Questions tagged [embedded-systems]
The embedded-systems tag has no usage guidance.
27
questions
0
votes
1answer
54 views
Composing digital filters
I'm interested in composing filters for realtime audio processing on an microcontroller (MCU). Ideal frequency response is unity as a default, with deviations up and down at specific freq-domain ...
0
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1answer
39 views
IIR design: SciPy CMSIS-DSP coefficient format
How do you reconcile Scipy.signal's IIR design with CMSIS-DISP's API? Scipy.signal outputs in one of 3 forms:
Numerator/denominator
Pole Zero
Second-Order-Sections.
CMSIS requires an array of length ...
0
votes
0answers
22 views
Is the discrete or continuous-time state-space model most appropriate for implementing an embedded Kalman filter? [duplicate]
I'm writing down a state-space model of a mathematical pendulum, in order to estimate the system parameters in an embedded simple Kalman filter. So far I'm just modeling the system in Matlab and haven'...
1
vote
2answers
291 views
Calculate amplitude in dB and dBA from audio signal
Progress
I'm a product developer so kind of light on DSP inner workings. I have captured an audio signal - 1024 samples at a time. What I want to know is the amplitude of the wave in dB, and in dBA.
...
4
votes
1answer
137 views
Recommendations for learning and getting hands-on Real Time Signal processing
I know this is not a technical question, but wanted to get some opinion on how to get some hands-on experience on embedded DSP / real-time signal processing
I am comfortable with DSP and wireless ...
2
votes
2answers
1k views
DIY DSP projects ideas
I have a Masters Degree in DSP but all I learnt there is theory. I would like to complete some projects at home which I can add in my resume to showcase my skills and to get jobs in industry. But I ...
0
votes
2answers
89 views
Hardware kits for DSP Lab?
I have been assigned responsibility as Lab instructor of DSP at undergrad Level and so i have to equip my lab,please recommend which processors should i purchase for hardware implementation of dsp ...
2
votes
3answers
274 views
Confusion understanding digital signal processor?
I am reading wikipedia article about digital signal processor and as shown in end of attached snapshot
." Most general-purpose microprocessors can also execute digital signal processing ...
0
votes
1answer
386 views
general purpose microprocessor vs DSP(digital signal processor)?
I know that DSPs are specialized processors but i want to know what will happen if DSPs are replaced by general purpose processor in their applications? I know one application,mobile phone,will that ...
1
vote
1answer
117 views
simulator for dsp kit tms320c6713?without using actual hardware kit tms320c6713?
As you know, most universities across the globe are closed due to pandemic and people are unable to acess research facilites ,so in such a scenario one wants to improve his dsp hardware programming ...
1
vote
0answers
51 views
Hilbert Transform on split datastream produces phase flip
this is my first post here!
I'm trying to do phase correction on a signal from a linear CCD (2048 pixels, 10bit per pixel, 250kHz linerate) in an FPGA. Therfore I need to generate an analytical ...
0
votes
1answer
789 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
votes
0answers
23 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
72 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
votes
1answer
65 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
153 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
48 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
votes
1answer
203 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
110 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
324 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
201 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
564 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
317 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 ...
2
votes
2answers
1k 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
votes
2answers
366 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
686 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
543 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\...
