Question


index assignment in matrix.
T(8x2000) matrix, in(8x6500) matrix. I have the following for applying delays in matrix 'T' into a signal in matrix 'in'(each...

12 years ago | 1 answer | 0

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answer

Question


Delay using FFT
I have the following code to acurately implement time delay in any signal(wideband) in frequency domain by using the efficiency ...

12 years ago | 2 answers | 0

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answers

Question


3dB beamwidth from matrix
I have a matrix H(360x180) containing the energy levels in dB. I have the following 3D-beampattern plotted from H: http://i4...

12 years ago | 2 answers | 0

2

answers

Question


maxIntensity of image/matrix and ratio
I have a matrix H(360x180). My final goal is to find the ratio of second max peak to max peak in the matrix. I have done the ...

12 years ago | 2 answers | 0

2

answers

Question


finding first and second maximum in an image/matrix
Hello, I have a 360x180 matrix. It has the normalised energy values in dB representing the beam pattern of microphone array i...

12 years ago | 1 answer | 0

1

answer

Question


Beamforming for source localization
I have a situation: I have carried out Delay & Sum Beamforming for my 3D microphone array geometry containing 8 mics (nearfie...

12 years ago | 0 answers | 0

0

answers

Question


LPF a random signal
I have a random signal and its psd: x=randn(1000,1); Fs=4000; pd = psd(spectrum.periodogram,u,'Fs',Fs); plot(pd) ...

12 years ago | 1 answer | 0

1

answer

Question


scale polar plot
Hello, I have a set of Gain values (in dB) stored in row vector G(1x360). When I plot G using the function polar((...

12 years ago | 2 answers | 0

2

answers

Question


plotting energy as a function of angles
Hello, Iam dealing with beamforming using 3D microphone array. I have a matrix M (360 x 501) containing the energies(in dB...

12 years ago | 1 answer | 0

1

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Question


adding rows and storing into a matrix
Hello, I have a matrix M of size 2880x501 containing 2880 rows. I want to select the first eight rows and all columns [that...

12 years ago | 1 answer | 0

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Question


matrix repetition
Hello, I have a matrix M of dimensions (m by n). I want to repeat this matrix 'k' number of times along the column. For exampl...

12 years ago | 2 answers | 0

2

answers

Question


power of beamformed signals
Hello, I have a random signal 'x' of matrix dimensions 100x5000 i.e. I have 100 signals of 5000 samples each with fs=1000. I w...

12 years ago | 2 answers | 0

2

answers

Question


finding maximum in a row and subtracting.
I have a matrix: t=[2,3,8,6;44,56,6,77;74,23,45,67;12,34,45,23]; I want to find the maximum value from each row,subtract...

12 years ago | 1 answer | 0

1

answer

Question


error: Subscripted assignment dimension mismatch
I have this function to delay signals in freq. domain: function [sd, tn] = df(s,fs,d,ns) % Get signal processing parame...

12 years ago | 1 answer | 0

1

answer

Question


Directivity pattern for a beamformed signal
Finally, I got a signal y(1x5001) (delayed and summed output of the microphones). How can I plot the directivity pattern(mesh...

12 years ago | 1 answer | 0

1

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Question


3D plot
Antenna_X_Pos=[-0.0012;0.1419;-0.0672;-0.1121;0.1173;0.0653;-0.1458;0]; Antenna_Y_Pos=[0.1495;-0.0374;-0.1328;0.0896;0.0880;...

12 years ago | 1 answer | 0

1

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Question


TRANSLATION OF COORDINATE AXES
Antenna_X_Pos=[-0.0025; 0.1406; -0.0685;-0.1134;0.1160;0.0640;-0.1471;-0.0013]; Antenna_Y_Pos=[0.0546;-0.1323;-0.2277;-0....

12 years ago | 1 answer | 0

1

answer

Question


beamforming a signal with random noise
This is my code for beamforming: close all clear all clc m = 8; signal=(sin(20* pi/180)); ad = exp (-1j * pi *[0...

12 years ago | 3 answers | 0

3

answers

Question


delay and sum beamforming(in frequency domain)
I have 8 microphones (excluding the origin[0;0]) arranged in circular geometry. And I have a sound source placed at a certain lo...

12 years ago | 2 answers | 0

2

answers

Question


matrix columnwise subtraction
I have the following matrix: [ 1 2 3 1 3 4 4 5 6] I need: [ 0 -1 -2 0 -2 -3 0 -1 -2] How can I do it?

12 years ago | 1 answer | 0

1

answer

Question


fractional delay using FFT,IFFT
Hello, I have been working on delaying any given signal with subsample accuracy (fractional+interger) delay in Frequency domain ...

12 years ago | 3 answers | 0

3

answers