Tool/software:
Dear Ti Group,
I am research the Vital signs with people tracking Demo, and I'm having the same issue as discussed in this forum: "e2e.ti.com/.../iwr6843aop-vital-signs-with-people-tracking-demo
Now, I want to modify the BPM mode to TDM mode, so the config param is modified as below:
chirpCfg 0 0 0 0 0 0 0 1
chirpCfg 1 1 0 0 0 0 0 2
chirpCfg 2 2 0 0 0 0 0 4
fineMotionCfg -1 1
bpmCfg -1 0 0 0
I found that the BPM processing logic related to HR/BR calculation in the source code you gave is as follow,is part of the code of the MmwDemo_vitalsignPickupPoint function
//de-modulation the BPM
//[0:3] TIM1, [4:7] TIM2, [8:11] TIM3 RX signals
//RADARDEMO_aoaEst2DCaponBF_bpmDemodulation
//AOP
// pData_temp[20].real = (pData_temp[0].real + pData_temp[8].real)/2;
// pData_temp[20].imag = (pData_temp[0].imag + pData_temp[8].imag)/2;
// pData_temp[21].real = (pData_temp[1].real + pData_temp[9].real)/(-2); //phase rotation
// pData_temp[21].imag = (pData_temp[1].imag + pData_temp[9].imag)/(-2);
// pData_temp[22].real = (pData_temp[2].real + pData_temp[10].real)/2;
// pData_temp[22].imag = (pData_temp[2].imag + pData_temp[10].imag)/2;
// pData_temp[23].real = (pData_temp[3].real + pData_temp[11].real)/(-2);
// pData_temp[23].imag = (pData_temp[3].imag + pData_temp[11].imag)/(-2);
//
// pData_temp[24].real = (pData_temp[4].real);
// pData_temp[24].imag = (pData_temp[4].imag);
// pData_temp[25].real = (pData_temp[5].real)*(-1); //phase rotation
// pData_temp[25].imag = (pData_temp[5].imag)*(-1);
// pData_temp[26].real = (pData_temp[6].real);
// pData_temp[26].imag = (pData_temp[6].imag);
// pData_temp[27].real = (pData_temp[7].real)*(-1);
// pData_temp[27].imag = (pData_temp[7].imag)*(-1);
//
// pData_temp[28].real = (pData_temp[0].real - pData_temp[8].real)/2;
// pData_temp[28].imag = (pData_temp[0].imag - pData_temp[8].imag)/2;
// pData_temp[29].real = (pData_temp[1].real - pData_temp[9].real)/(-2);
// pData_temp[29].imag = (pData_temp[1].imag - pData_temp[9].imag)/(-2);
// pData_temp[30].real = (pData_temp[2].real - pData_temp[10].real)/2;
// pData_temp[30].imag = (pData_temp[2].imag - pData_temp[10].imag)/2;
// pData_temp[31].real = (pData_temp[3].real - pData_temp[11].real)/(-2);
// pData_temp[31].imag = (pData_temp[3].imag - pData_temp[11].imag)/(-2);
if it is configured to TDM mode, I think it should be modified to the following,
pData_temp[20] = pData_temp[0];
pData_temp[21] = pData_temp[1];
pData_temp[22] = pData_temp[2];
pData_temp[23] = pData_temp[3];
pData_temp[24] = pData_temp[4];
pData_temp[25] = pData_temp[5];
pData_temp[26] = pData_temp[6];
pData_temp[27] = pData_temp[7];
pData_temp[28] = pData_temp[8];
pData_temp[29] = pData_temp[9];
pData_temp[30] = pData_temp[10];
pData_temp[31] = pData_temp[11];
That is, compared with the BPM processing logic in the source code, when TDM works in the working mode, the received 12 virtual channel data does not need to be processed, and can be used directly. I am not sure if my modification is correct, I hope to get your correction, thank you very much
