Free-Space Optical Interleaving for Burst Error Correction
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Solution Overview
Problem
Conventional optical fiber communication techniques do not achieve high performance in free-space optical communication due to differences in transmission path characteristics, leading to increased data error rates and compatibility issues, and result in higher development and introduction costs.
Innovation Solution
A communication system with an interleaving unit to determine and adjust the interleaving length of transmit data, and a shaping unit to make this length detectable on the receiving side, using a Reed-Solomon product code for error correction and incorporating synchronization codes to optimize communication performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If optical fiber communication techniques are directly applied to free-space optical communication, then development costs are reduced, but communication performance deteriorates due to differences in transmission path characteristics
Solution Approach 1:
The patent changes the interleaving length parameter dynamically to adapt to free-space optical communication characteristics. By adjusting the interleaving length based on transmission conditions, the system achieves high communication performance without requiring complete redesign of optical fiber communication protocols, thus resolving the contradiction between development cost and communication performance.
2Device complexity
If conventional optical fiber communication protocols are used, then system complexity is reduced, but data error rate increases due to mismatch with free-space transmission characteristics
Solution Approach 1:
The patent introduces dynamic adjustment of interleving length based on transmission conditions. The system can adaptively change the interleving length parameter to match free-space optical communication characteristics, thereby reducing data error rates without requiring complete system redesign and maintaining acceptable complexity levels.
3Ease of operation
If fixed interleaving length is used, then processing simplicity is maintained, but communication quality deteriorates under varying transmission conditions
Solution Approach 1:
The patent implements dynamic interleving length adjustment that automatically adapts to varying transmission conditions in free-space optical communication. This dynamic approach maintains processing simplicity through automated control while significantly improving communication quality by matching the interleving length to current transmission characteristics.
4Reliability
If interleaving length is extended to correct burst errors, then error correction capability is improved, but communication delay increases
Solution Approach 1:
The patent dynamically adjusts the interleving length based on actual transmission conditions. When burst errors are detected or anticipated, the system extends the interleving length to improve error correction capability. When transmission conditions are good, the system reduces the interleving length to minimize communication delay, thus resolving the contradiction between error correction capability and communication delay.
Data Source
AI summary
A communication device includes an interleaving unit that determines an interleaving length of transmit data to be transmitted through free-space optical communication, and interleaves the transmit data based on the determined interleaving length, and a shaping unit that shapes the interleaved transmit data so as to make the interleaving length detectable on a receiving side of the free-space optical communication.