Why OFDM subcarriers are orthogonal — the math behind the “O”
OFDM subcarriers are orthogonal over a symbol period; how that yields independent flat bins after the DFT, and how CP protects that orthogonality.
OFDM
5G NR resource block (PRB): definition, grid, and bandwidth by numerology
What a 5G NR physical resource block is (12 subcarriers), how it sits in the frame/slot grid, PRB bandwidth vs numerology μ, Python, and links to BWP and OFDM tools.
OFDM cyclic prefix length — how long must the CP be? (Matlab demo)
How long should the OFDM cyclic prefix be? CP must cover the channel delay spread so the FFT sees circular convolution — Matlab hands-on plus overhead calculator.
OFDM BER vs Eb/N0 in Matlab — cyclic-prefixed MPSK/MQAM in AWGN
OFDM BER simulation vs Eb/N0 in Matlab with cyclic prefix: MPSK/MQAM on subcarriers in AWGN, and how results compare to single-carrier theory.
OFDM with the IFFT — mapping constellation symbols onto orthogonal subcarriers
OFDM part 3: packing QAM symbols onto subcarriers, IFFT to time domain, and how this builds the multicarrier waveform.
Introduction to OFDM — multicarrier idea, FDM vs OFDM, and the five-lesson path
OFDM study path — 5 lessons (same on every page in this series) 1. Introduction (you are here) → 2. Orthogonality → 3. IFFT modem → 4. Cyclic prefix → 5. BER in AWGN Tools: OFDM CP overhead calculator · Eb/N0 ↔ SNR converter In one sentence: OFDM shares bandwidth among many tightly spaced carriers … Read more