| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide optical receiver equipment that processes electric signals of a plurality of systems, capable of accurately and precisely decoding the data contained in the reception signals. <P>SOLUTION: The received optical M number signal (M is integer of 2 or higher) is photoelectric converted to the electric signal of two systems, and then it is multiplex-separated into parallel data of m-bit. A phase synchronizing circuit 22 performs synchronous control corresponding to out-of-sync of a transfer frame consisting of the m-bit parallel data that has been multiplex separated. A frame synchronizing circuit 21 synchronizes with the transfer frame outputted from the phase synchronizing circuit 22. A phase searching circuit 23 searches logic and signal order when the out-of-sync of the transfer frame is released based on the state signal outputted from the frame synchronizing circuit 21. A phase control circuit 24 controls interchanging between odd bit and even bit and inversion process/non-inversion process of the logic for each of an odd bit and even bit in the bit stream of the transfer frame according to the control instruction of the phase searching circuit 23. <P>COPYRIGHT: (C)2007,JPO&INPIT |
