Increase FFT size to 16384 on RFSoC 4x2

[Kapish26]

Dear @dnorthcote / @LewisMcL / @lbrown65 ,

I'm working on developing a spectrum analyzer using the RFSoC 4x2 board in conjunction with MATLAB. I'm aiming to increase the FFT size to 16384 samples for improved frequency resolution, but the current maximum in my implementation is 8192.

Specific questions:

1. Feasibility: Is it technically possible to achieve an FFT size of 16384 on the RFSoC 4x2 using the available MATLAB IP? Are there any hardware or software limitations to consider?
2. Approach: If feasible, could you please guide me on the steps or modifications I need to make to my current implementation to achieve this 16384 FFT size? Are there specific code changes, configuration adjustments, or alternative IP blocks I should explore?
3. MATLAB IP: If you're familiar with suitable MATLAB IP options for this purpose, any recommendations or insights would be greatly appreciated.