Transmission Method for Optical Communication and Related Apparatus

A method for optical communication, comprising:

• receiving a super-frame comprising a plurality of sub-frames, wherein each of the sub-frames comprises pilot symbols, wherein in a polarization direction, a quantity NPS of the pilot symbols in each of the sub-frames is an even number greater than 0, wherein each of the pilot symbols is one of four complex numbers:
• −A−Aj, −A+Aj, A−Aj, and A+Aj, wherein A is a real number, wherein every NPG consecutive symbols in each of the suub-frames comprise one pilot symbol located at a fixed position, wherein the super-frame comprises one first-type sub-frame, wherein the first-type sub-frame comprises NFAW frame alignment word symbols, wherein each of the NFAW frame alignment word symbols is one of the four complex numbers:
• −A−Aj, −A+Aj, A−Aj, and A+Aj, wherein in the first-type sub-frame, oen symbol of the NFAW frame alignment word symbols also serves as one pilot symbol, and wherein NFAW is an odd number;
• and
• decoding the super-frame.

A data transmission apparatus comprising:

• a processor configured to obtain a super-frame comprising a plurality of sub-frames, wherein each of the sub-frames comprises pilot symbols, wherein in a polarization direction, a quantity NPS of the pilot symbols in each of the sub-frames is an even number greater than 0, wherein each of the pilot symbols is one of four complex numbers:
• −A−Aj, −A+Aj, A−Aj, and A+Aj, wherein A is a real number, wherein every NPG consecutive symbols in each of the sub-frames comprise one pilot symbol located at a fixed position, wherein the super-frame comprises one first-type sub-frame, wherein the first-type sub-frame comprises NFAW frame alignment word symbols, wherein each of the NFAW frame alignment word symbols is one of the four complex numbers:
• −A−Aj, −A+Aj, A−Aj, and A+Aj, wherein in the first-type sub-frame, one symbol of the NFAW frame alignment word symbols also serves as one pilot symbol, and wherein NFAW is an odd number;
• and
• a transceiver coupled to the processor and configured to send the super-frame.

A data transmission apparatus comprising:

• a transceiver configured to receive a super-frame comprising a plurality of sub-frames, wherein each of the subframes comprises pilot symbols, wherein in a polarization direction, a quantity NPS of the pilot symbols in each of the sub-frames is an even number greater than 0, wherein each of the pilot symbols is one of four complex numbers:
• −A−Aj, −A+Aj, A−Aj, and A+Aj, wherein A is a real number, wherein every NPG consecutive symbols in each of the sub-frames comprise one pilot symbol located at a fixed position, wherein the super-frame comprises one first-type sub-frame, wherein the first-type sub-frame comprises NFAW frame alignment word symbols, wherein each of the NFAW frame alignment word symbols is one of the four complex numbers:
• −A−Aj, −A+Aj, A−Aj, and A+Aj, wherein in the first-type sub-frame, one symbol of the NFAW frame alignment word symbols also serves as one pilot symbol, and wherein NFAW is an odd number;
• and
• a processor coupled to the transceiver and configured to decode the super-frame.