Patent ID: 7657189
Filing Date: 2010-02-02
Classification: H04B

Abstract:
1. A system for translating the frequency of an input radio frequency signal to an optical frequency output signal for transmission via an optical transmission media to a receiver, such receiver re-translating the frequency of such optical frequency signal to a corresponding radio frequency signal, comprising: a main transmission link for modulating the input radio frequency signal with a first optical frequency signal having a first optical frequency to produce a main signal comprising components of the input signal translated in frequency by the first optical frequency along with optical frequency spurious signal components; feedforward optical link for modulating a portion of the input radio frequency signal with a second optical frequency signal having a second different optical frequency to produce a feedforward signal comprising components of the input radio frequency signal translated in frequency by the second optical frequency; wherein the receiver: (a) extracts the optical frequency spurious signal components produced by the main transmission link and re-translates the frequency of such extracted optical frequency spurious signal components to radio frequency signal spurious signal components; (b) re-translates the frequency of the components of the main optical frequency and optical frequency spurious signal components of the main signal to radio frequency components; and (c) subtracts the extracted and re-frequency translated optical frequency spurious signal components from the re-translated frequency components of the main signal.