| 摘要 |
PROBLEM TO BE SOLVED: To provide a demodulating device which is suitable to receive and demodulate a data symbol that is sent as a part of an information burst with evasion of a control loop used for the amplitude and phase by connecting a differential phase detector to the detection of a coherent amplitude included in a detector that is used to receive the burst information which is transferred via a gain stabilization link. SOLUTION: A hybrid fiber coaxial system includes a head end station(HE), an optical network termination(ONT) and four terminals TA, TB, TC and TD. The station HE is connected to the termination ONT via a bidirectional optical fiber link, and the termination ONT is connected to the terminals TA, TB, TC and TD via a common coaxial link suitable to the bidirectional transmission and also every individual coaxial link. The optical signals undergo the light/electricity conversion at the station HE, and a data packet that is generated in such a way is added to a demodulating device. |
