Communication Apparatus Sub-band Interference Avoidance
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Solution Overview
Problem
Conventional detect and avoid (DAA) methods in near field network systems, such as Ultra WideBand (UWB) communication, face challenges in distinguishing noise from signals, leading to inefficient interference avoidance as they require repeated searches and increased operational load.
Innovation Solution
A communication apparatus and method that divides the reception frequency band into sub-frequency bands managed in groups, allowing for interference determination and the transmission of an interference avoidance request signal to other devices to use non-interfering sub-frequency bands, thereby simplifying and enhancing interference avoidance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional DAA method detects power of received signals to identify interference, then interference avoidance is achieved, but noise is difficult to be distinguished from signal leading to repeated search operations
Solution Approach 1:
The reception frequency band is divided into multiple sub-frequency bands (e.g., 3 sub-bands per group). By segmenting the frequency spectrum, the system can identify and avoid only the specific sub-bands causing interference rather than repeatedly searching the entire frequency band, thus reducing search operations while maintaining reliable interference avoidance.
2Object-affected harmful factors
If current frequency is changed to another frequency when noise is detected, then interference is avoided, but the operational load increases due to repeated searches
Solution Approach 1:
The system performs preliminary detection of sub-frequency bands to identify which ones are causing interference before actual communication begins. By pre-identifying and excluding problematic sub-bands, the system avoids the need for repeated searches during operation, reducing operational complexity while maintaining effective interference avoidance.
3Measurement precision
If reception frequency band is divided into sub-frequency bands managed in groups, then interference determination becomes more precise, but device complexity increases
Solution Approach 1:
Sub-frequency bands are grouped together (e.g., 3 sub-bands per group) and managed as unified units. This merging approach allows the system to achieve precise interference detection at the sub-band level while simplifying overall frequency management by treating groups as manageable entities, thus balancing precision with reduced complexity.
Data Source
AI summary
A communication apparatus and method for operating a communication apparatus are provided. The communication apparatus is configured to determine whether a sub-frequency band causing interference is present among sub-frequency bands included in a reception frequency band group, and to send to another communication apparatus an interference avoidance request signal which requests the other communication apparatus to transmit signals by use of remaining sub-frequency bands except the sub-frequency band causing interference, leading to simpler and more efficient interference avoidance.