Carrier embedded optical radio-signal modulation of heterodyne optical carrier suppression

摘要

Certain implementations of the disclosed technology may include systems, methods, and apparatus for carrier-embedded optical radio-over-fiber (RoF) communications. Example embodiments of the method may include modulating a baseband signal with and an intermediate frequency (IF) and a radio frequency (RF) carrier signal to produce a RF modulated optical signal, transmitting the RF modulated optical signal to a remote access point with an optical fiber, and detecting the transmitted RF modulated optical signal. The method may also include receiving a RF uplink signal and mixing a harmonic of the RF carrier signal with the received RF uplink signal to down-convert the received RF uplink signal to an IF uplink signal. The method may include modulating a second optical source with the IF uplink signal to produce an IF uplink optical signal, transmitting the IF uplink optical signal via an optical fiber, and detecting the IF uplink optical signal.

主权项

1. A method for providing carrier-embedded optical radio-over-fiber (RoF) communications, the method comprising:
producing a radio frequency (RF) modulated optical signal that is associated with a first optical source and modulated with an electronic baseband; producing an intermediate frequency (IF) signal; producing a RF carrier signal; transmitting, by a first optical fiber, the RF modulated optical signal from the RoF Gateway Router to a remote access point; detecting, at the remote access point, the transmitted RF modulated optical signal to produce an electrical remote access point signal, wherein the remote access point signal is represented by (½)cos(2ω0t)+(α/2)Re{x(t)exp(j(2ω0+ωIF)t)}, wherein where x(t) is the baseband signal, ω0 is the angular frequency of the RF carrier signal, ωIF is the angular frequency of the IF signal, and α is an amplitude factor; filtering the remote access point signal to pass a harmonic of the RF carrier signal to an uplink section of the remote access point; receiving a RF uplink signal; mixing the harmonic of the RF carrier signal with the received RF uplink signal to down-convert the received RF uplink signal to an IF uplink signal; modulating a second optical source or light from the second optical source with the IF uplink signal to produce an IF uplink optical signal; transmitting, by a second optical fiber, the IF uplink optical signal from the remote access point to the RoF Gateway Router; and detecting, at the RoF Gateway Router, the IF uplink optical signal.