Difference between revisions of "WiFi abbreviations"
From Teknologisk videncenter
m (→Abbreviations) |
m (→Abbreviations) |
||
| Line 24: | Line 24: | ||
|- | |- | ||
| mW || Milli Watt || 0,001 Watt | | mW || Milli Watt || 0,001 Watt | ||
| + | |- | ||
| + | | dB ||Decibel || Logarithmic unit used to express the ratio between two values. dB = log<sub>10</sub> Ratio1 / Ratio2 | ||
|- | |- | ||
| dBm || Decibel milliwatt || Decibel relative to 1 mW of power. | | dBm || Decibel milliwatt || Decibel relative to 1 mW of power. | ||
| Line 31: | Line 33: | ||
| dBd || Decibel dipole || Antenna gain compared to a theoretical isotropic antenna. Add 2,14 dB to get dBi | | 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 | ||
|} | |} | ||
[[Category:WiFi]] | [[Category:WiFi]] | ||
Revision as of 12:36, 19 February 2014
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 |
| 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 = 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 |