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# RadioDSP-Stm32f103
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# RadioDSP-Stm32f103
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THE RADIO DSP - PROJECT
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This project RadioDSP define a experimental open platform to build
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Real Time filtering and audio digital signal elaboration from
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a source audio signal in output form radio transceiver or receiver.
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The RadioDSP firmware define some FIR filter and routines to perform
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real time Noise Reduction based on various algorithm.
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The target hardware platform is Stm32f103 - Arm Cortex-M3 based processor.
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The functions built in the RadioDSP are:
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* Filter BPF CW NARROW (300 HZ)
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* Filter BPF CW NARROW (700 Hz)
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* Filter LPF SSB ( < 2400 Hz )
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* Filter LPF SSB ( < 3500 Hz )
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* Noise Reduction (Exponential Moving Average - 3 levels smoothing)
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* Noise Reduction (Simple Moving Average - 3 levels smoothing: 8,16,24 samples)
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NOTE: this is an experimental project and the functions can be changed
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without any advise.
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Info to noise reduction algorithms: info: https://en.wikipedia.org/wiki/Moving_average
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Calculator used for FIR filters: https://www.arc.id.au/FilterDesign.html
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The RadioDSP use some parts of the ARM Cortex Microcontroller Software
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Interface Standard (CMSIS).
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The RadioDSP use some parts of STM32F103 examples by Yohanes Erwin and
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others examples and projects free and available in the opensource
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community.
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The RadioDSP openSource software is released under the license:
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Common Creative - Attribution 3.0
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