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Signal Processing

Questions tagged [embedded-systems]

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46 questions
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3 votes
2 answers
143 views

I want to transmit around 40 bits in less than 1 ms in a noisy environment using a TMS320F28 chip (C2000 core, 200 MHz, FPU, VCU). I am currently trying FSK modulation and demodulation, but I am ...
Simlock's user avatar
  • 31
0 votes
2 answers
497 views

I am using the rand() function in C to generate white noise in DSP processors, but its behavior varies depending on where it is called. I have posted a question on ...
Mrk234's user avatar
  • 21
1 vote
1 answer
71 views

I am playing around with a 3 axis magnetometer to gather real world readings. I am trying to see how accurately I can measure the 50Hz component of an electric field around a mains wire. Now, ...
monkey's user avatar
  • 133
0 votes
1 answer
113 views

How to get an average of a sinusoidal signal? The frequency of a signal is 50 Hz and could have harmonics, i.e. high THD. I tried to use exponential moving average with low cut-off frequency (about 1....
Rafael Santos's user avatar
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2 votes
3 answers
1k views

I need to write my own resampling algorithm to resample sample and impulse response wav files between 44.1, 48 and 96 kHz. I'm on an embedded platform, so I don't have access to the usual libraries. ...
Tobias Hienzsch's user avatar
  • 100
0 votes
1 answer
99 views

I have built a Bluetooth speaker using an ESP32. It can stream BLE audio and play MP3/WAV from an embedded SD card. I want to record 44.1Khz res audio from it but unfortunately the ESP32 is not ...
hrithik singla's user avatar
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1 vote
1 answer
118 views

I am using FFTs to perform real-time convolution of audio signals on small embedded microcontrollers. I am thinking about testing different/smaller data types to represent the complex bins. I am ...
Tobias Hienzsch's user avatar
  • 100
1 vote
1 answer
331 views

I designed a board with an STM32H7, an ADC, and a TLV320DAC32. I'm in the stages of just getting a straight audio passthrough working. I am now getting signal output but it's all jumbled, and not at ...
Michael Beckwith's user avatar
  • 53
1 vote
1 answer
62 views

I have a line sensor with a $n$ number of detector elements, pixels. This line sensor should be used to capture data while moving so that later from the captured data images can be generated. The ...
ulix's user avatar
  • 111
0 votes
0 answers
74 views

How does Noise Reduction techniques implemented in code help us? I am working on an analog accelerometer and while I log the data, I see noise in the data values that is almost constant and in the ...
Diracx's user avatar
  • 1
2 votes
1 answer
799 views

Wanted to know the feasibility and usefulness of implementing Zero-Phase Anti-Causal filters such as those mentioned at this link in modern embedded signal processing applications given the ...
malik12's user avatar
  • 520
1 vote
2 answers
159 views

I found this free DSP book by Rutgers University professor Sophocles J. Orfanidis. The book is called Introduction to Signal Processing and the link contains many different implementations of common ...
yellow_watermelon's user avatar
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3 votes
1 answer
890 views

does anyone understand how to use the pocketfft by martin reinecke? Link: https://gitlab.mpcdf.mpg.de/mtr/pocketfft Basically it's just this snipped of code: ...
jp21's user avatar
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1 vote
1 answer
272 views

Say I have nRF52840 with 1 MB flash and cortex m4. Assume that I have a vector of $10^5$ int16 samples on which I would like to implement an RFFT. Now, Cimsis-DSP has an implementation for real fft, ...
Gideon Genadi Kogan's user avatar
  • 1,241
0 votes
1 answer
151 views

What ADC precision and sampling rate would you choose and why if You wish to record sound that has frequency components are 200 to 2000 Hz. And the signal-to-noise ratio of your microphone is 50 dB?
Rowaida's user avatar
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