- - IN-BAND OPTICAL INTERFERENCE MITIGATION FOR DIRECT-DETECTION OPTICAL COMMUNICATION SYSTEMS

摘要

The present disclosure provides systems, methods, and apparatus for mitigating the effects of interfering signals on optical signals received at direct-detection optical receivers. Optical receivers may attenuate reduced noise signals resulting from interference between the transmitted optical signal transmitted from the transmitter to the optical receiver and one or more additional signals received at the optical receiver. Interference may be due to multi-path interference or due to in-band interference. Receivers include a tunable filter for filtering the received optical signal to remove interference. The frequency offset module processes the received optical signal to determine a frequency offset that indicates a difference between carrier frequencies of the modulated optical signal and the interfering optical signal. The offset frequency and bandwidth determined by the frequency offset module can be used to adjust the tunable filter to remove the interfering signal from the received signal.