What is the function of 'Down Sampler' in simulink template 'SoC Blockset/RF SoC', and how to change the parameters if i want to transmit different frequency?

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zuyuan
zuyuan 2024-1-31
编辑： Akash 2024-2-15
In the project template 'RF SoC' (RF SoC template document), it allows user to send data from FPGA to processor. However the data must go through a block called 'down sampler' before send to the processor.
I can't understand how does this 'down sampler' works, and which parameter do I need to change if I want to transmit a signal with more samples and higher frequency.
If anyone can help me to get a more clear view of this 'down sampler' block, I would be much appreciated!

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Akash
Akash 2024-2-14
编辑：Akash 2024-2-15
Hi Zuyuan,
The 'down sampler' block is used to reduce the transmission rate of the signal before it is sent to the processor. This is typically done to match the processor. The rate at which the signal is downsampled is controlled by the "downSamplingFactor" parameter. You can change this parameter value from the MATLAB Workspace to adjust the number of samples transmitted.
SoC Blockset provides an 'RF Data Converter (RFDC)' block in Simulink that allows to configure various parameters to suit the application requirements, including the sample rate and bandwidth of the signal to transmit.
To get more information about how to configure these parameters, you may refer to the MATLAB documentation link provided below. https://www.mathworks.com/help/soc/ug/rangedopplerradarusingxilinxrfsocdevice.html#:~:text=RF%20Data%20Converter%20Configuration

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