Radar sensor Forum Discussions

[lalit]

I am using Radar Fusion GUI for BGT60LTR11AIP. How can I export Frequency Spectrum? 

[Siddharth]

Hi @lalit ,

You cannot export the frequency spectrum form Fusion GUI, you can only extract the raw data. You can build your own algorithm that applies FFT to generate frequency spectrum from the raw data.

Moreover you can access target detection signal amplitude from RDK advanced_motion_sensing app.

Thankyou, Siddharth.

[lalit]

Hi Siddharth,

can you explain the what kind of raw data it is exporting? 

Thanks !

[Siddharth]

Hello @lalit ,

The data you see there are normalised ADC values of I and Q channels, the same data which you see in the time domain plot (Figure below).

The recorded raw data has alternate I and Q ADC samples (see figure below), please go to Radar Fusion GUI->Help-> Help contents->6.5 Recording Data Formats to know better.

Thank you,

Siddharth

[lalit]

Hi Siddharth, 

Could you suggest what kind of algorithm that applies FFT to generate frequency spectrum from the raw data. Also is it possible to generate frequency spectrum in Matlab ?

Thanks !

Lalit 

[Siddharth]

Hey @lalit ,

You can also go through the example code that parses and process BGT6011LTR11AIP recorded data. You can find this code in the RDK ( path mentioned below)

Radar Development Kit\3.3.1.202211181510\assets\software\radar_sdk\radar_sdk\tools\ltr11-recording-matlab-parser 

If you don't have RDK, you can download it from Infineon developer center.

Thankyou, Siddharth.

[Siddharth]

Hello @lalit ,

You can use  N-point FFT padded with zeros, fft(X,N) matlab function gets this job done. 

Thankyou, Siddharth

[lalit]

Hi Siddharth,

Thanks for your prompt help ! 

I have one more question regarding frequency spectrum.

There is a option to change the FFT magnitude to Linear and Log [dB]. See the attached image. Is it also possible to convert the FFT magnitude to Linear same like Radar Fusion GUI. How can I convert it to linear in Matlab.

Thanks !

Lalit 

[Siddharth]

Hello @lalit ,

You can use the formulae Linear scale=10^(dB/20), see the formula below.

Here, a is the linear value and x[db] is your Log [dB] value.

Thankyou, Siddharth.

[lalit]

Hi Siddharth,

Thanks for the detailed explanation. 
In our case we want to monitor respiratory rate do you have any applications/algorithms to detect respiratory rate. 

Thanks! Lalit

[Siddharth]

Hi @lalit ,

Algorithm to measure the vitals signs like respiratory rate and heart rate are still under development and aren't currently available. Once the development and fine tuning of the algorithms is done, it will be released to the public. Also please note that this algorithm will be supported only by BGT60TR13C and not BGT60LTR11AIP.

Thankyou,

Siddharth

[lalit]

Hi Siddharth, can we connect Bluetooth module in BGT6011LTR11AIP to obtain wireless data? Thanks! 

[Siddharth]

Hi @lalit ,

BGT60LTR11AIP doesn't have a bluetooth module inbuilt, but you can use a bluetooth enabled MCU module to read the TD and PD pins to sense presence and movement direction. 

Thankyou, Siddharth.

[lalit]

Hi @Siddharth could you please share the website link (with proper MCU module) where I can purchase it.

Thanks!

[Siddharth]

Hi @lalit ,

Sure, you can use our PSoC Bluetooth enabled MCUs like CY8CPROTO-063-BLE or CY8CPROTO-062-4343W based on your use case. Or, if you wish to go with commonly used bluetooth MCUs you may do so like in this video.

Thankyou, Siddharth.

[lalit]

Hi @Siddharth 

I also want to buy a longer length power cable (5 meter) for BGT60LTR11AIP. Could you suggest what kind of cable I have to purchase?

Thanks ! 

[Siddharth]

Hi @lalit ,

You should use a USB 2.0 A-Male to USB Micro-B Cable, note that USB 2.0 specification limits the length of a cable between USB 2.0 devices to 5 meters.

Thankyou, Siddharth.

[lalit]

Please send a online link about the cable. Thanks! 

See this is the right one? 
https://www.bol.com/nl/nl/p/usb-micro-kabel-2-0-zwart-5-meter-allteq/9300000007444646/?Referrer=ADVN...

[lalit]

See this is the right one? 
https://www.bol.com/nl/nl/p/usb-micro-kabel-2-0-zwart-5-meter-allteq/9300000007444646/?Referrer=ADVN...

[Siddharth]

Hi @lalit ,

Yes this should work, you can go for it.

Thankyou, Siddharth.