US20260088906
2026-03-26
Electricity
H04B10/541
The patent application introduces a method and corresponding device for enhancing optical communication, particularly beneficial for networks exceeding 400 Gbps, such as metropolitan area networks and data centers. This method involves creating a super-frame composed of multiple sub-frames, each containing specific training and pilot symbols. These symbols are designed to ensure direct current balance, improving signal restoration at the receiver end.
The evolution of technologies like 5G and cloud computing necessitates high-capacity optical networks. Current coherent optical systems, which utilize light wave properties to transmit data, face challenges such as distortion and noise. Traditional symbol sequences, primarily used for 400-Gbps scenarios, lack adaptability for higher data rates and exhibit poor cross-correlation in different polarization directions.
The proposed method generates a super-frame with sub-frames containing training and pilot symbols. These symbols are represented by complex numbers (−A−Aj, −A+Aj, A−Aj, A+Aj). The quantities of these symbols in two orthogonal polarization directions are calculated to maintain direct current balance, essential for effective signal recovery. The method ensures that the sum of training and pilot symbols in any polarization direction is not less than five.
The reception method involves receiving and decoding the super-frame. Similar to the transmission method, it ensures the quantities of the training and pilot symbols are balanced across polarization directions. This balance aids in maintaining signal integrity and improving the quality of the restored signal at the receiver end.