DSP stands for Digital Signal Processing or Digital Signal Processor.

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How does a chipset determine which LTE bands it supports?

Take the snapdragon 800 and 801 chipsets. Both use the same hexagon DSP http://pages.cs.wisc.edu/~danav/pubs/qcom/hexagon_hotchips2013.pdf But a phone on verizon will only support LTE bands 4 and ...
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29 views

cheap Analog Devices Shark debuggers [on hold]

I am designing a board with the SHARK chip(ADSP-21261SKBCZ150). The choices I have for debugging and or programming are the ridiculously expensive solutions from AD or the one from Danville. Even that ...
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26 views

Where to start studying Digital Signal Processor(DSP) from? [on hold]

I'm a beginner in Electronics & I have done few project related to micro-controller C8051. Now I want to learn Digital Signal Processors. I already have an Idea of it's theory as a part of ...
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1answer
118 views

Is it possible to create an IIR filter in an FPGA that's clocked at the sample frequency?

This question is about implementing a IIR filter in a FPGA with DSP slices, with very specific criteria. Lets say you're making a filter with no forward taps and only 1 reverse tap, with this ...
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34 views

Is there a free HE-AAC decoder suitable for ARM MCUs?

Question itself: Is there a free (of charge, but if it's also open source that's even better) audio decoder for HE-AAC (AAC with SBR) that can use the FPU and/or DSP instructions in an STM32F4 ...
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FIR implemented via FFT — low-pass works good, high-pass gives distorted results. What's wrong? [migrated]

I'm implementing (in software) FIR filters. I have done two implementation: convolutional one and based on multiplication in frequency domain with FFT/IFFT. I'm using standard FFT implementation (not ...
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3answers
65 views

How to stretch high frequency digital signals (e.g., MIDI) into the audio range

I'm curious about the possibility of sonifying MIDI data, which has a bitrate of 31250. The range of human hearing extends to about 20kHz, which means that the fastest bits of the signal would lie ...
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4answers
113 views

VHDL: Using '*' operator when implementing multipliers in design

Present day FPGAs have built in DSP blocks, the latest FPGAs even have built in IEEE-754 compliant floating point units. It is possible to create DSP entity/module using a GUI after selecting the ...
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2answers
84 views

Lack of bass with higher sampling rates

I'm trying the ADAU1701 (from Analog Devices) with an external SPDIF receiver (TI's DIX9211). I've noticed that if I change the sampling rate, the amount of bass at my device's output changes. The ...
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4answers
116 views

How to select ADC resolution, considering input signal SNR and digital signal processing?

What I knew: The ADC resolution selection depends on the ADC inherent noise and input signal SNR. Our application: Very high precision measurement of signals ranging 1kHz to 10kHz. We want to get as ...
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46 views

Alternative of VisualDSP++ available for OSX?

Im wondering if there is anything like VisualDSP++ is available for OSX (searched the Googles, found nothing). I need to program a Analog Devices microchip for a school project. And I'm wondering if ...
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1answer
131 views

TIVA C series launchpads for arduino programmers

I have bought a Tiva C series Launchpad TM4C1294NCPDT by TI and wish to do a project on face recognition. I will soon get a DSP EVM by TI, but still confused which one to choose (MAY be the one with ...
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1answer
67 views

DSP - practical even or odd functions

Signals can be classified as even, odd, or a neither - in which case they can be broken up into their even and odd components. Theoretically its all very nice to be able to say that yes that function ...
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37 views

Analytical design of bandpass filter: MATLAB function documentation

I am trying to "design" a blackbox bandpass filter (butterworth or chebyshev) based on parameters such as \$f_{min}\$, \$f_{max}\$, bandwidth(BW)/Q-factor, and etc, using Visual Basic. However I am ...
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2answers
69 views

Looking for OP-Amp with good rail to rail performance, 5V to 0V [closed]

There are thousands of OP-Amps on Farnell's website, so I thought asking the stack-exchange community might be a good idea. I am looking for an OP-Amp for use in my project. I currently have an ...
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4answers
87 views

Image processing hardware options

My imaging system currently produces a stream of digitized video data at 10Msps. That is, parallel 12bit ADC output at 10MHz. The next step is to collect the data in 1024*1024 chunks and perform image ...
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1answer
65 views

Integrated audio DSP with free tools?

