Radio Communication Device Interference Measurement via Null Symbols
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing radio communication systems face interference issues due to loss of synchronization, which can cause frequency channel overlaps and lower transmission data rates, particularly when using non-transmission sections to measure interference.
Innovation Solution
A radio communication device that switches frequency channels using a predetermined hopping pattern and includes a null determination unit to identify null symbols in received packets, allowing for interference measurement without disrupting communication, and a timing control unit to adjust transmission timing to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a non-transmission section is provided during communication to measure the interference amount, then the interference measurement accuracy is improved, but the transmission data rate lowers
Solution Approach 1:
The patent applies preliminary action by pre-arranging null symbols at specific positions within the transmission signal structure. These null symbols are prepared in advance as dedicated measurement points, allowing interference measurement to occur without requiring separate non-transmission sections. This resolves the contradiction by having measurement capability ready beforehand, eliminating the need to stop transmission for measurement.
Solution Approach 2:
The patent enables continuous useful action by integrating interference measurement into the ongoing transmission process through null symbols embedded in the signal stream. Instead of interrupting transmission for measurement, the system continuously transmits while simultaneously performing interference measurements at null symbol positions. This maintains uninterrupted data flow while achieving accurate interference measurement.
2Productivity
If frequency hopping is used to switch frequency channels at high speeds, then the communication efficiency is improved, but the synchronization stability worsens when loss of synchronization occurs
Solution Approach 1:
The patent implements feedback by continuously measuring interference amounts at null symbols and using this information to detect loss of synchronization. When interference patterns indicate synchronization loss, the system can trigger hopping pattern changes to realign with the counterpart device. This feedback mechanism maintains synchronization stability while preserving high-speed frequency hopping for communication efficiency.
Solution Approach 2:
The patent applies dynamics by making the hopping pattern adaptable and changeable based on synchronization status. Rather than using a fixed hopping pattern, the system dynamically adjusts the hopping pattern when loss of synchronization is detected through interference measurement. This allows the system to maintain high-speed frequency switching for efficiency while adapting to maintain synchronization stability when needed.
Data Source
AI summary
A radio communication device switches a frequency channel to be used by using a predetermined hopping pattern during communication with a counterpart radio communication device, and includes a null determination unit that determines a position of a null symbol included in a received packet from the counterpart radio communication device and an interference measuring unit that measures an interference amount by using the null symbol included in the received packet.