WiFi abbreviations
From Teknologisk videncenter
Abbreviations
| Abb. | meaning | Notes |
|---|---|---|
| ASK | Amplitude Shift Keying | Keying 0's and 1's by altering the radio carriers amplitude |
| FSK | Frequency Shift Keying | Keying 0's and 1's by altering the radio carriers frequency |
| PSK | Phase Shift Keying | Keying 0's and 1's by altering the radio carriers phase |
| MPSK | Multiple Phase Shift Keying | Keying more than one bit at a time by using four or more phases |
| IR | Intended Radiator | The active RF transmitter |
| RF | Radio Frequency | Rate of oscillation in the range of around 3 kHz to 300 GHz corresponding to radio waves |
| FSPL | Free Space Path Loss | Loss of amplitude of the signal in free space over distance |
| ISI | Intersymbol Interference | Signal misinterpreted by receiver due to multipath signals out of phase |
| EIRP | Equivalent isotropically radiated power | The highest RF signal strength transmitted from a particular antenna. Often expressed in dBm |
| RSSI | Received Signal Strength Indicator | power level received by the receiver radio in dbm |
| mW | Milli Watt | 0,001 Watt |
| dB | Decibel | Logarithmic unit used to express the ratio between two values. dB = 10 x log10 Ratio1 / Ratio2 |
| dBm | Decibel milliwatt | Decibel relative to 1 mW of power. |
| dBi | Decibel isotropic | Antenna gain compared to a theoretical isotropic antenna |
| dBd | Decibel dipole | Antenna gain compared to a theoretical isotropic antenna. Add 2,14 dB to get dBi |
| SNR | Signal to Noise Ratio | Distance between received signal and noise floor. Expressed in dB |
| DRS | Dynamic Rate Switching | Switching to a higher/lower data rate as the received signal increases/decreases |