I have OFDM research experiences for many years as I worked for my Ph.D.
There are two major solutions for OFDM system: coherent and direct detection. Also, there are many methods for PAPR reduction: clipping, clipping filtering, msnt, l2by3, etc.
Solution:
1. generate bit steam
2. mapping to symbol: qpsk, m-qam
3. pre-coding for papr reduction if it is neccessary
4. serial to parallel
5. IFFT
6. P/S
7. add CP
8. clipping for papr reduction if it is neccessary
9. Rx., AGC, sync
10. remove CP
11. S/P
12. FFT, channel estimation & equalization
13. P/S
14. de-coding
15. de-mapping
16. BER & MSE & EVM calc
FEC is not included in this project.