Questions tagged [embedded-systems]
The embedded-systems tag has no usage guidance.
16
questions
0
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1answer
36 views
How to generate IQ samples of a signal?
I am using a HW with LMS7002 RF transceiver chip. This chip takes IQ values as an input.
1. Can anyone point me to a sample IQ value generator? That I can use to test.
2. What will be the IQ values ...
0
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0answers
20 views
Understanding shift in Q values?
Can any one help me understand why there is a shift in Q values? It seems there is a DC offset/bias. How do I remove it or set it accordingly to make it equal to the I values/waveform? I am using a ...
1
vote
1answer
49 views
Neural networks in system identification - What type of activation functions?
I made a free software for all operative systems, even Android. It's called Deeplearning2C. It can train a neural network and generate C code and MATLAB-code. C-code for embedded systems and MATLAB-...
0
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1answer
47 views
Sampling rate issue in microcontroller
I am using a 3-axis LIS2D12H accelerometer interfaced with NRF51832 through the SPI interface.
The sensor has a sampling-rate from 1 Hz to ...
0
votes
1answer
98 views
Can I implement a LP filter using DMA?
This questions seems to be a little strange but bear with me.
I have an application that needs a digital filter to be implemented in a microcontroller.
What I want to do
I want to use the DMA to ...
0
votes
1answer
45 views
Confusion regarding a library of Digital Signal Controller
I'll be using a NXP DSC with 56800Ex core and my aim is to implement a Elliptic IIR Filter in it.
The User Reference Manual of the 'General Digital Filters Library' (which is available here) has ...
0
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1answer
136 views
Time series forecasting on dsp embedded systems
I have a time series analysis algorithm that uses arima modeling and fits a model to the time series and gets the residual values. It is more of a statistical signal processing algorithm than a ...
1
vote
1answer
82 views
Implementation of IIR Filter in dsPIC 33EP - Q15
I am implementing an IIR controller in dsPIC 33EP (16-bit, fixed-point, two's complement, wrap-around, 40-bit accumulator, 32-bit multiply, 12-bit ADC) and I am using cascaded, Direct Form I second ...
2
votes
1answer
255 views
Implementation of IIR Filter in dsPIC 33EP - Scaling
I have to implement an IIR controller in dsPIC 33EP (16-bit, fixed-point, two's complement, wrap-around, 40-bit accumulator, 32-bit multiply, 12-bit ADC) and I am using cascaded, Direct Form I second ...
2
votes
1answer
170 views
Orthogonal signal generator using integer arithmetic
I have a problem with implementing an orthogonal signal generator (OSG) algorithm on a microcontroller using integer arithmetic. I use this algorithm for a single-phase phase-locked loop (PLL) ...
0
votes
1answer
419 views
Doing audio processing with DFT on a microcontroller
I have written an audio processing application in C++ which runs on a desktop windows computer.
My next step is to implement this on an embedded system using a microcontroller, preferably arm-based.
...
0
votes
1answer
289 views
Long burst of high amplitude noise removal
I have a setup with an embedded DSPIC. This is used to link multiple audio inputs to the outputs and changed between them either when told to, or when one is active. This changing takes place on a ...
1
vote
2answers
951 views
Recommendations for DSP Hardware
I'm trying to figure out what a good DSP unit would be to try and learn how to do some embedded programming on? I would like something relatively inexpensive but that still has a decent amount of "...
0
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2answers
306 views
Why do we follow Shannon's Theorem in audio sampling?
My professor told me that in sampling a signal, is not usual to respect the Shannon theorem because the interpolation formula contains sines and fractions which are difficult to calculate with a ...
1
vote
1answer
615 views
Comparing two sound files in embedded-systems (C language)
what would be the most efficient ("cheap" in terms of system resources etc.) way to compare 2 sound files?
Here is the scenario. Sound A comes as an input. There is sound B stored in memory. We need ...
8
votes
1answer
483 views
Which digital modulation scheme would be suitable for transmitting digital data through the output of a PC soundcard
I need to output a data stream at $40\textrm{ kbit/s}$ or faster out of a computer system whose only accessible output peripheral is the audio interface. This interface has reasonable specs, $96\...