(Intro here, you can skip this for the actual question) As a hobby project I'm building an audio amplifier. It'll be the amp for my "home theater". I only have a small room so there's no room for 5.1 ...
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2answers
68 views

The meaning of Cross and Auto Correlation Matrices

I have to make some system where I have an input signal (i) and and feedback signal (f) and from this I create a autocorrelation Matrix (ACM) where ACM = i*i and cross-correlation vector (XCV) where ...
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2answers
68 views

Cascading Low Pass Filter Parameters

I'm trying to implement two cascaded low pass filters in a software application so that I can smooth out a potentially volatile data set. Based on the incoming data, I want a signal to be turned ...
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2answers
139 views

What is limp mode in PLL?

What does limp mode mean in this sentence below? Make sure the PLL is not running in limp mode.
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2answers
104 views

Signal power and perceived volume

With a couple of friends I am designing a synthesizer on an altera FPGA (cyclone II, the one on the DE2 board). We almost wrapped it up nicely but there's a problem that bugs us. The synth can ...
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1answer
95 views

Transfering audio data between two DSP's, clock sync problem

I have a system with two DSP modules. The audio is routed from DSP1 to DSP2 and then back to DSP1, which in turn immediately sends it to DAC. It's a high-quality stereo sound at 44.1KHz. This is a ...
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1answer
56 views

Why does frequency equal k/K where k=0,…, K-1 in Discrete Fourier Transform?

I totally can't understand why f = k/K. What does k, K means, respectively?. I really want to know what they actually indicate in real world. Or, please give me an example. I spent 2 days night but ...
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1answer
116 views

Is this DSP sinewave inverter a marketing hype?

There are some companies in my country(India) which try to sell inverters for home marketing in the name of DSP Sinewave Inverter and claim are superior to normal sinewave inverters. I am trying to ...
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2answers
74 views

IIr filter layout to formula problems

I am trying to create the formula for this layout but I have the feeling that I made a mistake. The formula that I have at the moment is: Can someone tell me if this is correct?
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40 views

Recommended setup for recording and processing 3 or more audio signals

I don't want to ask for specific products but the terminology in general: for a future experimental project I want to record multiple audio signals and I don't know yet which frequencies I'm ...
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1answer
140 views

HDMI microcontroller / DSP tutorial

I know a little bit about microcontrollers. I want to first say this question will be over my head but I'd like to do the project anyway... I want to have a HDMI input, add effects to the sound, then ...
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1answer
93 views

Can I connect an ADC directly to a DAC?

I'm planning to do some audio DSP soon but I would like to know if I can connect an ADC directly to a DAC without a processor in the chain. My main reason is to test preamp circuitry. I would like ...
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1answer
60 views

Poor man's equalizer with a few digital bandpass filters - how to overlap band edges

I am trying to implement an equalizer in an FPGA. It's not hifi or anything so 3 or 4 bands should cut it. So I have a low, band, and high pass filter covering the entire voice spectrum (0-4kHz in ...
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1answer
423 views

PIC32: How to use DSP Library?

I am using a Microstick II Board with the included PIC32MX250F128B and I would like to perform real-time audio processing. I use an analog input to get the input sound and a PWM output, in combination ...
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1answer
64 views

How many periods of a periodic signal are required to properly determine magnitude?

I have a pure sinusoidal test function. I am trying to determine the magnitude of the response through my circuit very soon after powering up with circuit. If I am using a 1kHz test signal, I only ...
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2answers
826 views

STM32F4 - Digital Signal Processing ( DSP )

At this website, I have read that STM32F4 microcontrollers have DSP instructions. To quote: It also implements a full set of DSP instructions I am beginning to learn embedded C programming with ...
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39 views

How to prove sampling is energy preserving using Parseval's Relation?

