Ring Transmission Path Clock Regeneration for CT Rotation Sync
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Solution Overview
Problem
In wireless communication systems using electromagnetic near fields with a ring-shaped transmission path, the constant Doppler shift amount across different reception antenna positions can lead to reduced reception capabilities due to frequency changes and synchronization issues.
Innovation Solution
The communication apparatus includes a ring-shaped transmission path with multiple transmission paths, a first coupler, a determining unit, and a data generating unit to regenerate clock signals based on reception positions, using two antenna couplers and clock regenerating units to maintain synchronization and reduce Doppler shift impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless communication based on electromagnetic near field is performed using a ring-shaped transmission path, then the system can maintain constant Doppler shift amount regardless of reception antenna positions, but reception capabilities are reduced due to frequency changes and synchronization issues
Solution Approach 1:
The system dynamically adjusts the clock signal based on the rotation angle of the rotating part. The determining unit changes the clock signal in accordance with the rotation angle to compensate for Doppler shift variations, making the system adaptive to changing conditions rather than static
Solution Approach 2:
The system uses feedback from the rotation angle information to adjust the clock signal. The determining unit receives rotation angle information and uses this feedback to regenerate the clock signal at the appropriate phase, ensuring synchronization is maintained despite Doppler shift effects
2Reliability
If a plurality of reception antennas are provided to select the antenna with smallest doppler shift amount, then reception capabilities can be improved in radiated electromagnetic field systems, but the system becomes ineffective for electromagnetic near field systems with constant doppler shift
Solution Approach 1:
The invention creates a universal solution that works for both radiated electromagnetic field systems and electromagnetic near field systems. By using clock signal regeneration based on rotation angle that compensates for Doppler shift, the system achieves effectiveness across different wireless communication configurations without requiring multiple reception antennas
3Device complexity
If clock signal is not regenerated based on reception position, then system complexity is reduced, but synchronization issues occur due to Doppler shift
Solution Approach 1:
The determining unit acts as an intermediary that receives both the transmission data and rotation angle information, processes this information to determine the appropriate clock signal phase, and outputs the regenerated clock signal. This intermediary component enables synchronization without requiring complex multi-antenna systems
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 configuration effectively reduces Doppler shift impacts, ensuring stable reception capabilities by synchronizing clock signals with the rotation of the communication apparatus, thereby enhancing data transmission quality.
Implementation Method 1
a ring-shaped transmission path disposed in one of a fixed part and a rotating part... impacts of a Doppler shift that may occur in wireless communication in a rotating part
Implementation Method 2
a first coupler disposed in the other of the fixed part and the rotating part and configured to receive transmission data including a transmission signal and a clock signal
Data Source
AI summary
A communication apparatus according to an embodiment of the present disclosure includes: a ring-shaped transmission path which is disposed in one of a fixed part and a rotating part and includes a plurality of transmission paths each configured to transmit transmission data including a transmission signal and a clock signal; a first coupler disposed in the other of the fixed part and the rotating part and configured to receive the transmission data from one of the plurality of transmission paths; a determining unit configured to determine a regenerated clock signal based on the clock signal in accordance with a reception position in which the first coupler receives the transmission data from the one of the transmission paths; and a data generating unit configured to generate reception data on the basis of the transmission signal received by the first coupler and the regenerated clock signal.