Questions tagged [pulse]

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5
votes
2answers
841 views

Fourier Transform of Alternating Periodic Rectangular Pulse

I'm having trouble determining Fourier transform of signal. I have 2 ideas on how to solve this problem. Given the signal is periodic I could use formula for Fourier transform of periodic signals: $$...
4
votes
1answer
907 views

Radar Pulse Compression Gain (PCR)

Assume a monostatic radar is transmitting a pulsed waveform. The pulse has been modulated by a Barker code with$\ N$ chips or bits. The waveform chip rate is $\tau_c $, the radar receiver's detection ...
3
votes
4answers
295 views

Estimate peak width from a vector that is a superposition of unknown number of identical Gaussian peaks with different heights?

If you have a vector that is a superposition of an unknown number of identical Gaussian shaped peaks/impulses of unknown width (but all the same width) and different amplitudes (with Poisson or ...
3
votes
1answer
137 views

Difference between Fourier-Transform and FFT of rectangular pulse

I'm trying to find a link between the Fourier-Transformation of aperiodic Signals and the FFT of them. So to start with a basic example, let's take a rectangular pulse with width 0.1s and amplitude of ...
3
votes
2answers
224 views

What is the autocorrelation of a Dirac pulse?

What is the autocorrelation of $x(t) = \delta(t)$? Can you explain to me how to calculate it?
2
votes
1answer
48 views

Minimizing Time Sidelobes with Pulse Compression

I am trying to compute a compression filter function to minimize the error from a a desired pulse compression result. The usual approach to doing this is to minimize the RMS error of the the ...
1
vote
0answers
224 views

SOQPSK-TG pulse shaping

I'm trying to build an SOQPSK-TG signal in MATLAB/Octave. I am following this paper for formulas. I'm trying to generate a waveform for the phase, equation 2.4: Where q(t) is the phase pulse, ...
1
vote
0answers
160 views

Probability of Detection and pulse-pulse decorrelation time

I'm trying to analyze the probability of detection ($P_d$) for a Swerling II target. I know that the Swerling II target assumes that the Radar Cross Section (RCS) is an exponential probability density ...
0
votes
1answer
183 views

Pulse duration detection

I have a signal sequence where multiple pulses with different amplitude and duration may occur at random times. White noise is present as well. I was searching for a Matlab function which could detect ...
0
votes
1answer
60 views

Which physical device accomplish the task of pulse shaping?

So I'm reading a lot about DSP lately and now I'm learning about pulse shaping. I understand the way it works and how useful it is to avoid (or reduce) ISI. But, I was wondering which physical device ...
0
votes
2answers
431 views

Detection of sharp peaks in an audio signal

I have an audio signal and I'm interested to detect the very sharp peaks. If I zoom, here is something that should NOT be detected (this is voice actually): NO GOOD Here is something that should be ...
0
votes
1answer
100 views

Upsampling and pulse duration

How does upsampling factor relate to pulse duration? If I want to do pulse shaping and I have rcosdesign(beta,span=8,sps=4) should I upsample by ...
0
votes
0answers
16 views

Extracting time-tagged pulses from Geiger audio recording

I am doing some tests with SmartGeiger detector designed for smartphones. The sensor unit sends pulses via phone microphone jack input and the app does the counting and calculates the values. However,...
0
votes
0answers
29 views

How can I generate a time domain square pulse that relies on frequency and not zero centered at MATLAB?

I want to create a square pulse, then use FFT on it. However, this code does not relies on central frequency to generate a pulse, and it is centered at 0 in time and frequency. ...
0
votes
0answers
25 views

How do I make a Gaussian pulse that works on different wavelengths in MATLAB?

I want to make this MATLAB code to plot a Gaussian pulse in THz, then use FFT on it. This is the MATLAB code I used to get the FFT of time domain Gaussian signal at 800nm wavelength: ...
-1
votes
1answer
108 views

Increase Radar Detection range using Modulation

I have been reading about pulse compression which helps with the range resolution. In my application I do not need to measure the range of the object however I am more interested in boosting the SNR ...