'Noise floor' diaporamas de présentation

An Introduction to CDMA

1.02k views • 83 slides

INTRODUCTION TO DIGITAL MODES

Creede Lambard, WA7KPK Mercury Northwest November 2012. INTRODUCTION TO DIGITAL MODES. What is a digital mode?. What is a digital mode?. Any amateur radio mode that can or must be received, presented, encoded and transmitted by the use of a computer or other dedicated digital device.

1.1k views • 76 slides

Choosing a Transciever Far From Simple

648 views • 55 slides

Roofing Filters, Transmitted BW and Receiver Performance

784 views • 47 slides

First Generation Interferometers

Workshop on Astrophysical Sources for Ground-Based Gravitational Wave Detectors Drexel University. First Generation Interferometers. Barry Barish 30 Oct 2000. Detection of Gravitational Waves precision optical instrument.

645 views • 47 slides

ITN 220

RF Basics ITN 220 This class This is the short compilation of a number of topics. No math (only hints at it) Some physics (mostly pictures) Stop me when it starts to hurt Peroid, Amplitude, & Frequency The speed of light (or radio) 299,792,458 metres per second 1,079,252,848.8 km/h

927 views • 44 slides

HF Receiver Principles

HF Receiver Principles. Noise and Dynamic Range Jamie Hall WB4YDL. April 26, 2012. Reelfoot Amateur Radio Club. Receiver Sensitivity Limitations. Define Ant Noise Factor Noise Temp F(x) of graph Frequency Ant Noise Factor Noise Temp. Overview Linear except Daytime atmosphere.

410 views • 27 slides

DATA QUALITY CONTROL

385 views • 21 slides

BBQ system

BBQ system. Tatiana and Benoit, thanks to a lot of help from Christian Boccard, Marek Gasior and Ralph Steinhagen (BE/BI-QP). Agenda. Objectives of the BBQ system Principle Things to remember Example Next steps. Objectives of the BBQ system. Port 1. BBQ means BaseBand Q measurement

308 views • 20 slides

A Framework for Energy-Scalable Communication in High-Density Wireless Networks

A Framework for Energy-Scalable Communication in High-Density Wireless Networks. Telvis Calhoun Wireless Sensor Networks CSC8908-005 Dr. Li 8/27/2008. Background. Overview Power Control API Radio Channel Background Communication Models Summary. API.

306 views • 20 slides

A New Input Switching Scheme for a Capacitive Microgravity Accelerometer

A New Input Switching Scheme for a Capacitive Microgravity Accelerometer. Proposed by: Babak Vakili Amini Advisor: Farrokh Ayazi Georgia Institute of Technology School of Electrical & Computer Eng. Atlanta, GA, USA. Evolution of Integrated ? AXLs SOI Micro- Accelerometers

333 views • 19 slides

RFI measurements at the WSRT

RFI measurements at the WSRT. Hans van der Marel ASTRON RFI Mitigation workshop, Groningen, 29-31 March 2010. Introduction. Astronomical observations Local or non-local interference Spectrum monitoring station National Frequency allocation table Test observations for less known bands

429 views • 18 slides

Signal to Noise Ratio SNR CDDO 2009

Signal to Noise Ratio SNR CDDO 2009. Noise Floor CDDO 2009. Signal to Noise Ratio SNR SEAB 2009. Noise Floor SEAB 2009. Signal to Noise Ratio SNR 2009. Noise Floor 2009. Signal to Noise Ratio SNR CDDO 2010. Noise Floor CDDO 2010. Signal to Noise Ratio SNR SEAB 2010. Noise Floor SEAB 2010.

289 views • 18 slides

Gyan Prakash

Mechanical Properties of graphene. Gyan Prakash. Department of Physics, and The Birck Nanotechnology Center, Purdue University. March 23,2009. Class-Presentation Phys-570X. Science, 315 , 2007. Demonstrate how single and multilayer graphene sheets can be mechanically actuated.

309 views • 15 slides

JTA-3: EM-ambient site survey of industrial environments

JTA-3: EM-ambient site survey of industrial environments. Frank Leferink. Basis. Background: Data Beauvois-Catrysse ITU-R P.372-8: Radio Noise ERC Report 69: Propagation Model and Interference Range Calculation For Inductive Systems 10 kHz - 30 MHz (Marbella, February 1999)

281 views • 14 slides

SPP FIELDS Updated block diagrams Fault Tolerant Design

SPP FIELDS Updated block diagrams Fault Tolerant Design. Fault Tolerance Requirement.

177 views • 11 slides

PLC Field trial in Arnhem The Netherlands 2. Radiating characteristics of L ow V oltage D istribution Networks

Experiments related to network issues. PLC Field trial in Arnhem The Netherlands 2. Radiating characteristics of L ow V oltage D istribution Networks. PLC Field trial in the city of Arnhem , NL. Start 2002, end May 2003 150 houses; 337 modems (included repeaters)

274 views • 10 slides

Data Compression study with E2 data

Data Compression study with E2 data. S. Klimenko, B. Mours, P. Shawhan, A. Sazonov March LSC 2001 meeting Baton Rouge, Louisiana LSC Session : Detector Characterization. Use the E2 data as bench mark for existing compression methods new compression methods Issues investigated:

236 views • 10 slides

An Open-Source Standard T-Wave Alternans Detector for Benchmarking

An Open-Source Standard T-Wave Alternans Detector for Benchmarking. S.Nemati Massachusetts Institute of Technology (MIT). G.D.Clifford M IT, Harvard-MIT Division of Health Sciences and Technology (HST). A.Khaustov St.-Petersburg Institute of Cardiological Technics (Incart). Open Source.

470 views • 7 slides

Select Building/Structure Type Option

For the General User. Select Frequency Band. Select Region of Interest. Select Building/Structure Type Option. Performance Metrics Coverage Percentage: 10 dB margin. Stairwell. Refinery. Hallway. Convention Center. Complete Building. High-rise Office. 160 MHz: Summary View.

108 views • 2 slides