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Determining baud rate and throughput

Say we have an alphabet of cardinality 32, trying to send over a channel with bandwidth constraint fmin: 250mhz, fmax: 500 mhz. Signal is upsampled by a factor of 4, and interpolated at 1 ghz to meet ...
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0answers
7 views

Can anyone tell me about active cancellation techniques?

Can anyone tell me more about active cancellation techniques in detail ? Because i saw this paper : ( https://www.researchgate.net/publication/263352526_All-Digital_Self-...
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0answers
4 views

Gaussian Pyramid - Expand Operator

I'm trying to understand the EXPAND operator in Burt and Adelson's paper (https://s3.amazonaws.com/content.udacity-data.com/courses/ud810/readings/Burt-Adelson1983Laplacian-Pyramid.pdf) and I'm a bit ...
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0answers
16 views

Amplify a time domain signal and phase shift it by multiplying by a complex number

I have a real time domain signal contained in an array, it's just two different frequencies summed together. If I want to amplify this signal by 10 and phase modulate it by 0.5 degrees, will this work?...
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0answers
11 views

Are MATLAB function zp2tf() and tf2zp() are complementary or not?

I was under impression that given, pole, zero and gain the transfer function (filter coefficients b and a) is fixed. Therefore, ...
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0answers
9 views

power spectral density estimation

I have an audio signal carols.wav. How do I obtain the PSD in Matlab using the inbuild pwelch function and also to write my own code.
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1answer
14 views

Feature Extraction of Insect Sounds

First of all, forgive me if I sound stupid. I am still learning Audio Processing. So I am trying to make a machine learning model for detecting a specific insect through sound. Here is a sample raw ...
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0answers
11 views

Combining Multiple Point Clouds

I have a car with 8 lidars, each with a field of view of 60 degrees. My car looks like this How can I merge all the lidar readings into 1 point cloud?
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2answers
21 views

Plotting impulse functions on the same time axis with other functions in MATLAB

I am trying to plot the following function: I have to plot another function along with it all on the same plot. Got the other function working, but I can't seem to get this one working. The code ...
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0answers
12 views

How to simulate Zoom, Pan, Tilt transformations?

Say we are looking at a football field from a broadcast view. To give us another tool, we also have a transform of that view to a topdown view. So our two views are like so: How would one simulate ...
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6 views

How to calculate auto-covariance for a discrete-time symmetric block-wave?

I am newbie to this field, so this question seems difficult to me. I'd appreciate your help. For a discrete-time symmetric block-wave u(t), ...
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1answer
23 views

Zone Plate Reconstruction

I am trying to reconstruct the Zone Plate image and am struggling to remove the last remaining aliasing. ShaderToy: https://www.shadertoy.com/view/wdGGWK In the shader above you can see that I am ...
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0answers
18 views

Solving the system response using inverse Laplace transform

I am trying to solve this question but I got stuck when inverting the Laplace transform for this problem. I do not know that whether I do it right or wrong. Moreover, I do not know how to handle the ...
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1answer
34 views

Discrete wavelet transform disadvantages

I read in a paper that the discrete wavelet transform (DWT) has two disadvantages The first one is the shift variance property due to the downsampling process. Could you please help me understanding ...
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0answers
24 views

Third order hold system [on hold]

Extract the phase and magnitude of third order hold system and represent it by drowing?
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0answers
7 views

Optimizing a heating/cooling system for a particular input

Lets say I have a house with 2 rooms. One of them has a window that opens and closes T periodically. So the heat influx behavior of the window is like a square wave. There is an air conditioning unit ...
1
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2answers
34 views

Shift vector function in MATLAB

I am working on my own shift vector function that will be used later to compute the convolution of two signals. The function has to shift the vectors either left or right depending on the magnitude ...
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2answers
29 views

Passing a sampled signal through a filter

I was wondering why is it wrong to use a band-pass filter on a sampled signal? If the signal we want to sample has frequencies up to fmax, we sample it with frequency fs = 2fmax (so that Nyquist ...
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0answers
11 views

Validating tapping and singing

I have a recording of someone tapping while singing and need to check that this someone is tapping the right rhythm and singing the right notes. My intuition is to detect tapping through amplitude of ...
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1answer
32 views

Recovering a signal after filtering

A signal $x[n]$ is to be transmitted over a communication channel. The communication channel is described by an FIR filter of length $M$ such that the received signal is given by $$r[n]=\sum_{k=0}^...
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1answer
19 views

How to implement Matlab welch in python with the same result?

