Signal Processing

Questions tagged [embedded-systems]

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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'...
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2answers
160 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. ...
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1answer
131 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 ...
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13 views

I2c route location binary logic

i cant see the logic of defining the route location is the code bellow. for example _I2C_ROUTELOC0_SDALOC_MASK: at first we have 1F which is 0001,1111 we take its inverse 1110,0000 and we or'ing with ...
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2answers
949 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 ...
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2answers
80 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 ...
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3answers
260 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 ...
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1answer
287 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 ...
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1answer
77 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 ...
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0answers
45 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 ...
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1answer
560 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 ...
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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 ...
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1answer
70 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-...
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1answer
61 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 ...
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1answer
141 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 ...
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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 ...
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1answer
198 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 ...
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1answer
105 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 ...
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1answer
318 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
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1answer
194 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) ...
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1answer
549 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. ...
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1answer
310 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 ...
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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 "...
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2answers
358 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 ...
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1answer
671 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
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1answer
528 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\...

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