Wireless Communication Device Dynamic Diversity Switching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems with frequency and space diversity face instability due to fluctuating fading effects, leading to excessive diversity orders during favorable propagation conditions, which can result in suspended diversity operations and unstable communication.
Innovation Solution
A wireless communication system that dynamically switches between quadruple diversity and double diversity based on fading influence, using frequency and space diversity methods, with monitoring mechanisms to adaptively manage fading fluctuations and optimize frequency resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If diversity operation is maintained during favorable propagation conditions, then line quality is maintained, but frequency band utilization efficiency decreases and data transmission capacity is reduced
Solution Approach 1:
The patent implements dynamic switching between diversity operation mode and non-diversity mode based on real-time propagation condition monitoring. When propagation conditions are favorable, the system switches to non-diversity mode to double data transmission capacity. When conditions deteriorate, it automatically switches back to diversity mode to maintain line quality. This dynamic adaptation resolves the contradiction by making the system flexible rather than static.
Solution Approach 2:
The system changes the operational parameter (diversity order) based on propagation conditions. During favorable conditions, it reduces diversity order to increase throughput; during poor conditions, it increases diversity order to maintain reliability. This parameter adjustment strategy allows the system to optimize between reliability and productivity based on external conditions.
2Reliability
If diversity order is determined to maintain line quality during severe fading, then communication reliability is improved, but system efficiency decreases during periods with small fading influence
Solution Approach 1:
The patent introduces dynamic adaptation by continuously monitoring propagation conditions and adjusting diversity operation accordingly. The system transitions from a static diversity configuration to a dynamic one that adapts to changing channel conditions, maintaining reliability when needed while maximizing efficiency when conditions permit.
Solution Approach 2:
The system modifies the diversity order parameter based on fading conditions. During severe fading, it maintains high diversity order for reliability; during light fading, it reduces diversity order to improve efficiency. This conditional parameter change resolves the contradiction between reliability and efficiency.
3Productivity
If diversity operation is suspended during favorable propagation conditions, then frequency bands are efficiently used, but communication stability deteriorates due to repeated suspending and resuming
Solution Approach 1:
The patent implements a feedback mechanism where propagation conditions are continuously monitored and used to control diversity operation. The system only suspends diversity when conditions are consistently favorable, and resumes when conditions deteriorate, avoiding repeated suspensions and resumptions that would cause instability. The feedback loop ensures smooth transitions based on actual channel state.
Data Source
AI summary
By switching to a method that allocates frequency diversity as an independent signal sequence during the time when an influence of fading is small, adaptively corresponding to an increase and decrease of fading, performs stable wireless communication, and frequency resources are effectively utilized. A wireless communication system selects and performs quadruple diversity which is composed of space diversity using two uncorrelated antennas and frequency diversity using two waves of frequencies f1 and f2 or double diversity of only the space diversity. A matching filter 211 evaluates that the influence of fading is small when all tap information from adaptive matched filters 207 to 210 indicates a value greater than or equal to a threshold, and while switching selector switches 104 and 215 and performing only the space diversity, transmitting and receiving independent two transmission data that is respectively modulated by modulators 102 and 103.