currently available resources before the task starts. A test bed was constructed to prove this concept. Test results demonstrated that the agent is able to reserve and dynamically re-distribute bandwidth to missions, if needed, according to the mission requirements, priority, and link assessment during the On-Mission phase.","PeriodicalId":379382,"journal":{"name":"MILCOM 2013 - 2013 IEEE Military Communications Conference","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127331664","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

Target Tracking in NLOS Environments Using Semidefinite Programming 基于半定规划的NLOS环境下目标跟踪

MILCOM 2013 - 2013 IEEE Military Communications Conference Pub Date : 2013-11-01 DOI: 10.1109/MILCOM.2013.38

R. Vaghefi, R. Buehrer

引用次数: 13

Protected MILSATCOM Design for Affordability Risk Reduction (DFARR) 可负担性风险降低(DFARR)的受保护军事卫星通信设计

MILCOM 2013 - 2013 IEEE Military Communications Conference Pub Date : 2013-11-01 DOI: 10.1109/MILCOM.2013.173

M. Glaser, K. Greiner, B. Hilburn, Jacob Justus, Christopher Walsh, W. Dallas, J. Vanderpoorten, Jo-Chieh Chuang, C. Sunshine

引用次数: 8