Hi
I was going through different methods to implement serial decoding for Flexray analogue electrical signal using Matlab. Any Suggestion or useful reference much appropriated !
Reference waveform from external tool attached. The electrical waveform is represented by 8bit(0x83)
Dear Sreeraj,
In order to preserve the waveform shape you have to perform waveform decoding. It is sometimes called pulse code modulation.
Such encoding has two parameters:
The sampling frequency fs which must be greater than or = 2fmax where fmax is the maximum frequency contained in the waveform.
The other parameter is the sample amplitude quantization which is determined by the allowed quantization noise. So generally very sample is quantized bu an n bits. As you toled n= 8,
Then you have only to determine fs by determining fmax.
This can be determined empirically or by the frequency analysis of the signal using FFT with oversampling.
Then one cut the bandwidth to the dominant frequency components.
If you take fs greater than 2fmax the reconstruction of the waveform will simpler.
Best wishes
Dear Sreeraj,
In order to preserve the waveform shape you have to perform waveform decoding. It is sometimes called pulse code modulation.
Such encoding has two parameters:
The sampling frequency fs which must be greater than or = 2fmax where fmax is the maximum frequency contained in the waveform.
The other parameter is the sample amplitude quantization which is determined by the allowed quantization noise. So generally very sample is quantized bu an n bits. As you toled n= 8,
Then you have only to determine fs by determining fmax.
This can be determined empirically or by the frequency analysis of the signal using FFT with oversampling.
Then one cut the bandwidth to the dominant frequency components.
If you take fs greater than 2fmax the reconstruction of the waveform will simpler.
Best wishes
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