khaebler
Newbie level 3
I'm building an N=8192 input FFT with 8 channels in Matlab (later to be implemented on FPGA) and I'm having problems with how the Twiddle Factors should look like. The basic structure of the FFT I learned from a YouTube video, and the signal flow picture is attached here for N=8.
I implemented the above structure in Matlab and it works for N=8 data points, but as I increase N it no longer works. I suspect that it has something to do with the Twiddle Factors.
How do the Twiddle Factors change after each iteration of inputs? I assume they are exponentiated by a factor of 8 after each iteration. Or is there more to keep into account? I've made a signal flow diagram for my (not fully working) code in Matlab
Any advice is greatly appreciated
I implemented the above structure in Matlab and it works for N=8 data points, but as I increase N it no longer works. I suspect that it has something to do with the Twiddle Factors.
How do the Twiddle Factors change after each iteration of inputs? I assume they are exponentiated by a factor of 8 after each iteration. Or is there more to keep into account? I've made a signal flow diagram for my (not fully working) code in Matlab
Any advice is greatly appreciated