Analog & digital Communication systems : Simplified view

Analog and digital communication system : simplified viewR.GandhirajAsst. Prof.(Sr.Gr.)Dept of ECEAmrita Vishwa Vidyapeetham

AcknowledgementDedicating this presentation to My Gurus

THEMEBridging between Thinking and Reality.. Transforming from 30-70 to 70-30contentsSpectrum for different applicationsAnalog Communication systemDigital Communication systemRole of SDR on developing communication systemProjects done Scope

1. Signals & systemsSignalhttp://hermes.eee.nott.ac.uk/teaching/cal/h61sig/sig0001.html Fourier Serieshttp://www.falstad.com/fourier/Fourier Transformhttp://www.jhu.edu/signals/ctftprops/indexCTFTprops.htm

1.1 Electro magnetic spectrum

Wavelength = C / F = Speed of Light / Frequency 1.2 mimic of nature

2. Analog Communication system

2.1 frequency translation

2.2 Modulation & muxAMhttp://educypedia.karadimov.info/library/tone_generator_mod.swfAM & FMhttp://engweb.info/courses/wdt/lecture07/wdt07-am-fm.htmlFrequency Division Multiplexinghttp://www.netbook.cs.purdue.edu/animations/fdm.htmlTime Division Multiplexinghttp://www.netbook.cs.purdue.edu/animations/tdm.html

Summary of analog system

2.3 Analog hardware

3. Digital communication system

3.1 Digital communication systemSampling & Aliasinghttp://www2.egr.uh.edu/~glover/applets/Sampling/Sampling.htmlQuantisationhttp://educypedia.karadimov.info/library/analo-num-synth-2.swfSource codinghttp://www.cs.sfu.ca/CourseCentral/365/li/squeeze/Huffman.htmlModeling Channel & Channel Codinghttp://ocw.mit.edu/ans7870/6/6.041/s06/tools/Bin_Sym_Channel/bin_sym_channel.htmDigital Modulation with applications + constellationsASK : http://www.netbook.cs.purdue.edu/animations/Amplitude%20Shift%20Keying.htmlFSKhttp://www.netbook.cs.purdue.edu/animations/Frequency%20Shift%20Keying.htmlM-PSKhttp://www.netbook.cs.purdue.edu/animations/Phase%20Shift%20Keying.html

3.2 application of digital comm system

3.2 Digital hardware

4. Role of SDR on developing communication systemApplicationsAnalog communication systems developmentDigital communication systems development

Software4. Role of SDR on developing communication system

5. Project works done MHRD Funded Project Virtual Lab Controlling Hardware using GNU RadioRealization of Control System

Works done @ cen amrita1. Amplitude Modulation schemes (Simulation and USRP implementation)- DSB (Double Side Band)- DSBSC (Double Side Band)- SSB (Single Side Band)

2. Frequency Modulation (Simulation and USRP implementation)- Tx & Rx using USRP1 & 2- Tx using USRP2 & Rx using FM Mobile phone

3. Design digital Communication system (Tx and Rx) using USRP- Source coding- Channel coding- Digital Modulation

4. Design a Low cost Communication system using Mixer and RTL-SDR

5. Create the GNU Radio block using C++/ Python

6. Design of Interpolator and decimator using VHDL and implementation of the same using Altera board/ implement using GRC

7. Design and implementation of CIC filter and various filter using VHDL.

8. OFDM based data communication

9. Video streaming experiments

10. Radiation pattern of Loop antenna and Yagi antenna

11. Wireless lab setup : GNU Radio + LAN connection (UDP)12. gr-bluetooth - Bluetooth Baseband Receiver13. GMSK Spacecraft Groundstation

6. Scope

Other possible worksAPPLICATIONSDttSP - sdr-core (low-latency full duplex SDR transceiver), vr (virtual radio control and application environment)Split-functionality MACs - a CSMA and TDMA MAC for GNU Radio, and platform to build additional MACsDynamic Spectrum Sharing - Implementation of Papyrus/Jello, a dynamic spectrum sharing system based on distributed OFDMA.Two-Way Relaying with Network Coding - An Implementation of relaying between two nodes with the help of USRPs.Over-the-air reconfiguration - A Demonstrator showing over-the-air reconfiguration for cognitive radio terminals using GNU Radio and USRPs.Wifi Localization - Localization software for use with BBN 802.11 (USRP2 version) or another communications system.simple_ra - A simple Radio Astronomy application to replace gr-radio-astronomyOpen Relaying Demonstrator - Platform for the evaluation of cooperative relaying strategiesgnss-sdr - A Global Navigation Satellite Systems software defined receiverfoi_mimo - A MIMO vs SISO demonstration implementationProtocol-Specific Decoders/Encoders 802.x FamilyFTW IEEE802.11 OFDM frame encoder - Transmit standard compliant IEEE802.11a/g/p frames using the USRP2BBN 802.11 - 802.11 code from BBN and the ADROIT projectSPAN 802.11b Receiver - a full-bandwidth 802.11b receiver.UCLA ZigBee PHY - implementing 802.15.4 to inter-operate with Mica2, MicaZ, and Telos B motes.RSSI-based 802.15.4 localization - 802.15.4 receiver with RSSI feature added, and application code for channel estimation, ranging and localizationConsumer Relatedgr-bluetooth - A Bluetooth baseband decoder, implementing packet sniffing and analysis (receive only)Gen 2 RFID - A Gen 2 RFID monitoring system and reader, along with USB subsystem modifications that reduce system latencyGen2 RFID Listener - A Gen2 RFID Listener for developing distributed RFID networks and monitoring systems.Logitech27MHzTransceiver - Transceiver for 27 MHz wireless keyboards from LogitechDect Receiver - Dect Receiver implementing PHY, MAC and limited subset of upper layersIndustry-Related StandardsopenLTE - Implementation of the 3GPP LTE specifications currently focused on downlink physical layer transmission and receptionRadio Data System - receiving the RDS signal of European FM broadcastersGMSK Spacecraft Groundstation - S/C groundstation transceiver using IP encapsulated in MPoFR.Motorola Smartnet Trunking Receiver - Receiver for Motorola Smartnet trunked systemsFuncube Dongle Source - Included in GNU Radio since version 3.5.3Mode S receiver - A Mode S/ADS-B receiver to track commercial aircraft from transponder reportsAIS - Automatic Identification System receiver for VHF shipborne position reportingESTCube-1 Receiver - Receiver for ESTCube-1 satellite, launched in 2013. Includes AX.25 decoder.7. Publications @ cen International Journals : 4 International Conferences: 10 National Conferences: 5 Workshop organised on SDRhttp://nlp.amrita.edu:8080/sdr/index.htmlhttp://acc-rajagiri.org/websites/acc-rajagiri.org/acc2012/SDR.asp

invitation National Level Workshop on Software Defined Radio (SDR) for Realtime Communication and Signal Processing @ Amrita Vishwa Vidyapeetham, Coimbatore Date: 26,27 & 28 July 2013

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