BALTICS SCIENTIFIC CONFERENCE. December 5, 2018
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1 BALTICS SCIENTIFIC CONFERENCE December 5, 2018
2 RF Development courses 12:10-12:20 Phased Array Digital Signal Processing courses 12:20-12:30 Dr. Romass Pauliks
3 Content Objectives of the WP3 The Course Content (Week 1 & 3) Group Photo of the Participants (Week 1 & 3) The Course Content (Week 4) Group Photo of the Participants (Week 4) Outcome Impact
4 Objectives of the WP3 Transfer of expertise in the techniques and practice of RF development. Transfer of expertise in the techniques and practice of phased array digital signal processing. Transfer of expertise in interferometer development and construction. Transfer of expertise in LOFAR station hardware and maintenance.
5 The Course Content (Week 1) This training week addressed the basics of RF development, in the context of Radio Telescopes. The goal of the training was that the participants: can identify the various components of an RF receiving system, know the characteristics of these components and can combine these elements into a system and predict the performance.
6 Group Photo of the Participants (Week 1) Group photo of Participants and ASTRON staff in front of the Dwingeloo radio telescope
7 The Course Content (Week 3) The aim was to push the student s knowledge of DSP up to MSclevel, i.e. a level comparable with a full-grown university. Signals = classifications; representations; operations Transforms = [Continuous-Time] Fourier Transform Signals = sampling; quantisation Transforms = Discrete-Time Fourier Transform (DTFT) & Z-Transform Systems = general: characterisation; properties; behavior Systems = specific: LTI - digital filters: classification; analysis; synthesis
8 Group Photo of the Participants (Week 3) Group photo off the Participants and Ronald de Wild of ASTRON
9 Outcome (Week 1 & Week 3)
10 Outcome (Knowledge and Skills) 1 Mathematical concepts Signals, Linear Systems, Fourier Transformation, Complex calculations RF principles Amplification, Noise Behavior, Cascading elements, Logarithmic units Transmission Line Waves, Reflection Smith Diagram and Port Description 2 port description, Measuring S parameters
11 Outcome (Knowledge and Skills) 2 Basic principles Non linearity, Noise, Sensitivity, Dynamic range RF building blocs PLL, Oscillators, Mixers, Amplifiers, De-modulators, Filters Examples Receiver architecture, Transceiver, WSRT, LOFAR Practicum Use of spectrum analyzer (Gain, IP2nd, IP3rd), Use of noise meter
12 The Course Content (Week 4) During Week 4 Advanced Signal Processing, the focus moved towards special topics within the field of digital signal processing, like multi-rate signal processing (poly-phase decomposition), spatial signal processing (beamforming) and array signal processing (filterbanks). These topics provides a solid background for signal processing architectures, essential for understanding the signal processing back-end of e.g. a LOFAR-station.
13 Group Photo of the Participants (Week 4) Group photo of the Participants and Ronald de Wild of ASTRON
14 Outcome (Week 4)
15 Outcome (Knowledge and Skills) - 1 Digital Signal Processing (DSP) DSP application Signal classification, representation and operation (analog, digital, convolution, de-convolution) Fourier Transform Discrete Fourier Transform (DFT) application Fast Fourier Transform (FFT) application Discrete-time Fourier Transform (DTFT)
16 Outcome (Knowledge and Skills) - 2 Spatial Filtering and Array Processing EM waves Phased array Beamforming, array processing Multirate (& Array) Signal Processing Serial & parallel datastreams, sampling rate conversion (SRC), SRC-circuit analysis, poly-phase decomposition, filterbanks Statistical & Adaptive Signal Processing Correlator, Statistics (Mean, Variance )
17 Impact
18 Impact Electronic and Satellite Division High Speed Communications system (HSCOM) designed for nanosatellite: Antenna design; RF PCB designed and layout; FPGA/VHDL programming. Ground Station Design for Nanosatellites: SDR (USRP) programming; GNU Radio, Phyton.
19 Nanosatellite payload subsystem Electronic and Satellite Division Nanosatellite Ground Station for Nanosatellites USRP/ SDR. GNU Radio, Python FPGA/ VHDL HSCOM Antenna
20 High Speed Communications (HSCOM) Uplink 5.66 GHz ( ) Downlink 5.84 GHz ( )
21 HSCOM antenna technology: microstrip frequency band: ISM 5.8 GHZ beamwidth: H-plane 45 deg, E-plane 52 deg substrate dimensions: length 65 mm, width 55 mm Radiation pattern in space (3D model). Directivity at broadside 11.5 db. Gain at broadside 11 db (taking in account total efficiency).
22 Thank you for your attention.
23
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