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# Tag Info

Accepted

### Intuitive interpretation of Fourier transform in beamforming

The equations relate to how the directivity of a uniformly spaced linear array of sensors works. Let's start with an array: where $\theta$ is our "look" direction (where we want to steer the array), ...
• 25.8k
Accepted

### Can a narrowband beamformer be used for speech separation

If you are dealing with say 8 kHz for a nominal speech bandwidth of of 4kHz i.e. 0 Hz - 4 kHz, then the speech is essentially a wideband signal. Therefore narrowband beamforming won't work very well. ...
• 2,871

### beam pattern are fourier transform of the beam weight, is it true ? if it's true how?

I'll work out some math that should hopefully capture the gist of the derivation of why the DFT can be used. The magnitude squared of the array factor is the beampattern for an array of isotropically ...
• 1,040
Accepted

### Plotting beam pattern of uniform linear array

You are pretty close, just a few cosmetics will get you there. Your angle resolution isn't quite high enough to hit all the narrow dips in the polar pattern. I increased it to 1000 points. You need ...
• 45.3k
Accepted

### Is there an intuitive explanation for how adaptive beamformers work?

A basic two-element array suffices to explain the general case. Also, the receiving behaviour is the reciprocal of that of the transmitting. Consider two receivers separated by $d$. A plane harmonic (...
• 28.3k
Accepted

### Beamforming using MATLAB

In MATLAB the default direction of orientation of Planar array is y axis, which can be seen as ...
• 386

### DSP with 8+ inputs for simple beamforming

8+ high quality inputs for beamfroming and "...beginner friendly..." are competing requirements. There will soon be the audioinjector which attaches on Raspberry Pi and would be a relatively ...
• 10.7k

### Can a narrowband beamformer be used for speech separation

The work by Darren Ward, Rod Kennedy, and Bob Williamson investigated how to design filters applied to a delay-and-sum beamformer that allowed broadband signal acquisition. As you can see from their ...
• 25.8k

• 90.3k

### Is there a way to get the "mode" of several recordings? (to remove 1-off noise)

Problem Statement It sounds like you are trying to solve the Cocktail Party Problem, which is to separate different signals (e.g., multiple people speaking simultaneously at a party) that have been ...
• 1,797
Accepted

### Narrowband DOA Beamforming techniques on Wideband signal

My suspicion is that you can only perform phase shift beamforming techniques on narrowband signals and will not work even if you are looking for a narrowband within a wideband signal. Am I correct? ...
• 31.1k
Accepted

### Which parameters defines a polar plot?

Some examples would be the null to null bandwidth(s) as well as the sidelobe levels of the first/second sidelobes. Example vector of 5 numbers: [mainlobe gain, first null location, 1st sidelobe gain,...
• 2,222