01838nam 2200493 450 991070401930332120151113162724.0(CKB)5470000002437465(OCoLC)929076165(EXLCZ)99547000000243746520151113j201508 ua 0engurbn|||||||||txtrdacontentcrdamediacrrdacarrierAn overview of a trajectory-based solution for en route and terminal area self-spacing seventh revision /Terence S. AbbottHampton, Virginia :National Aeronautics and Space Administration, Langley Research Center,August 2015.1 online resource (vii, 42 pages) illustrationsNASA/CR ;2015-218794Title from title screen (viewed on Nov. 13, 2015)."August 2015.""Prepared for Langley Research Center."Includes bibliographical references (page 42).Overview of a trajectory-based solution for en route and terminal area self-spacing Aircraft approach spacingnasatAlgorithmsnasatAir traffic controlnasatTrajectoriesnasatFlight plansnasatAircraft approach spacing.Algorithms.Air traffic control.Trajectories.Flight plans.Abbott Terence S.1389320Langley Research Center,United States.National Aeronautics and Space Administration,GPOGPOBOOK9910704019303321An overview of a trajectory-based solution for en route and terminal area self-spacing3472190UNINA11720nam 22006733 450 991100715710332120231110212500.09781523136599152313659697817856196251785619624(CKB)4100000010014469(MiAaPQ)EBC6577737(Au-PeEL)EBL6577737(OCoLC)1249474400(Exl-AI)6577737(EXLCZ)99410000001001446920210901d2020 uy 0engurcnu||||||||txtrdacontentcrdamediacrrdacarrierAdvances in Communications Satellite Systems Proceedings of the 36th International Communications Satellite Systems Conference (ICSSC-2018)1st ed.Stevenage :Institution of Engineering & Technology,2020.©2020.1 online resource (351 pages)Telecommunications 9781785619618 1785619616 Cover -- Contents -- Preface and Acknowledgements -- Author Biographies -- Section 1 - Multi-beam Satellite Systems -- 1. Symbol vs block level precoding in multi-beam satellite systems -- Introduction -- System Model and Problem Statement -- System Model -- Beam Pattern Over Europe -- Problem Statement -- Precoding Techniques -- Block-Level Precoding -- Symbol Level Precoding -- Complexity Comparision -- Simulation Results -- Conclusions and Further Research -- Acknowledgments -- References -- 2. Hardware Demonstration of Precoded Communications in Multi-Beam UHTS -- Introduction -- Hardware Demonstrator -- System Model -- Gateway -- Channel Emulator -- User Terminal -- Resource Occupation in FPGAs -- Conclusion -- Acknowledgments -- References -- 3. On the capacity of asynchronous cooperative NOMA in multibeam satellite systems -- Introduction -- System Model -- Channel Model -- Proposed Cooperative NOMA -- Gaussian Multi-Access Channels with ISI -- Two-User Channel with H(w) ... G(w) -- Two-User Channel with H(w) = G(w) -- Simulation Results -- Asynchronous Multi-Access Channel: Capacity Region -- Asynchronous MAC -- Asynchronous NOMA-Single Content Transmission -- Simulation Results -- Conclusion -- Acknowledgments -- References -- 4. Overlapping clustering for beam-hopping systems -- Introduction -- Related research works -- Frequency efficiency improvements for HTS -- Signalling aspects -- Availability and a number of gateways -- Beam hopping systems -- Efficiency degradation of conventional method -- Proposed overlapping clustering method -- Performance evaluation -- Simulation settings -- Evaluation results -- Conclusion -- References -- 5. Adjacent beams resource sharing to serve hot spots: a rate-splitting approach -- Introduction -- System Model -- Hot-spot Scenario -- Satellite payload -- Non-Coherent Rate-Splitting ( NCRS).Rate Optimization -- Competitive techniques -- Partial CSIT -- Full CSIT -- Numerical Results -- Conclusions -- Acknowledgments -- References -- Section 2 - Cognitive Communications and Propagation Channel Optimization -- 6. Time Correlation Used to Improve Time Diversity Gain of Rainfall Prediction -- Introduction -- Data Description -- Methodology and Results -- Improvement of Diversity Gain Formulas -- Conclusion -- References -- 7. Protection of the Mobile Station from the Interference by Maritime Earth Station in Motion in the 28 GHZ Band -- Introduction -- Interference Scenario -- System Characteristics -- Results -- Conclusions -- Acknowledgments -- References -- 8. Rateless codes for satellite systems over rain fading channels -- Introduction -- Satellite system with ACM -- Proposed scheme -- Operational principle -- Joint soft-iterative decoding -- Simulation results -- Simulation model -- Performance comparison with simulation results -- Conclusion -- Acknowledgments -- References -- 9. Channel States Information based Spectrum Sensing Algorithm in Satellite Cognitive Communication Networks -- Introduction -- System Model And Cognitive Scenario -- Cognitive Scenario -- System Model -- Channel States Information Based Spectrum Sensing Algorithm -- Algorithm Performance Verification And Discussion -- Conclusion -- Acknowledgments -- References -- 10. Wideband nonlinearities correction in digital payloads channels with parallel architectures -- Introduction -- Parallel HW implementation -- Methodology -- Many-Core DSP Architecture -- Software defined Volterra filter design -- Conclusions and Future Works -- References -- Section 3 - Flexible High Throughput Satellite Systems and Interference Mitigation Techniques -- 11. Modifications to Multi-beam Systems for DRRM -- Introduction -- Current HTS System Architecture.HTS System for DRRM Communications -- Transponder Modification -- Sample Digital Analysis Filter Bank Design -- Conclusions -- References -- 12. Adaptive Resources Allocation for Flexible Payload enabling VHTS systems: Methodology and Architecture -- Introduction -- Problem Definition -- Methodology for Adaptive Resource Allocation -- Study Cases -- Coverage Optimization -- Adaptive Resource Allocation Comparison -- Payload Architecture -- Conclusion -- Acknowledgments -- References -- 13. Adaptive Onboard Compensation of Non-Linear HPAsand Imperfect Butler Matrices in Multiport Amplifiers for High Throughput Satellites -- Introduction -- Multiport Amplifier Architecture -- Conventional linear MPA model -- Practical issues with conventional MPAs -- Proposed Two-Step Method -- Simulation results -- PSD Analysis -- BER analysis -- Conclusion -- References -- 14. Distributed precoding for multiple satellite systems with overlapping coverage areas -- Introduction -- Multibeam satellite systems: beyond state-of-the-art -- Multiple satellites systems: benefits and challenges -- Motivation -- Signal model and problem formulation in MS-COV architecture -- Precoding scheme in MS-COV configuration -- CSI feedback mechanism -- Feed selection method in MS-COV -- Numerical Results -- Simulation Setup -- Results -- Conclusion -- Acknowledgments -- References -- 15. Productized Multicarrier Predistortion Total Throughput Gainsaround 20% over Linearized Channels in True Customer Use Cases -- Introduction -- Assessed use cases -- Satellite parameters -- Waveform parameters -- Measuring methodology -- Measurement setup in the lab -- Measurement setup over satellite -- Gain measurement -- Predistortion gain leverages in a large throughput gain in an unbalanced carrier scenario -- Numerical results -- Power balanced scenario over satellite.Power unbalanced scenario over satellite -- Lab results -- Conclusion -- Acknowledgments -- References -- 16. A mitigation technique for adjacent channel interference in communication satellites -- Introduction -- Methodology -- Results -- Conclusion -- Acknowledgments -- References -- Section 4 - New Satellite System Architectures and Components -- 17. Novel RF architectures and technologies for VSAT -- Introduction -- Near and Long Term VSAT Architectures -- Relevant Passive Technologies -- Tunable High-Q Filters -- Compact Diplexers -- Low loss Phase Shifters -- Relevant Active Technologies -- GaN HPAs -- High-speed ADCs and DACs -- LNAs/LNBs -- Conclusion -- References -- 18. A Modular Architecture for Low Cost Phased Array Antenna System for Ka-Band Mobile Satellite Communication -- Introduction -- System Model and Antenna Aperture Requirements -- Modular Architecture Approach of large Scale Phased Array Antenna -- Design and Implementation of APAA Module -- Active phased array antenna: Super Module -- Results -- Conclusion -- Acknowledgments -- References -- 19. A cots-based software-defined communication system platform and applications in LEO -- Introduction -- Hardware -- Active phased-array antenna (APA) -- Software defined radio (SDR) -- Single-board computer (SBC) -- Power conditioning unit (PCU) -- Applications -- Example 1: Regenerative active phased array payload -- Example 2: Physical-layer assisted ranging -- Summary -- References -- 20. V-band low-noise amplifier module for high throughput satellite applications -- Introduction -- LNA unit design -- Key elements of the LNA module -- WG-MS Transition -- LNA MMIC -- Voltage Variable Attenuator (VVA) -- MLA MMIC -- LNA module test results -- Conclusions -- Acknowledgement -- References -- 21. Satellite payload design for cislunar communications -- Design requirements.Coverage area and constellation design -- Radio propagation -- Spectrum resources -- Frequency plan -- Reference scenario -- Capacity planning -- Baseline design -- K-band communications payload -- UHF-band communications payload -- S-band communications payload -- Payload Schematic diagram -- K-band spot beam antennas -- K-band Gateway antenna -- K-band antenna control electronics unit (ACU) -- UHF-band antenna -- S-band antenna -- Frequency conversion -- Channel multiplexing and filtering -- High power amplification -- UHF Digital Signal Processor -- Signal level analysis -- Conclusions -- References -- Section 5 - High Speed Optical Communications and Feeder Links -- 22. Alphasat, Sentinel-1A/B, Sentinel-2A/B, and EDRS Paving theWay for Systematic Optical Data Transfer for Earth Observation Missions -- Introduction -- The Laser Communication Terminal (LCT) -- The Ka-Band Transmitter -- Optical Inter-Satellite Link Execution Concept -- Alphasat TDP1, Sentinel-1A . . . and -2A, -1B, and -2B: optical partners in orbit -- Alphasat ( ASA) and Sentinels OISL Operations -- The European Data Relay Satellite System -- Links and System Performance -- Conclusions -- References -- 23. Diversity Architectures for High Data Rate Ground-to-Satellite Optical and EHF Links -- Introduction -- Satellite Systems with EHF and Optical Ground Space Links -- Use Cases for Ground Space Link Diversity -- Unified Network Layer Model for Diversity Switching -- Linear Programming-Based Optimization Model -- System Design Phase -- Operational Phase -- Implementation Considerations -- Conclusion -- References -- 24. Research and development approach to realize flexible opticalground network operations for effective data downlink from space to ground -- Introduction -- Methodology -- Optical ground network system -- Cloud monitoring and determination method.Optical network planning method.This book gathers the contributions from The 36th International Communications Satellite Systems Conference (ICSSC-2018) held in October 2018.Telecommunications Advances in Communications Satellite Systems - Proceedings of the 36th International Communications Satellite Systems Conference Advances in Communications Satellite SystemsAdvances in Communications Satellite Systems Proceedings of The 36th International Communications Satellite Systems Conference Artificial satellites in telecommunicationGenerated by AITelecommunication systemsGenerated by AIConference papers and proceedings.fastConference papers and proceedings.lcgftArtificial satellites in telecommunicationTelecommunication systems621.3825Otung Ifiok1689103Butash Thomas1824904Garland Peter1824905MiAaPQMiAaPQMiAaPQBOOK9911007157103321Advances in Communications Satellite Systems4392321UNINA