I have a continuous signal, xc(t) which is bandlimited to =pi/T, and x[n] = xc(nT) are samples of this signal. I need to show there is a Parseval's relation between the original signal and the sampled ...
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1answer
146 views

Barker code autocorrelation

How do you auto correlate the following Barker code? I tried to use the formula on Wikipedia's page but it did not make sense to me. +1, +1, -1, +1
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1answer
61 views

FFT of first N samples of signal? [closed]

Suppose if their are M samples in x(t) out of which I compute FFT of only first N samples of x(t), then the computed X[k] does this represent frequency component of first N samples or what I am doing ...
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83 views

DSP board for non-standard video output? [closed]

I've got a project that requires outputting three arbitrary video signals at video rates. The idea is that two of them represent the x and y axes of a raster scan, and the third carries monochrome ...
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2answers
102 views

Band-pass filter confusion

I'm having trouble understanding the concept of a Band-pass filter. Not, that I have the following signal (in the frequency domain): What I essentially need to do is remove the noise and only ...
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8answers
3k views

When can FPGA's be used and Microcontrollers/DSPs not?

I have to choose between a course on advanced microcontrollers, and a course on advanced FPGA's. I have had introductory courses in both subjects, and what troubles me now is that I am already ...
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3answers
497 views

What can the dsPIC do which the humble PIC microcontroller cannot do?

I have not used a DSP chip as of yet. All I know is that their architecture is such that they can carry out calculations quite fast, usually within a clock cycle, they have multiply-accumulate ...
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1answer
159 views

Convert (-4 to 4v) from sensor to 0-3.3v [duplicate]

Can you show me how can I make a schematic to convert signal voltage from sensor to ADC module of DSP. Sensor : -4 to 4 voltage DSP ADC: 0 to 3.3 voltage. Thank you,
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68 views

Measurement of frequency domain ripple of a filter

I am trying to analyze the passband ripple of various filter designs. I would like to know the correct way to measure the ripple. The trivial answer is to find the min and max amplitude in the ...
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1answer
157 views

Is there a way to build a software defined radio using the PC's DSP chip? [closed]

I'm looking to build a radio controller for a few DIY robots and was wondering if anyone knew of a way to utilize the onboard DSP in PC's as a SDR. The reasoning for this direction is I remember ...
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1answer
103 views

Digital Filtering [closed]

Lets say I have an audio signal and want to filter out anything below 100 Hertz. At first, I would think of a high-pass filter. A simple capacitor could do the job, but there are going to still be ...
2
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1answer
72 views

Z-Transform Initial Value Theorem

I have a small understanding of how to solve limits to infinity for regular rational equations, but I'm unsure of how to apply this to the Z-Transform initial value theorem. The equation is: \$ ...
2
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2answers
180 views

Dedicated digital filter

I have built a DDS (0-80MHz) with an FPGA (XC3S400) that I can program it for making almost any wave form (limited frequency by the wave form complexity). After weeks of struggling with making a ...
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122 views

Learning Curve For Microcontroller Programming & Anlog/Digital Electronics? [closed]

What is learning curve for embedded developer in which you can learn with doing small projects? I'm working in a power electronics firm. Our product portfolio is Inverters/Converters, Chargers, AC/DC ...
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1answer
336 views

How can I high pass (DSP) filter a low frequency signal without introducing lag?

I need to high pass filter a signal, and my design just isn't cutting it. The part that's making it tricky is that I can't tolerate lag. I am sampling at 20Hz, the signal I care about is 1/12 to ...
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1answer
116 views

What limits system clock in MCU? How high can I go?

I'd like to produce PWM outputs at f_PWM ~= 100kHz and I'd like to connect the ADC to sample at least once during each high-time interval of the PWM output. Everything in my configuration of these ...
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0answers
135 views

Fast (20MSPS) sampling to CPU (via MCU?)

What is the "state of the art" w.r.t. interfacing high speed A/D and D/A to CPUs? Our current system consists of a dedicated board with a PCI interface, containing a TMS320C64x DSP, which talks to 2 ...
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0answers
109 views

Capturing a 16.368MHz data stream with a MCU running at 32MHz

I have a 32MHz MCU (Atmel XMEGA A4) and I need to recover a digital signal coming from a GPS front end chip which is outputting SIGN and MAGNITUDE data at 16.368MHz. Clearly this is a hell of a task ...