I want to implement Matlab pwelch function in python. The Matlab code is shown blew: [PSD,f] = pwelch(data,length(data),[],[],2000); which data is a row vector ...
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4answers
596 views

Can every type of linear filter be modelled by a convolution?

I have an input time series going through a filter that creates another time series as output. If I assume in first approximation that my filter is linear, does it necessarily mean that I can model ...
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0answers
9 views

Decorrelation for Adaptive Feedback Cancellation: How does it work?

I am going through lecture slides on adaptive feedback cancellation right now, and several decorrelation measures are mentioned. As I understand, these are important in order to avoid a bias in filter ...
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1answer
29 views

Is it possible the difference between OFDM-CP and OFDM-ZP about 10dB

I'm building basic matlab code for ofdm, but when I change the CP OFDM into ZP-OFDM with sme parameters, I get the performance is worse by up to 10 dB!! Is that right ? or there is some thing wrong in ...
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0answers
9 views

Is the network coding similar to decode and forward or coded and cooperative?

There are three methods that relay can transmit the information: Amplify and forward decode and forward coded and cooperative I want to ask which method is similar to the method i said Device $...
2
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2answers
51 views

Why is a circular mask appropriate for Fourier filtering rectangular images?

Suppose I apply 2D DFT to an image with dimensions $H{\times}W$ where $H \neq W$, then shift the DC component to the center. Why does a circular mask capture the lowest frequency components, i.e. why ...
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0answers
43 views

Root MUSIC and solution of conjugate palindromic polynomials

The root-MUSIC algorithm gives direction of arrival angles directly and avoids the computational overhead of computing the MUSIC estimator curve (see "Direction of Arrival Estimation using a Root-...
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1answer
13 views

Basic in “Precoding and Equalization Schemes”

I have found the interesting following paper for me: SVD-based MIMO Precoding and Equalization Schemesfor Realistic Channel Knowledge: Design Criteria and Performance Evaluation The paper is old, ...
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1answer
32 views

Frequency domain Inversion of a signal

I have been trying to calculate the inverse of a sweep (by inverse I mean something that when convolved with my original signal will yield a unit impulse) and although I managed to find a time-domain ...
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1answer
49 views

How to smooth filter response?

I have a filter designed in matlab with the function cheby2( N, Rs, Ws, 'stop'). The filter would give nice frequency response with for a given parameter set when the filter order is 2 or 4 (N=4). But ...
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1answer
35 views

How to filter very low amplitude staircase signal from a background noise

I have a staircase signal of a specific pattern that is drowned in a background noise. The ratio of signal to noise amplitude is nearly $10^{-4}$. I have attached the image of both with this post. I ...
2
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2answers
65 views

Convolution of Signal with a Gaussian Filter / Kernel

Following up on Analytical Solution for the Convolution of Signal with a Box Filter, I am now trying to convolve a Gaussian filter with the sine signal by hand. My method is to use the definition of ...
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2answers
40 views

Derivation of Nyquist Frequency and Sampling Theorem

I have been looking through different sites and questions over the internet about Sampling theory, but couldn’t find the clear definition of how nyquist frequency condition is derived? It would be ...
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0answers
40 views

Is there a better estimator with lower variance?

