Questions tagged [hardware-implementation]
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28
questions
0
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2answers
37 views
Lattice structure realization of an all-pole system
Given an IIR system with the system function,
$$ H(z) = \frac{1}{2 + 1.4z^{-1} + 1.8z^{-2}} $$
I need to draw the lattice structure realization.
I have drawn the lattice structure for $\frac{1}{1 + ...
0
votes
0answers
31 views
Reducing hardware demands for an adaptive and complex-coefficient FIR filter
I want to implement a complex-coefficient FIR filter with adaptive coefficients in hardware (FPGA). The inputs to this filter are the I and Q channel as separate wires. The outputs are the filtered I ...
1
vote
0answers
22 views
Simple Impulse Response DSP Hardware
I developed some complex chains of filters and crossovers. After that I have created IRs from the entire chains.
Applying these IRs in software works perfectly.
Now I wonder what is the easiest (and ...
-1
votes
1answer
197 views
edge detection of 1-D signals
Would you please introduce me to some methods (or references) to do edge detection on some pulses (rectangular pulses embedded in noise). At first I apply some filters to smooth the signals, then I ...
0
votes
2answers
239 views
Implementing an analog approximation of an FIR filter given its impulse response
Problem:
I have the impulse response of a matched filter(therefore its phase and magnitude response. See figure below) of a filter, and I need to implement its response using only off-the-shelf ...
1
vote
1answer
192 views
Suggestion for a DSP board to implement a Kalman filter in real-time at a rate of around 4MHz or higher
I have been attempting to implement a Kalman filter on an FPGA in VHDL and have got to the point that it works. However I have the issue that each variable requires 64 bits to be represented to get ...
1
vote
1answer
487 views
Sequence Length for a Linear Feedback Shift Register
What is the total length for the sequence for a linear feedback shift register generated with a maximum length sequence, before repeating?
2
votes
1answer
251 views
Can't make sense from VHDL butterworth filter implementation
I am trying to understand the VHDL implementation of the 3rd order Butterworth filter published on opencores. Supposedly the filter implementation gets away with only division and multiplications by 2 ...
5
votes
2answers
297 views
Audio DSP HW Recommendation
I'm very new to DSP hardware, so I am taking it upon myself to learn it with regard to Audio and Acoustic Signal Processing. I've learned quite a bit of theory in a graduate DSP course, but absolutely ...
0
votes
2answers
389 views
Hardware implementation of Gaussian noise generator
I am implementing a GNG using Verilog. The implementation is based on the IEEE paper "Hardware Architecture of a Gaussian Noise Generator Based on the Inversion Method". In this, i could not ...
0
votes
1answer
226 views
Architecture for high sample-rate FIR/IIR filter on FPGA or ASIC?
Assume we have a hardware (FPGA or ASIC) which can operate at a fixed processing frequency of $100\textrm{ MHz}$. Assume we have an input data stream of $1\textrm{GSPS}$ (which has been sampled using ...
2
votes
1answer
297 views
Can we determine if a filter is butterworth or chebyshev from its physical topology?
Can all analog filters be classified as Bessel, Elliptic, Butterworth or Chebyshev?
Given a physical ladder topology of several stages of {L, C or LC} in {series or parallel}, is it possible to ...
0
votes
0answers
59 views
Estimating the power consumption of an arbitrary, real-time DSP algorithm
Consider a digital signal processing algorithm that operates over a block of $L$ [samples], with a real-time constraint $\tau$ [s] (i.e. its throughput must be $L/\tau$ [samples/s]).
The theoretical ...
0
votes
1answer
147 views
how much of DSP (digital signal processing) is related VLSI?
Although,this question may not be very much related to the topic of discussion, but i just wanted to know how much of DSP (digital signal processing) is used in VLSI. Like in the industry or for the ...
2
votes
2answers
601 views
DSP Hardware for Detecting an Audio “Click”
I am working on isolating a specific audio click in a factory type setting. After my initial analysis I determined that a 2-pole High Pass Filter set between 500 and 800Hz would work best for me.
The ...
1
vote
2answers
118 views
Embedded Image Processing System that sends photos to Smartphone via Bluetooth
I would like to create an embedded system that takes a Full HD photo by pressing a button,processes and compresses it(for ex. to jpg) and then sends it via Bluetooth to the smartphone - where it's ...
2
votes
2answers
598 views
Are SOS structures better for linear phase FIR filters?
I've seen many discussions suggesting that SOS's are often/usually the preferred structure for fixed point hardware filter implementations, since they preserve conjugate pairs, etc., but I've never ...
0
votes
1answer
33 views
How to accurately count the time period (hardware)?
Input : Square wave which sweeps over time domain. (about 1 MHz)
Output: The time period of high/low value.
Like the timer does, I would like to know the actual time (in sec) when the input goes high ...
0
votes
2answers
2k views
IIR filter implementation in Direct Form 2
I have implemented Direct Form 2 IIR filter. The input is the Kronecker delta function. I have written code for the response of the filter for Kronecker delta input. The code is:
...
0
votes
2answers
54 views
Acoustic record and store devices
I am working on a project involving analysis of bird sounds and I want to record these sounds in slightly remote locations. It is enough if the device can only record and store them (maybe in an SD ...
-3
votes
2answers
176 views
What is the best OS for real time signal processing? [closed]
I'm implementing a BCI-Wheel Chair Control System where signal are extracted from the arm into MATLAB -> feature extraction -> classification -> Control signal
The delay should be minimal between ...
asked Aug 14 '14 at 2:23
Carlos - the Mongoose - Danger
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4
votes
4answers
311 views
How many bits of precision are often used in fixed point DSP?
I understand FIR & IIR digital filters are often implemented in fixed point DSP hardware. I have also seen them implemented in software. Do companies make special purpose digital filtering chips ...
0
votes
1answer
295 views
Effect of bandwidth reduction in bit growth
I just want to ask, whenever you reduce a bandwidth of signal by filtering, I wonder why do you need to improve the number of bits used to represent that signal.
The number of bit growth is
$$\frac{1}...
-1
votes
1answer
67 views
benefit of dividing the signal processing job into two computers? [closed]
I am not sure if this is the right place to ask this question. I am asking it anyway..
In Aircraft Airbus 320, control inputs from the pilot's sidestick are processed by two computers for different ...
9
votes
2answers
918 views
What are some face detection (not recognition) algorithms suitable for limited (embedded) processors?
I am looking at a hardware based platform for surveillance class of applications. I want to identify faces of people as they appear in the scene.
I don't intend to really apply face recognition (...
7
votes
2answers
2k views
Low MIPS Video Encoder
I am looking for a low MIPS, low compression video encoder. This is for a 10fps, VGA type quality compression. What are my options? I need to be able to do this compression using a 150MHz ARM M4 CPU ...
4
votes
1answer
176 views
Apply decay envelope to waveform without multiplication
I'm trying to apply a decay envelope to a sinusoidal waveform using Verilog. Hardware constraints prevent use of multiplication to simply multiply by the envelope. The sine values and envelope values, ...
16
votes
2answers
3k views
Are there any standard implementation forms for tunable Butterworth filters?
One of the standard ways to implement a Butterworth filter is with a cascade of second-order sections, each corresponding to a pair of complex-conjugate poles. For a fourth-order filter, for example, ...
