Lab based ppt pluto-sdr_final
- 1. Signal Processing using Pluto-SDR Bhavna Singh, 15116012 Lab Based Project Rohit Raushan, 14116058 B.Tech. 3rd yr, ECE Under the supervision of : Dr. Meenakshi Rawat
- 2. Abstract ● Here we represent the basic idea about the Software Defined Radio (SDR) and have demonstrated the fundamental digital modulation schemes. ● SDR is a technique which can be used to replace the current hardware. ● Implementation of simple modulation schemes like AM,FM and tested different modulation circuits to test our Pluto-SDR connectivity with GNU Radio signals and IIO-Oscilloscope.. Software Used: GNU Radio Companion, IIO-Oscilloscope.
- 3. Presentation Flow: 1) Software Defined Radio 2) Hardware Platform( Pluto-SDR) 3) GNU Radio Companion 4) IIO-Oscilloscope 5) SDR Working Model A) Transmit Test B) FFT & Waterfall Sink Test C) IIO Oscilloscope 6) GRC Implementation A) Cyclic Sine Wave B) Amplitude Modulation C) FM Receiver 7) Conclusion & Reference
- 4. Software Defined Radio ● A complete software implementation of hardware processes. ● Hardware like filters, amplifiers, modulators etc are implemented in embedding devices. ● Hardware complexity is widely reduced.
- 5. Software Defined Radio ● Dynamic nature of modifying the system parameters without changing the hardware part. ● Effective solution to the very high cost and limited flexibility of hardware based radios. ● Hardware Platforms: Adalm Pluto-SDR, RTL-SDR, FPGA Board.
- 6. ADALM-PLUTO SDR Active device features independent receive and transmit channels that can be operated in full duplex. FEATURES: ➢ Portable self-contained RF learning module ➢ Cost-effective experimentation platform ➢ RF coverage from 325 MHz to 3.8 GHz
- 7. FEATURES: ➢ Flexible rate, 12-bit ADC and DAC ➢ Small sized enough to put in a pocket ➢ GNU Radio sink and source blocks ➢ Up to 20 MHz of instantaneous bandwidth (complex I/Q) ➢ Two antennas (824 MHz to ~894 MHz/ 1710 MHz to ~2170 MHz)
- 9. GNU Radio Companion ● GNU Radio is a free & open-source software development toolkit. ● Provides signal processing blocks to implement software radios. ● It can be used with readily-available low-cost external RF hardware to create software-defined radios, or without hardware in a simulation-like environment. ● It’s a graphical tool for creating signal flow graphs and generating flow-graph source code.
- 10. II0 Oscilloscope ● IIO Oscilloscope is a product from Analog Devices, Inc. that uses libiio to interface with Linux IIO devices. ● It is a great tool not only for demonstrating capabilities of Analog Devices' products but also for testing, debugging and fine-tuning an RF system.
- 11. SDR Working Model ● In SDR, signal is captured by an antenna which is further converted into digital samples with regular intervals. ● These digital values are then processed in software. ● The resulting output can be then converted back into audio, video or required form.
- 12. Testing on PlutoSDR 1) Transmit test Next we tried adapting a simple transmit test by creating a flowgraph sending and receiving signal via Pluto-SDR. Transmit Performance: ★ Output Power (how far can I transmit) ★ Output Fidelity (how accurate is the transmission)
- 13. Transmit Test
- 14. 2) FFT & Waterfall sink ● We tested a simple FFT and Waterfall sink using the Pluto SDR source. ● We set the sample rate to the maximum of 61.44 MSPS, and the RF bandwidth to 60M. we were able to see the 900 MHz GSM band. ● It seemed the max sample rate is not used as the output is only 30 MHz, or perhaps it’s only one ADC.
- 15. FFT & Waterfall Sink
- 16. IIO-OSCILLOSCOPE We tested using the PlutoSDR IIO-OSCILLOSCOPE software and were able to generate a FFT spectrum of the GSM band
- 17. Cyclic Sine Wave Block Diagram Constellation Plot
- 18. Cyclic Sine Wave Output Plots: FFT PLOT Waterfall Plot
- 19. Amplitude modulation The modulation of a wave by varying its amplitude, used especially as a means of broadcasting an audio signal by combining it with a radio carrier wave.
- 21. FM Receiver Plot with GRC Block Diagram
- 22. CONCLUSION ● We have implemented simple modulation schemes and tested different modulation circuits to test our Pluto-SDR connectivity with GNU Radio signals and IIO-Oscilloscope. ● This concept of SDR using GNU Radio helps us to learn the concepts practically. ● Our work is to get familiar with GRC open source software tool. The basic demonstrations are done using the basic theories of communication systems. ● One single Universal Software Radio Peripheral (USRP) can implement all the modulations and multiplexing techniques in real time.
- 23. REFERENCE 1. https://www.mouser.in/new/Analog-Devices/adi-adalm-pluto/ 2. http://www.csun.edu/~skatz/katzpage/sdr_project/sdr/grc_tutorial.pdf 3. https://www.sciencedirect.com/science/article/pii/S187770581200985X 4. http://oz9aec.net/radios/gnu-radio/grc-examples 5. Analog and Digital Modulation Toolkit for Software Defined Radio-paper published by R.Gandhiraja , Ranjini Ramb , K.P.Somanb 6. Bard, John and Kovarik, Vincent, “Software Defined Radio: The Software Communications Architecture,” Wiley Series in Software Radio, 2007
- 24. Thank You