Questions tagged [signal-detection]
The signal-detection tag has no usage guidance.
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Detect active channel used in a lora network
I am trying for quite some days now to detect which channel was used for a transmitted LoRaWAN frame.
For those who are not familiar with lora: LoRa makes use of the CSS modulation technique, which is ...
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creating range map doppler
I'm trying to create a range doppler map for a chirp signal which has the following parameters:
pri = 5e-6;
pw = 2e-6;
CPI = 0.5e-3;
B = 100e6;
f_c = 40e9;
for one ...
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Signal Detection in Noise
I have known pulses, e.g. $A\exp(-\frac{t}{\tau})\cos(\omega t)$, but they are "hidden" in additive (let's say Gaussian) noise and it is not possible to predict when such events will occur. ...
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LabVIEW Driver for Princeton Applied Research 5302 Lock-In Amplifier
I'm working in a lab that uses a Princeton Applied Research 5302 Lock-In amplifier. The device has a GPIB port, and I wanted to interface the device with LabView. Does anyone know where to get a ...
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Can Autocorrelation be used to Differentiate Signal Quality (High, Medium, Low, Very Low) for Periodic Signals?
I'm working on a project to classify the quality of periodic signals into four categories: high, medium, low, and very low (noisy). I was initially exploring autocorrelation as a potential feature for ...
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How can I calculate the probability of detection and false alarm rate of a correlation result assuming a given SNR threshold in AWGN?
I am transmitting an LFM chirp with fixed bandwidth $B$ and sample rate $f_{s}$, containing $N$ samples. The chirp is windowed with a Kaiser window, which generally has constant $\beta$ but can vary. ...
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Algorithms for signal shape detection
I have a discrete signal shape which I am trying to find in accelerometer data. I want to compare at least two methods. First one is of course correlation, I calculate peak value of 10 experiments ...
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Excitation signals for system identification - Applications
I have a practical question regarding the various applications of excitation signals in identifying Linear Time-Invariant (LTI) systems. Specifically, I am curious about the usage of the following ...
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Why is my target showing up with a non-zero centered velocity? I captured this data using the IWR6843A0P using a stationary corner reflector
I need help understanding what I should do to determine why my target is showing up in my Range doppler map with a non-zero centered velocity when I captured my measurement using a stationary corner ...
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Program to compare output and input streams to verify volume
I'm trying to wright a program to compare, two sound signals, output (speakers) and input (mic) streams and verify/adjust the volume. I'm using Microsoft Visual Studio C# forms project with the ...
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Is this better detection and Gaussian noise cancellation technique than Matched Filter
The code below generates one sinusoid and considered as known signal. One needs to find the location of the signals under additive Gaussian noise.
The known signals is comprise of the sinusoids with ...
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How to distinguish a good sine wave from a distorted one from a solenoid signal?
I have a rotating magnet in front of an iron-core solenoid. When the magnet rotates, it would reduce speed, and then it will stop spinning and just sway back and forth. I want to know when it stops ...
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Complex Gaussian distribution in snapshot model
In Chapter 5 of the Optimum Array Processing by Harry van Trees [1], the formula of the complex Gaussian distribution appears very different from the formula that is used elsewhere in the same book ...
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do closer peaks Leak more to each other (spectral leakage in FFT)
I am familiar with the spectral leakage problem in FFT due to a rectangle window for a sin signal giving two peaks that leak to each other. My question is will the leakage to the frequency bins near ...
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Calculation of a position from the angles of arrival
For locating a target by TDOA (Time Difference Of Arrival) with $3$ stations we have the Chan method which gives an exact solution of the position.
I keep the $3$ stations but instead of measuring the ...
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