Ship Information Channel Selection for Lower Demodulation Load
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Solution Overview
Problem
Conventional ship information exchange devices experience increased demodulation processing load and data loss due to the need to sequentially demodulate reception data from multiple channels, regardless of whether the data includes ship information, leading to inefficient processing.
Innovation Solution
A ship information exchange device that includes a receiver, generator, detector, and demodulator, which selectively demodulates reception data based on detected reception levels, determining which channels to demodulate based on signal strength thresholds, thereby reducing unnecessary processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If demodulation is performed on all channels sequentially regardless of ship information presence, then complete data coverage is ensured, but demodulation processing load increases significantly
Solution Approach 1:
The detector performs preliminary detection of reception levels for all channels before the demodulator processes them. This preliminary action identifies which channels contain ship information, allowing the demodulator to skip unnecessary processing and focus only on relevant channels, thus reducing overall processing load while maintaining complete data coverage.
2Reliability
If demodulation is performed on all channels sequentially, then no data is missed, but processing time increases causing data loss
Solution Approach 1:
The detector performs preliminary detection of reception levels for all channels before the demodulator processes them. This preliminary action identifies which channels contain ship information, allowing the demodulator to skip unnecessary processing and focus only on relevant channels, thus reducing overall processing time while maintaining complete data coverage.
Solution Approach 2:
The system extracts only the channels that contain ship information from the set of all received channels. By using the detector to identify and extract relevant channels based on reception levels, the demodulator processes only necessary data, reducing processing time and preventing data loss while maintaining completeness of important information.
3Loss of information
If all channels are demodulated regardless of content, then comprehensive information is obtained, but processing cost increases
Solution Approach 1:
The system extracts only the channels that contain ship information from the set of all received channels. By using the detector to identify and extract relevant channels based on reception levels, the demodulator processes only necessary data, reducing processing cost while maintaining completeness of important information.
Solution Approach 2:
Instead of performing full demodulation on all channels (excessive action), the system performs partial demodulation only on channels identified as containing ship information. This partial action is sufficient to obtain all necessary information while significantly reducing processing cost.
Data Source
AI summary
A ship information exchange device capable of reducing a demodulation processing load is provided. The ship information exchange device includes a receiver, a generator, a detector, and a demodulator. The receiver receives a radio signal. The generator generates reception data of a plurality of channels used for transmission of ship information based on the radio signal. The detector detects a reception level of each of the channels. The demodulator demodulates the reception data. The demodulator determines the reception data to be demodulated according to the detection result of the reception levels.