MMWAVE-STUDIO: Incorrect range resolution displayed by Post processing window?

Hello Asher,

Here is the formula GUI uses

lightSpeed = 3e8; %m /s
over_samp_factor = 1;
fft_size1D = Samples_Per_Chirp*over_samp_factor;

range_resolution = (sampling_rate_ksps*1e3)/fft_size1D*(lightSpeed/2/(slope_Mhz_per_us*1e12));

sampling_rate_ksps and slope_Mhz_per_us is from mmwave sensor configuration.

 Regards,

JG

Hello Asher,

PostProc tool is provided to do the processing of capture ADC data from mmwave studio. There is no documentation to explain this info in detail.

You can find all the fundamental formula related to mmwave sensor here -https://www.ti.com/lit/wp/spyy005a/spyy005a.pdf

Regards,

Jitendra

Hello Asher,

Here is the velocity resolution fromula this tool uses.

% Range Resolution, Velocity resolution

fft_size2D = Chirps_Per_Frame; chirp_active_time_secs = Samples_Per_Chirp/(sampling_rate_ksps*1e3); 

start_freq_actual_hz = (start_freq_ghz*1e9) + (adc_start_time_us*slope_Mhz_per_us*1e6); 

stop_freq_actual_hz = start_freq_actual_hz + (chirp_active_time_secs*slope_Mhz_per_us*1e12); 

chirp_rate_Hz = 1/(chirp_duration_us*1e-6);

centerLambda = lightSpeed/((start_freq_actual_hz + stop_freq_actual_hz)/2);

range_resolution = (sampling_rate_ksps*1e3)/fft_size1D*(lightSpeed/2/(slope_Mhz_per_us*1e12));

vel_resolution = (chirp_rate_Hz/fft_size2D)*centerLambda/2;

Regards,

Jitendra