Antenna Selection for UWB Interference Avoidance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Ultra Wide Band (UWB) communication systems face interference issues due to their operation in shared frequency bands, leading to degradation in communication performance, with existing methods like band dropping reducing available bandwidth.
Innovation Solution
The method involves using multiple antennas with different characteristics to select the best antenna for information exchange, detecting and avoiding interferers, and optimizing communication performance without reducing bandwidth or resources, by switching between antennas to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If band dropping approach is used to avoid interference, then interference is reduced, but available bandwidth is reduced
Solution Approach 1:
The patent introduces an intermediary mechanism (interference detection and antenna selection system) between the UWB device and the interferer. The system detects interferers through training frames and signal quality measurements, then selects alternative antennas or adjusts transmission parameters to avoid interference without removing frequency bands, thus preserving full bandwidth availability.
Solution Approach 2:
The patent implements dynamic antenna selection and transmission parameter adjustment based on real-time interference detection. The system continuously monitors signal quality through training frames and adapts the antenna configuration during communication, allowing flexible response to interferers while maintaining optimal bandwidth utilization without static band dropping.
2Object-affected harmful factors
If puncturing of sub-carriers is used to avoid interference, then interference is reduced, but transmission resources are reduced
Solution Approach 1:
The patent uses an intermediary detection system that identifies interferers through training frames before data transmission. By detecting interferers early and adjusting antenna selection or transmission parameters, the system avoids the need to puncture sub-carriers, thereby preserving all transmission resources while still mitigating interference through alternative means.
Solution Approach 2:
The patent performs preliminary interference detection during the training frame exchange phase before actual data transmission. This preliminary action allows the system to identify interferers and select appropriate antennas or parameters in advance, preventing the need for resource-wasting sub-carrier puncturing during data transmission.
3Object-affected harmful factors
If antenna selection is used to reduce interference, then interference is reduced, but device complexity increases
Solution Approach 1:
The patent segments the antenna array into individually controllable elements with distinct radiation patterns. By dividing the antenna system into separable units that can be independently selected or combined, the patent simplifies the control logic compared to managing continuous beamforming parameters, reducing overall device complexity while maintaining interference mitigation capability.
Solution Approach 2:
The patent implements self-service through automated antenna selection based on training frame analysis. The system autonomously detects interferers, evaluates antenna signal qualities, and selects the optimal antenna configuration without requiring complex external control systems, thereby minimizing device complexity while achieving interference reduction.
Data Source
AI summary
A device belonging to a wireless communication system and adapted to exchange information with another device of the system within a main band of frequencies includes N different antennas having respectively different antenna characteristics, with N being greater than one. A controllable selector selects one of the antennas. A detector detects through the selected antenna the eventual presence of at least one interferer operating within the main band of frequencies. A controller, upon presence of a detected interferer, controls the selector for selecting another antenna.