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Questions tagged [signal-identification]

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Wireless Communication: detecting if a bit 0 changed to 1

I am new in wireless communication, and now I have a 0/1 string like 0010000 (only one bit 1) and wanna send it to the receiver wirelessly. Am I able to detect if the receiver get this string ...
yao zhao's user avatar
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0 answers
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Close embedding similarity issue in Korean speaker verification using X-vector

I'm working on a speaker verification system using X-vector on Korean speakers' data. On unseen data, the system achieves fairly good EER (from 10% to 20%), but I'm encountering a challenge with close ...
Luka Nguyen's user avatar
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Modelling problem

Considering a finite-length impulse response $h[n]$ of length $M $ (which amounts to considering $h[n] = 0,$ for $n \geq M$). The data model, with additive disturbance, is then written as: $$y[n] = ...
Jacob's user avatar
  • 1
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Is this a FSK signal?

I captured a signal on 433 MHz but I'm not able to build a functioning decoder for it. Is the transmitter using FSK to modulate the signal? Sample: https://ufile.io/w9vismfu (250k, unsigned 8-bit IQ)
Jonas's user avatar
  • 101
1 vote
1 answer
53 views

Friendly target identification in radar

How do radar systems identify friendly targets to avoid AA locks during combat scenarios? Do friendly planes broadcast a known signal or is something else going on?
FourierFlux's user avatar
1 vote
0 answers
43 views

Alone MFCC can identify difference between sound?

I am doing a project to identify different drum beats. There are lots of features like MFCC, Chroma Values, Spectral Bandwidth, Spectral Centroid, Zero Crossing Rate, etc. But most of the projects are ...
Asiri Amal's user avatar
1 vote
0 answers
36 views

How to classify overlapped signals?

A known signal, signal 1 got overlapped with an unknown signal. Likewise, signal 2 overlapped with another unknown signal. The problem I face now is how to classify the overlapped signals based on the ...
user41581's user avatar
3 votes
1 answer
959 views

identification of sounds within audio signals

I am looking for methods to identify sounds within audio files. I was hoping to find some ready-made user-friendly software to do this but haven't found it yet. I am familiar with Matlab and some C++...
perigalacticon's user avatar
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1 answer
1k views

Is this waterfall characteristic of QAM or OFDM (or something other) modulation?

I recorded this signal at 2.45GHz, it is coming from a camera. Is this QAM or OFDM ? Based on those side-lobes I would guess OFDM but I am not sure. Also there seems to be an interesting preamble ...
jhegedus's user avatar
  • 247
6 votes
1 answer
2k views

How to measure/estimate symbol rate of a signal with unknown ( but probably QAM ) modulation?

Is it possible to estimate the symbol rate of a signal whose modulation is not know exactly but it can only be guessed that it is probably some kind of QAM (probably 64 or 256). What is the best way ...
jhegedus's user avatar
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