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How to increase sampling rate without change of the signal bandwidth

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Fumihiko Sato
Fumihiko Sato 2023-4-14
回答： Walter Roberson 2023-4-24
Hello Everyone,
Could you please help to advise on how can I increase the sampling rate without without modifying signal bandwidth.
In my case. I having 600 Hz signal with 1.2k sampling rate (As attached screenshot).
For what parameters/block I set are following.
  • Bernoulli Binary Generator
Sample time = 1/600
Sample per frame = 200
  • Modulation : DBPSK
  • Raised Cosine Tx filter
Filter span in symbol =10
Output sample per symbol = 2
What I want is to have the same 600 Hz wide signal with sample rate to be ~ 1MHz.
Is it possible to do that?
Best Regards,
Fumihiko Sato

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采纳的回答

Sai Kiran
Sai Kiran 2023-4-24
Hi,
As per my understanding you want to increase the sampling rate of a signal.
You can use 'FIR Interpolators' to upsample your signal to a desired sampling rate.
By setting the Interpolation factor, your signal gets upsampled to InterpolationFactor*Existing_SampleRate.
Please refer to the following documentation for more information on 'FIR Interpolators'.
https://in.mathworks.com/help/dsp/ref/firinterpolation.html
I hope it helps!
Thanks.

更多回答（1 个）

Walter Roberson
Walter Roberson 2023-4-24
resample and then put it through a low pass filter at 600 Hz . The source rate is 600 Hz so logically the low-pass should leave everything the same, but in practice it should trim off some transients caused by the resample()

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