System and Method for the Sub-Octave Transmission of Multi-Octave Telecommunications Signals

摘要

A system and method are provided for transmitting multi-octave telecommunications signals, as sub-octave signals, on an optical fiber. Using different modems, digital signals are modulated onto respective radio frequency (RF) carriers. In detail, the resultant RF signals (fn) are all within a same lower frequency band. At least one fn is a multi-octave signal. A frequency changer switches each fn (possibly multi-octave) from the lower frequency band to an upper frequency band, where they avoid overlapping each other, and where they are each established as a sub-octave signal (f″n). A combiner then groups the individual sub-octave signals (f″n) into a single sub-octave signal (f″). Further, an electrical/optical converter creates an optical signal of wavelength (λ) for transmitting the combined sub-octave signal (f″) over the optical fiber.

主权项

1. A system for transmitting multi-octave telecommunications signals as sub-octave signals on an optical fiber, which comprises:
a plurality of an n number of modems, wherein each modem modulates a respective digital signal onto a radio frequency (RF) carrier to create a respective plurality of RF signals (fn) within a substantially same lower frequency band, and wherein at least one RF signal (fn) is a multi-octave signal in the lower frequency band; a frequency changer for switching each RF signal (fn) from the lower frequency band to an upper frequency band to establish each fn as a sub-octave signal (f″n) in the upper frequency band, and wherein each RF signal (f″n) avoids overlap with every other RF signal (f″n) in the upper frequency band; a combiner for grouping the sub-octave signals (f″n) into a single sub-octave signal (f″); and an electrical/optical converter for creating an optical signal of wavelength (λ) as a carrier for the sub-octave signal (f″) for transmission over the optical fiber.