The output of a 2-input 2-output communication channel is given by: $x^{(1)}(t) = \sum_n {a^{(1)}_n}h_{11}(t-nT-\tau^{(1)})+\sum_n {a^{(2)}_n}h_{12}(t-nT-\tau^{(2)})$, and $x^{(2)}(t) = \sum_n {a^{(1)...
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0answers
7 views

Detect circle using Hough transform

I am new to image processing and try to learn how to detect circles using the hough transform in Matlab. I have a shortcode that seems to contain no errors but when I run it I get the image but with ...
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0answers
39 views

I need to proof this equality [on hold]

Let it be $\beta, f$ and $g$ real numbers, such that $\beta > 1$. Then $$f\vert f \vert^{\beta} - g \vert g \vert^{\beta} = \beta \cdot (f-g ) \int_0^1 \vert x(f-g) +g \vert^{\beta-1} dx$$
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1answer
18 views

confusion about poles and zeros of Lead compensator?

I was reading about lead compensator from a website but i am not able to understand how they have extracted zero and pole from transfer function of lead compensator as shown in attached photo? or ...
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1answer
18 views

Bessel filters: linear passband phase characteristic only for low pass filters?

I've found a test (internet) from the contest to signal processing teacher and it has a question (true) or (false). I cant find any book or paper to argue this statement. Is it really true?
2
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1answer
32 views

Initial Rest Condition for LCCDE causal LTI systems

I am self studying Alan Opennheim's course Signals and Systems. I am a math major and have no background in EE. I understand that for a LCCDE system to be linear its auxiliary conditions must be 0. ...
5
votes
2answers
50 views

Why can adaptive IIR filters result in unstable solutions?

For adaptive filtering, both finite and infinite impulse response (FIR/IIR) filters can be utilized. As an advantage of FIR filters in this context, guaranteed stability is often mentioned, while IIR ...
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0answers
16 views

How to correct phase using arctangent as Phase Detector

I have a DPLL that's trying to lock to a DSB-SC input signal with a carrier whose phase is $\theta$. So after some mixing and filtering (Costas Loop), I have these two signals ($\hat{\theta}$ is the ...
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1answer
20 views

Values of angular frequency of discrete-time sinusoidal signal

Why are the values of angular frequency of discrete-time sinusoidal signals in between -pi and pi?
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0answers
4 views

Show Feature vector on 3d mesh

My case is as following: I'm trying to extract features from mesh (vertices and faces), for example I had obtained zernike moments ...
0
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1answer
26 views

Fourier Transform of finite time series

I have some signal 𝑠(𝑡) which is real data i.e. finite. The time runs from −𝑇 to +𝑇. The signal amplitude is large at 𝑡=0 and small (→0) at the ±𝑇 limits. I can do a finite (discrete) Fourier ...
0
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1answer
45 views

Plotting curved peaks on PSD graph

I am a PhD student with little engineering experience, currently attempting to recreate the signal processing techniques used in this paper: Monitoring Vital Signs and Postures During Sleep Using WiFi ...
0
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0answers
14 views

Modified STFT resynthesis

This post is basically a follow-up to my recent question, which I asked here How to deal with phase incoherence issues after manipulating a signal in the frequency domain? In short, I'm modifying the ...
1
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0answers
26 views

RSP1A sample rate vs if bandwidth

I'm using the RSP1A SDR and I want to understand how to choose the best configuration for receiving a signal of 125 khz bandwidth. I would like to know if when choosing the option 200 KHz IF ...
0
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1answer
16 views

What is the form of the spectral derivative in the all-positive-frequency notation in DFT?

The Discrete Fourier Transform (DFT) of a function $u:[0,2\pi] \to \mathbb R$ sampled over $N$ equidistant points $\theta_j = 2\pi j/N,\, j = 0, \dots, N-1,$ is defined by $$ \tilde U_k = \frac1N \...
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0answers
20 views

Underwater acoustic channel is giving me a flat BER vs SNR curve

I need to do OFDM and GFDM signal transmission in underwater acoustic channel. I have my underwater acoustic channel as follow. ...
0
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0answers
32 views

GNU Radio - General Filtering Questions - Any feedback is appreciated!

This is a fairly general question I feel like. So, the scenario I am presenting is this: I am generating random data using the random source module and feeding that data into the Constellation ...

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