pos argument in steervec function

Question

Orr Streicher 2021-2-3

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/734687-pos-argument-in-steervec-function

回答： Shiva Kalyan Diwakaruni 2021-2-10

Hi,

I would like to create a steering vector using steervec function.

As far as i understand from the documentation the argument "pos" specifies the positions of the sensor array elements while i should define sensor position units in term of signal wavelength.

Here is an example from the documentatin:

elementPos = (0:.1:.4);

c = physconst('LightSpeed');

fc = 1e9;

lam = c/fc;

ang = [45;0];

sv = steervec(elementPos/lam,ang,3)

Now, I would like to create a stering vector based on speech signal with sampling freqency of fs=48000 [Hz].

Should fc in this case be equeal to fs?

This is what i tried to do , but im not sure if its right:

elementPos = [0,0,0; -0.03,0,0; 0,-0.03,0; -0.03,-0.03,0; 0,-0.09,0; -0.03,-0.09,0 ];

elementPos=elementPos.';

c = physconst('LightSpeed');

fc = sig_Fs;

lam = c/fc;

azang=[ 60, 120, 0, 180, -60, -120];

elevation_const=30;

ang=[azang;elevation_const*ones(1,length(azang))];

d = steervec(elementPos/lam,ang);

Thanks!

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Answer 1

Shiva Kalyan Diwakaruni 2021-2-10

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/734687-pos-argument-in-steervec-function#answer_619757

Hi,

As you are trying to create a steering vector based on speech signal .Hence here incoming signal being speech signal with frequency 48000 HZ , the fc in this case is equal to fs and the remaining code being the same from the documentation except for the change in values of azimuth and elevation angles , the code looks fine.

thanks.