scholarly journals Design of a Reduced SpaceFibre Interface: An Enabling Technology for Low-Cost Spacecraft High-Speed Data-Handling

Aerospace ◽  
2019 ◽  
Vol 6 (9) ◽  
pp. 101 ◽  
Author(s):  
Gianmarco Dinelli ◽  
Pietro Nannipieri ◽  
Daniele Davalle ◽  
Luca Fanucci
Keyword(s):  
High Speed ◽  
Low Cost ◽  
European Space Agency ◽  
Rate Capability ◽  
Data Rate ◽  
Low Earth Orbit ◽  
Space Applications ◽  
Single Interface ◽  
High Data ◽  
Synthetic Aperture Radars

SpaceFibre is an upcoming on-board high-speed communication protocol for space applications. It has been developed in collaboration with the European Space Agency to answer the growing data-rate requirement of satellite payloads such as Synthetic Aperture Radars or hyper-spectral imagers. SpaceFibre offers a complete set of features (i.e., Fault Detection, Isolation and Recovery, and Quality of Service) that guarantees robust communication at the price of higher complexity. This article proposes an innovative modified implementation of the SpaceFibre standard: R-SpaceFibre. It has been designed to reduce hardware resources while keeping high data-rate capability and flow control. Attention is given to the trade-off between Data link layer complexity reduction and protocol features. The proposed protocol is particularly suitable in scenarios where very low bit error rate is foreseen and data integrity is not critical, for example in imaging instruments. The main advantage is a reduction of more than 40% of logical resources required per single interface. R-SpaceFibre may be a suitable solution for several applications, such as low earth orbit CubeSats, which have strict requirements in terms of available logic resources, mass, volume and cost, and more relaxed constraints in terms of upset immunity.

scholarly journals On the Frequency Carrier Offset and Symbol Timing Estimation for CCSDS 131.2-B-1 High Data-Rate Telemetry Receivers

Sensors ◽  
2021 ◽  
Vol 21 (9) ◽  
pp. 2915
Author(s):  
Matteo Bertolucci ◽  
Riccardo Cassettari ◽  
Luca Fanucci
Keyword(s):  
European Space Agency ◽  
Data Rate ◽  
Low Earth Orbit ◽  
Timing Recovery ◽  
Frequency Error ◽  
Clock Frequency ◽  
High Data ◽  
Trade Offs ◽  
Depth Analysis ◽  
Frequency Correction

In recent years there have been significant developments in satellite transmitter technology to follow the rapid innovation of sensors on-board new satellites. The CCSDS 131.2-B-1 standard for telemetry downlink, released in 2012, is part of the next generation of standards that aims to support the increased data-rate caused by these improvements in resolution. As a result of its relative novelty, this standard currently lacks in-depth analysis by researchers, but it is also strongly supported by the European Space Agency (ESA) for future missions. For these reasons, it seems important to evaluate how major receiver sub-components, such as timing recovery and carrier frequency correction, can be designed and implemented in new receivers that support this standard. The timing error detectors (TED) and frequency error detectors (FED) were therefore studied on the specific peculiarities of CCSDS 131.2-B-1 in its usual environment of Low Earth Orbit (LEO). Estimators have been evaluated highlighting performances, trade-offs and peculiarities of each one with respect to corresponding architectural choices. Finally, a receiver architecture derived from the paper considerations is proposed in the aim of supporting very different mission scenarios. Specifically, the realized architecture employs a parallel feedforward estimator for the timing recovery section and a novel multi-algorithm feedback frequency correction loop to efficiently cover both low symbol rates (5 Mbaud) and high data-rates (up to 500 Mbaud). This solution represents a good trade-off to support these scenarios in a very compact footprint by pushing the clock frequency to the FPGA limit. The FPGA resources occupation on a Zynq Ultrascale+ RFSoC XCZU28DR FPGA is 5202 LUT, 4851 FF, 5 BRAM, and 21 DSP for the timing recovery part, while the frequency recovery section occupies 1723 LUT, 1511 FF, 2.5 BRAM and 32 DSP.

High Speed Radio over Fiber System for Wireless Local Area Networks by Incorporating Alternate Mark Inversion Scheme

2018 ◽  
Vol 0 (0) ◽  
Author(s):  
Abhishek Sharma ◽  
Priyanka Chauhan
Keyword(s):  
High Speed ◽  
Transmission Rate ◽  
Low Cost ◽  
Wave Length ◽  
Local Area Networks ◽  
Local Area ◽  
Radio Over Fiber ◽  
Wireless Local Area Networks ◽  
Fiber System ◽  
High Data

Abstract Radio over fiber (RoF) technique has revolutionized communication industry with its high data transmission rate and ability to carry the radio signal with speed of light. It finds its application in wireless local area networks (WLANs) due to easy of deployment and low cost. This paper utilizes alternate mark inversion (AMI) technique in wave length division multiplexing (WDM) scheme to further enhance data carrying capacity of the system. It is observed that proposed AMI-WDM scheme is better technique for providing high data rates and is confirmed via SNR, Q factor and eye diagrams.

