# Wi-Fi

# Video links

## YouTube video links

- [Mobile Standards Evolution: FDMA, TDMA (3G), CDMA, OFDMA](https://www.youtube.com/watch?v=bm53RpK-S2k)
- [802.11ac MU-MIMO](https://www.youtube.com/watch?v=0fpyfPUyfic)
- [OFDMA vs. MU-MIMO in Wi-Fi 6](https://www.youtube.com/watch?v=jU_hacMiUAc)

## 2G vs 3G vs 4G vs 5G  


[![image.png](https://bookstack.bluecrow.net/uploads/images/gallery/2023-05/scaled-1680-/image.png)](https://rantcell.com/comparison-of-2g-3g-4g-5g.html)

<table id="bkmrk-generation-technolog"><thead><tr><th class="has-text-align-left" data-align="left">Generation</th><th class="has-text-align-left" data-align="left">Technology standard</th><th class="has-text-align-left" data-align="left">Radio access technology</th></tr></thead><tbody><tr><td class="has-text-align-left" data-align="left">1G – First Generation</td><td class="has-text-align-left" data-align="left">AMPS, NMT, TACS, J-TACS, C-Netz</td><td class="has-text-align-left" data-align="left">FDMA</td></tr><tr><td class="has-text-align-left" data-align="left">2G – Second Generation</td><td class="has-text-align-left" data-align="left">GSM, D-AMPS, IS-95</td><td class="has-text-align-left" data-align="left">Combination of TDMA &amp; FDMA, and Narrowband CDMA</td></tr><tr><td class="has-text-align-left" data-align="left">3G – Third Generation</td><td class="has-text-align-left" data-align="left">UMTS (WCDMA) and CDMA2000</td><td class="has-text-align-left" data-align="left">Wideband CDMA and Narrowband CDMA</td></tr><tr><td class="has-text-align-left" data-align="left">4G – Fourth Generation</td><td class="has-text-align-left" data-align="left">LTE (Long Term Evolution)</td><td class="has-text-align-left" data-align="left">OFDMA and SC-FDMA</td></tr><tr><td class="has-text-align-left" data-align="left">5G – Fifth Generation</td><td class="has-text-align-left" data-align="left">NR (New Radio)</td><td class="has-text-align-left" data-align="left">OFDMA</td></tr></tbody></table>

**—Technologies used by 1G, 2G, 3G, 4G and 5G—**

[![image.png](https://bookstack.bluecrow.net/uploads/images/gallery/2023-05/scaled-1680-/PGPimage.png)](https://commsbrief.com/what-do-the-terms-1g-2g-3g-4g-and-5g-really-mean/)