Signal Processing Stack Exchange
Signal Processing Stack Exchange

Questions tagged [doa]

10 questions
4
votes
1 answer

MUSIC algorithm terminology

Looking for clarification on the notation described in the MUSIC algorithm in Ralph Schmidt's IEEE paper$^{[1]}$. The data model is: $$X = AF + W$$ Schmidt defines the following: X = received signal for each array element A = steering vector F =…
BigBrownBear00
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3
votes
0 answers

Direction-of-Arrival estimates clustered at specific angles

I am having an issue which I cannot understand completely. I am working on a simple project where I am testing various algorithms from the family of the Generalised Cross Correlation [GCC] for Direction-of-Arrival [DoA] estimation (actually it's…
ZaellixA
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2
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0 answers

Compressed Sensing in DOA processing

I'm trying to apply the compressed sensing theory (CoSaMP algorithm) to the DOA estimation in FMCW ULA (made of 48 elements). In the dechirped signals processing I use a first FFT to solve the range and then instead to apply another FFT along the…
Luca R
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1
vote
1 answer

Understanding GCC-PHAT as a Feature

I'm working on a sound source localization project and am interested in using GCC-PHAT as a feature. I'm quite new to this transformation and I've been reading a few papers about it and I'm still struggling with understanding what it actually is.…
user25758
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1
vote
1 answer

DOA for bistatic radar

Consider a circular antenna array (UCA) with $N$ antenna elements as part of the CW bistatic radar system. For each element we receive a signal of length $L$: $x_n[k]$, $k=1...L$, $n = 1...N$. Оne of the antenna elements is directed towards the…
Alexey K
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1
vote
0 answers

MUSIC algorithm for DOA with floating point input signals

I am writing a Direction of Arrival (DOA) estimator using the MUSIC algorithm in python and am having trouble getting the correct spectrogram output. Specifically, my resulting graph comes out aliased as such: On the left is the SYNTHESIZED signal,…
Felkin
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1
vote
1 answer

How does one calculate a steering matrix for DOA given real data and only antenna positions

I am currently trying to implement the MUSIC algorithm for a real dataset which captures a sound signal in a room using a cubic 8 sensor array setup. Every example I've found for the MUSIC algorithm talks about the steering matrix and calculates it…
Felkin
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1
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1 answer

Why in MuSiC (DoA) don't we search for minima of the inverse (pseudo)spectrum?

I have started working on a Direction-of-Arrival estimation problem and I am testing various algorithms. I came across Multiple Signal Classification (MuSiC) method. In all textbooks I have looked at, the final step of the method is to search for…
ZaellixA
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1
vote
0 answers

The estimation deviation in specific angles of Circular array DOA in circular harmonic domain

Recently, I study the MUSIC doa in the circular harmonic domain, but I found the estimation results always have a big bias in some specific angles(angles near to 0 or 180 degree), as showing in the Figure, I'm so confused because the estimation…
Jeff Wang
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0
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0 answers

Find similarities between 2 signals

Is there any heuristic method to find metrics, similarities between two signals? I am not talking about correlation.
Blobmou
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