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Hello, the paper does not explain why they subtract DC component before FFT. I did some online reading, here is what I found - subtracting DC/mean in spatial domain before FFT is the same as zero out the bin 0 at frequency domain. The former does take more computation time compared to the...
I read this and follow the steps https://ieeexplore.ieee.org/document/8124445. Someone told me to not subtract DC component prior to FFT as well just remove/do not care about the bin 0 (DC component) after FFT.
Hello, I am using Arm-Cortex M3 Microcontroller and CMSIS for FFT, my microcontroller does not support floating point unit therefore I have to use fixed point (Q15 or Q31) for calculation.
Before calculate FFT, I need to apply hanning window on to my data collected from ADC 12-bit (0-4095). My...
Hello all, Could anyone give advice on how to reduce/eliminate false positive during medium/heavy rain? Currently, my radar system is capable of working in light rainy/sunny day without false positive.
Current, program flow -> ADC -> FFT -> speed.
Note - This is not FMCW radar.
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