Optical Communication Wavelength Band Estimation for Phase Misalignment
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Solution Overview
Problem
In optical communication systems, phase misalignment between the transmission and reception sides leads to instability, requiring a light wavelength band change cycle that is twice the light reception cycle, which restricts communication speed and efficiency.
Innovation Solution
An optical communication apparatus and method that includes a light receiving unit, a wavelength band determining unit, and an estimating unit to identify and adjust wavelength bands, allowing for accurate estimation of wavelength bands even when they are not initially synchronized, using a predetermined cycle and reception period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transmission side secures a period which is twice the light reception cycle to maintain phase synchronization, then communication stability is improved, but communication speed and efficiency deteriorate
Solution Approach 1:
The patent applies preliminary action by performing wavelength band estimation in advance before actual communication data transmission. The reception apparatus estimates the wavelength band of incoming light signals beforehand, allowing the system to prepare appropriate decoding parameters and synchronization settings提前, thus enabling faster processing without requiring extended idle periods between communication cycles.
Solution Approach 2:
The patent replaces the mechanical timing synchronization approach with an optical-based wavelength band estimation approach. Instead of relying on strict temporal phase alignment between transmission and reception cycles, the system uses wavelength band characteristics to identify and decode communication signals, substituting mechanical timing constraints with optical property-based identification.
2Stability of the object's composition
If the transmission side uses a light wavelength band change cycle that is twice the light reception cycle, then phase synchronization is maintained, but the communication efficiency deteriorates
Solution Approach 1:
The patent applies parameter changes by shifting from time-based synchronization parameters to wavelength band-based identification parameters. The reception apparatus measures the wavelength band of received light signals and uses this spectral parameter to determine communication timing and decode information, replacing the traditional time-cycle synchronization parameter with a wavelength-based parameter that does not require strict temporal alignment.
3Measurement precision
If the wavelength band determination is performed without estimation for intermediate bands, then measurement precision is maintained, but communication reliability deteriorates when phase misalignment occurs
Solution Approach 1:
The patent applies preliminary action by implementing wavelength band estimation as a preliminary step before final wavelength band determination. When the measured wavelength band does not exactly match any predetermined communication wavelength bands, the system performs estimation to predict the most likely intended wavelength band, allowing reliable communication even when phase misalignment causes measurement deviations.
Solution Approach 2:
The patent implements feedback by using the estimation result to correct potential measurement errors. The system compares the measured wavelength band with estimated values, and when discrepancies are detected (indicating possible phase misalignment), the estimation feedback mechanism adjusts the wavelength band identification to maintain communication reliability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enables stable optical communication by accurately determining and estimating wavelength bands, ensuring communication object information can be decoded correctly even when the light emission periods are not in sync with the imaging cycles, thereby increasing communication speed and efficiency.
Implementation Method 1
a light receiving unit receives light which changes to predetermined wavelength bands in a predetermined cycle according to communication object information
Implementation Method 2
a wavelength band determining unit determines each wavelength band of the light received by the light receiving unit
Data Source
AI summary
An optical communication apparatus includes a light receiving unit, a wavelength band determining unit and an estimating unit. The light receiving unit receives light which changes to predetermined wavelength bands in a predetermined cycle according to communication object information, for a predetermined light reception period. The wavelength band determining unit determines each wavelength band of the light received by the light receiving unit. The estimating unit estimates that a wavelength band of the light received by the light receiving unit is any one of the predetermined wavelength bands, in a case where said wavelength band determined by the wavelength band determining unit is not any one of the predetermined wavelength bands.