MMWAVE-STUDIO: How to prepare the angle grid for the RA plot or point-cloud?

Hi Palguna,

Which plot are you referring to?

Regards,

Samhitha

I am referring to the angle axis values in the in the Range-Angle plot and 3D scatter plot. 

The processed radar cube has three dimensions (range, velocity, angle). The range and velocity axis values I am able to set as given in the question. I am getting difficulty in preparing angle axis values because of the reasons told in the question

Hi. The Matlab examples doesn't give idea about how prepare Angle grid and they can only be followed upto the CFAR detection, the angle detection used the cascade chips and for the single chip AWR1843 device are told to be different.

I went to the link https://e2e.ti.com/support/sensors-group/sensors/f/sensors-forum/915894/iwr6843isk-what-to-indicate-by-range---azimuth-heat-map and understood how to prepare angle grid, but I have a doubt.

From module 5 in mmWave radar sensors  | TI.com the angle is more sensitive at lower angles and less sensitive at higher angles,

but when I used

theta = asind([-NUM_ANGLE_BINS/2+1 : NUM_ANGLE_BINS/2-1]'*(2/NUM_ANGLE_BINS));

I found that angle difference at the lower angles is less, more at the higher angles. which means angle is more sensitive at higher angles than lower angles. So somewhat confused. Do you have any explanation about it?

I know that. Let me clarify again 

I am asking why the theta values are not changing like the sine values. The sine values successive difference is more at lower values, less as it approaches 90 degrees, the theta should be like that also. But the formula in that post gives theta values I was asking about the theta values calculated using the formula given angle difference at the lower angles is less, more at the higher angles.? Whay is this I am asking.