Cross-Medium Transmission Method Based on 8B/10B Special Position Coding

To address limited transmission rates resulting from the laser’s low repetition frequency in cross-medium communication, this study proposed a specialized position coding cross-medium transmission method based on 8B/10B to enhance the transmission efficiency. Strategies such as odd-even alternating coding, position coding, and setting empty codes were designed to address the impact of pulse position modulation on transmission rates caused by the “back-to-back” phenomenon. This method ensures that when a pulse occurs in the last four positions of the preceding transmission cycle, it will not occur in the first four positions of the subsequent cycle. A corresponding transmission system was constructed to validate the specialized position coding cross-medium transmission method based on 8B/10B. A laser with a repetition frequency of 60 Hz was used to conduct experiments in a water pool and successfully achieved cross-medium communication at a transmission rate of 181.8 bps.