Characteristics of a System in a Package with Silver Wires

2015 ◽  
Vol 661 ◽  
pp. 121-127 ◽  
Author(s):  
Yeong Lin Lai ◽  
Wen Jung Chiang
Keyword(s):  
High Speed ◽  
Low Cost ◽  
Signal Integrity ◽  
Random Access ◽  
Data Rate ◽  
Performance Requirement ◽  
Eye Diagram ◽  
Fine Pitch ◽  
Aperture Width ◽  
System On A Chip

The system in a package (SiP) including of a system on a chip (SoC) and a double-data-rate-three synchronous dynamic random access memory (DDR3 SDRAM) were studied with respect to the high-speed characteristics. The SiP was the multi-chip-module thin-profile fine-pitch ball grid array (MCM TFBGA) package with four-layer substrate. The high-speed 1600-Mbps data rate DDR3 signals were used in the signal integrity (SI) analysis. The SiP with low-cost silver (Ag) wires displayed a 500.18-ps aperture width in the eye diagram, which was successfully achieved signal integrity (SI) performance requirement. This work demonstrated the SiP with the Ag wires was the great potential solution for the advanced high-speed product applications.

scholarly journals Proactive Forwarding of High Data Rate in Smart Virtualization Networks for High-Speed Trains

2020 ◽  
Vol 14 (2) ◽  
pp. 1670-1681
Author(s):  
Fouad Ali Yaseen ◽  
Hamed S. Al-Raweshidy
Keyword(s):  
High Speed ◽  
Data Rate ◽  
High Data Rate ◽  
High Data ◽  
High Speed Trains

Earth-to-space and high-speed “air” transportation: an aerospaceplane design

2019 ◽  
Vol 91 (2) ◽  
pp. 381-403
Author(s):  
Nikolaos Kehayas
Keyword(s):  
High Speed ◽  
Thermal Protection ◽  
Low Cost ◽  
Air Transportation ◽  
Low Earth Orbit ◽  
Earth Orbit ◽  
Rocket Engines ◽  
Content Type ◽  
Alternative Approach ◽  
Point To Point

Purpose The purpose of this paper is to attempt an aerospaceplane design with the objective of Low-Earth-Orbit-and-Return-to-Earth (LEOARTE) under the constraints of safety, low cost, reliability, low maintenance, aircraft-like operation and environmental compatibility. Along the same lines, a “sister” point-to-point flight on Earth Suborbital Aerospaceplane is proposed. Design/methodology/approach The LEOARTE aerospaceplane is based on a simple design, proven low risk technology, a small payload, an aerodynamic solution to re-entry heating, the high-speed phase of the outgoing flight taking place outside the atmosphere, a propulsion system comprising turbojet and rocket engines, an Air Collection and Enrichment System (ACES) and an appropriate mission profile. Findings It was found that a LEOARTE aerospaceplane design subject to the specified constraints with a cost as low as 950 United States Dollars (US$) per kilogram into Low Earth Orbit (LEO) might be feasible. As indicated by a case study, a LEOARTE aerospaceplane could lead, among other activities in space, to economically viable Space-Based Solar Power (SBSP). Its “sister” Suborbital aerospaceplane design could provide high-speed, point-to-point flights on the Earth. Practical implications The proposed LEOARTE aerospaceplane design renders space exploitation affordable and is much safer than ever before. Originality/value This paper provides an alternative approach to aerospaceplane design as a result of a new aerodynamically oriented Thermal Protection System (TPS) and a, perhaps, improved ACES. This approach might initiate widespread exploitation of space and offer a solution to the high-speed “air” transportation issue.

scholarly journals High Speed Laser Based Intersatellite Link Systems for Harsh Environment of Space

2019 ◽  
Vol 2 (1) ◽  
Keyword(s):  
Fiber Optics ◽  
High Speed ◽  
High Performance ◽  
Low Earth Orbit ◽  
Critical Parameters ◽  
Great Promise ◽  
Harsh Environment ◽  
High Data ◽  
Aerospace Applications ◽  
Laser Communications

This paper will focus on the trends for the space-based lasers, optics and terminals used in the intersatellite networks. Reviewed and evaluate the recent development in the space-based laser technologies and the critical parameters that are employed for successful high-speed intersatellite communications systems. Fiber optics and photonics technology including lasers increasingly being used in aerospace applications and many challenges are involved, since designing for aerospace is very different than for the earth environment. Satellites are much more challenging and for their intersatellite solutions have to contemplate more specific requirements such as space radiation attacks, operation in harsh environment of space and achieving weight, power requirements and reliability for space are few to consider. Therefore it is important to design a system to defend against the radiation from ionizing, gamma, and other attacks. There are numerous methods to protect them from radiation, including shielding, error correction, and using radiation resistance shielding and radiation hardening. Building laser for high speed communications network for the harsh environment of space using optical links in space has proven to be complicated task and many such schemes were tried without success in the past. Space-based optical communications using satellites in low earth orbit (LEO) and Geo-synchronous orbits (GEO) hold great promise for the proposed Internet in the Sky network of the future. However in the last few years, there has been impressive progress made to bring the concept of laser-based intersatellite systems to fruition in civilian and government-non classified projects. Laser communications offer a viable alternative to established RF communications for inter-satellite links and other applications where high performance links are a necessity. High data rate, small antenna size, narrow beam divergence, and a narrow field of view are characteristics of laser-based systems and they are just few numbers of potential advantages for system design over radio frequency communication.

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