MMWAVE-STUDIO: some Test Source questions

Hello Brian,
For the first question can you provide the range and velocity value of the "second" peak you see which is not expected?
or the second question the power level of the object seems too high, can you set a -10dBFS signal level to the objects and try?

Regards,
Vivek

Hello Vivek,

1.My object in the test source is at range 5m(X:4,Y:3) with speed 5m/s(X:4,Y:3), the peak at the range 5 velocity 5 is correct and has a higher FFT output(dB)

But i get another peak at range 5 velocity -1 since my max speed is approximate 6 based on max speed = 3.9mm(lambda)/(4*160ms(time between chirps))

as shown as the picture below

While I didn't change any settings except I shorten the Tc(time between chirps) to half from 160ms to 80ms, my result of max speed is calculated as 12(3.9mm/(4*80ms)) 

and I will see 2 peaks at range 5 speed 5(which is correct) and the other at range 5 speed -7

so i guess the second peak is related to the max speed but I don't know why this happens

the result is shown below

2. For my second question, I've change the signal level for both my test source objects to -10dB then  "Detection & Angle estimation Results" object numbers and "1D FFT amplitude profile" peaks are correct

but same as the question above i will get more than 1 peaks for each object and they are all related to my max speed

while my 2 objects are at range 5 speed 5, range 10 speed 0 and my max speed is 6, I get other peaks that supposed not to exist at range 5 speed -1, range 10 speed -6 and range 10 speed 6

the special part is while my speed is 0 i will get peaks at 0 speed ,max speed and -max speed at the same range but I only have 1 object.

the results are shown below

please help me figure out why the peaks i didn't expect appears ,thanks a lot

best regards