Questions tagged [localization]

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Range estimation based on distance differences

It is a range estimation problem, as shown in the figure. The blue circles are the anchor node' positions, which are produced by one moving anchor (the moving direction is shown with black arrow). ...
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10 views

Calculating the Channel state information for localization

I want to build a localization system using 4G LTE for a project. Intuitively, I can get the position measuring the time a signal leaves the Base Station to the User Equipment. Knowing that these ...
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1answer
46 views

Cramér-Rao lower bound

I have been trying to implement the Cramér-Rao lower bound from the paper - A reference-free time difference of arrival source localization using a passive sensor array (eq. 6 and eq. 7). $$ \...
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1answer
566 views

Sound Source Location

I have four microphones which I want to use to locate the direction of an audio source. Is there any Python module that implements an algorithm that, given the recordings of the four microphones, will ...
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1answer
36 views

What are the most robust implementations of passive/self-localization assuming high noise and reverberation?

I am doing research on a related subject that requires the use of TDOA estimation of two signals in an environment with a great deal of noise and reverberation. If anyone had any expertise on (or ...
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0answers
81 views

Subtracting audio signal emitted - trying to use spectral subtraction to localize moving objects

I am a Software Engineer without much signal processing background and currently spending and experimenting to get use to it. My scenario: Assume a speaker and a microphone array. A speaker emits an ...
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2answers
233 views

DOA - 1D Music Algorithm

I am currently working on a MUSIC algorithm for DOA of RF emitters in 3D. At the first stage, interested to apply the 1D MUSIC using a linear array of 4 antennas, and estimate only the azimuth of the ...
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111 views

Multilateration of Sound in 3D Space

TL:DR - How can you find the 3D coordinates of a emitter than transmits an impulse signal? STORY: I'm working on something to improve my bird-watching. I've got a camera that can take pictures of ...
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1answer
140 views

sound source localization - finding source vector

This may sound a stupid question - but I am working on some simple microphone array beamforming sound source localization stuff. I think I understand how to use beamforming to find the TOA of the ...
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1answer
94 views

Line based Extended Kalman Filter for localization : Measurement Jacobian

I have to estimate location w.r.t a given map of the environment. The state is expressed as $ X = \begin{bmatrix} x \\ y \\ \theta \end{bmatrix}$ Given , $ X_{t-1} = \begin{bmatrix} x_{t-1} \\ y_{...
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1answer
810 views

Delay-and-sum beamforming: implementing steering in C

I am currently trying to understand how delay-and-sum beamforming works. I have found this website which explains the process of this technique very well in which the following C code is provided: <...
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1answer
196 views

Audio localization accuracy with two microphones

I am attempting to find the location of sound using two microphones, using cross-correlation methods. I am not getting very consistent and accurate results, there are instances where there seem to be ...
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2answers
389 views

Understanding the constraint on distance between microphones in microphone array for Direction of Arrival estimation

The distance between microphones in a two-microphone array for direction of arrival estimation, should be at least less than half of the wavelength of the signal that is being detected by the ...
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201 views

How to convert magnetometer readings into orientation?

I have a magnetometer sensor, obtaining the reading with $50$Hz rate. Unfortunately, the data is not labeled: I just know that these are $x$,$y$,$z$ axes, and that the reading are in $\mu$T (micro ...
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111 views

Object localization down to the pixel

I am somewhat confused on the terminology used in Computer Vision. Suppose I wanted to detect (localize) an object (say, a human) in an image. However, a box around the human is not sufficient, what I ...
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1answer
500 views

Cross-Correlation Signal Delay Estimation Variance

I am working on a project which intends to use Time Difference of Arrival (TDoA) for localization. Firstly, my understanding is that a matched filter is the most common method for estimating signal-...