IEEE Communications Magazine 54(1): 68-75.).
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Revolutionizing software defined radio: case studies in hardware, software, and education. 2016 WYGLINSKI AM, OROFINO DP, ETTUS MN and RONDEAU TW.
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The software flexibility provided by SDRs comes from its ability to change its operation allowing the update of new and better features and better performance rate without any need to change constantly the hardware ( Wyglinski et al. SDRs use Digital Signal Processing (DSP) processors for very high-speed digital operations performing typical analog radio functions.
Software Defined Radios (SDRs) have been incorporated into ham radio equipment on the market to provide better performance, noise reduction and digital filtering. Ground stations satellites Software Defined Radio space systems Using the proposed SDR approach, it can adapt to projects mainly those with a limited budget and outreach for major inclusion on space topics in Brazil. Finally, a second study case was performed in order to receive NOAA class satellites imagery over VHF band and decoded by specific software freely available.
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A series of support software packages are then introduced so that one can pipeline various operations and automate tasks in the ground station.
Reception from the 1 st Brazilian picosatellite, Tancredo-1, with specific software developed, UbaTM is presented for obtaining satellite raw telemetries, convert them to engineering value and friendly present on user screen. Two case studies are presented for supporting affordable ground segment and promoting satellites projects in Brazil. This work briefly presents the SDR concept and approach for obtaining satellite telemetries and imagery in the context of different modulation schemes, link budget requirements and different satellites types. Software Defined Radio (SDR) uses a processor, a special receiver and software that play the main parts of the receiver (mixer, filters, amplifiers, modulators, demodulators, etc.) and it is quite advantageous for its flexibility and compact size as it reduces the amount of hardware components while adapting for different needs.
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