802 11 PHY
- Architecture
- PLCP
- PPDU(PLCP Protocol Data Unit)/PSDU(PLCP Service Data Unit)
- CCA(Clear Channel Assessment)
- 802.11n Protection mechanism/signal structure
- PMD
- ISM(Industrial, Scientific and Medical) bands
- UNII(Unlicensed National Information Infrastructure) bands
- Transmit Spectral Mask
- channel scheme
- 2.4 GHz channel scheme
- 5GHz channel scheme
- PHY
- DSSS(direct sequence spread spectrum)(802.11/b/g)
- Barker sequence(802.11)
- CCK(Complementary Code Keying)(802.11b/g)
- OFDM(802.11a/g/n)
- STBC(Space-time Block Codes)
- Regulatory Domains
Band | Freq. Range | Bandwidth | Max Power | Max EIRP |
---|---|---|---|---|
ISM-900 | 902-928 MHz | 26 MHz | 1 Watt | 4 Watt (+36 dBm) |
ISM-2400 | 2400-2483.5 MHz | 83.5 MHz | 1 Watt | 4 Watt (+36 dBm) for PtMP, 200 mW for PtP) |
ISM-5800 | 5725-5850 MHz | 125 MHz | 1 Watt | 200 mW (+53 dBm) |
- ITU-R ISM band
- Rate Adaptation Algorithm
- The rate adaptation function is performed at the sender.
- The success and failure history
- For every 2nd ACK miss( transmission failure) following good transmission, fallback to lower rate and set a timer. Whenever the consecutive 10 good transmission or timer expired, upgrade to higher rate. Then, if miss ACK, fallback to lower rate.
- ARF(Auto Rate Fall-back)
- Agilent - RF Testing of WLAN Products
- Wireless LAN產品的RF測試
- 使用 Agilent N8300A 進行 IEEE 802.11a/b/g/n 製造測試
- TV White Space
page revision: 128, last edited: 17 Sep 2012 03:24