TI中文支持网Part Number:IWR1443
我看手册上说，1443通过硬件加速器做FFT，一次可以做1024点的FFT。
有一个lab程序里是将4096点的fft分成两次做实现4096点FFT
然后就没有更高点数的FFT了，请问1443是最多只能做4096点的FFT么，如果是那为什么。
Shine：
请看下面帖子的回复。
The only existing stitching algorithm is the 4K FFT software which is for IWR1443 and leverages the HWA. The reason we have to do FFT stitching for 4K point FFT is that the maximum FFT size supported on the HWA is 2048.
If customer wants to perform the FFT to the DSP, then they are not limited to 2K point FFT and using the FFT functions in DSPLIB they can perform 32 k point FFT. What is the reason the customer wants to use FFT stitching of smaller sized FFTs rather than a single large 32k FFT?
Also as a side note if the main motivation of doing a higher-point FFT is to obtain better accuracy, then there might be more efficient methods to achieve this e.g. Interpolation, Chirp Z-transform etc.
https://e2e.ti.com/support/sensors-group/sensors/f/sensors-forum/1023257/iwr6843-how-to-implement-large-size-fft
