Important Symbols
| Symbol | Description | Unit |
 |
carrier (radio) frequency (typically in GHz) | Hz |
 |
separation between the mobile unit and the base station | km |
 |
speed of light in vacuum,  |
m/s |
 |
path-loss exponent (of a wireless channel) | – |
 |
carrier (optical) frequency | THz |
 ,  |
wavelength | nm |
 ,  |
optical line width | nm |
 |
modulation index | – |
| instantaneous optical power | mW | |
| mean optical power | mW ... |
Get Radio over Fiber for Wireless Communications: From Fundamentals to Advanced Topics now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
