Antenna Switching for Wireless Coexistence
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Solution Overview
Problem
Radio receivers are susceptible to desensitization due to noise signals in adjacent frequency bands, which can lead to the loss of intended signals, especially in devices sharing antennas for LTE, WLAN, and BT communications, causing significant degradation in performance.
Innovation Solution
Implementing a coexistence arbiter logic and antenna switching mechanism to selectively connect transceivers to antennas based on their operating modes, ensuring only active transceivers communicate on the antennas, thereby reducing interference from neighboring frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple transceivers share the same antenna, then device complexity is reduced and cost is lowered, but desensitization and interference between frequency bands increase
Solution Approach 1:
The patent implements dynamic antenna switching that changes the connection configuration between antennas and transceivers based on real-time operating conditions. The antenna switch dynamically reconfigures which transceiver is connected to which antenna, allowing the system to adapt from a static shared antenna configuration to a dynamic one that prevents desensitization while maintaining hardware sharing.
Solution Approach 2:
The patent segments the antenna connections by introducing an antenna switch that divides the antenna resources into separate paths for different transceivers. This segmentation allows independent control of signal paths for LTE, WLAN, and BT transceivers, preventing interference while maintaining the benefit of shared physical antennas.
2Reliability
If antenna switching is implemented to prevent desensitization, then receiver performance is improved, but device complexity and cost increase
Solution Approach 1:
The antenna switch is designed to serve multiple functions: it can connect different transceivers to antennas based on operating mode, enable MIMO operations, and provide desensitization protection. By making this single component multi-functional, the patent reduces the need for separate dedicated circuits for each function, thereby limiting the increase in device complexity.
Solution Approach 2:
The antenna switch acts as an intermediary component between the transceivers and antennas, mediating the connection and controlling signal flow. This intermediary approach allows the system to maintain simple shared antenna hardware while adding intelligent control logic that manages interference and optimizes performance without requiring complex dedicated hardware for each transceiver.
3Productivity
If all transceivers are always connected to antennas, then availability is maximized, but interference from inactive transceivers degrades signal quality
Solution Approach 1:
The system implements periodic or event-driven antenna switching based on transceiver operating modes. The antenna connection is changed periodically or when specific events occur (such as a transceiver transitioning between active and inactive states), ensuring that only actively transmitting or receiving transceivers are connected to antennas, thereby eliminating interference from inactive transceivers while maintaining availability when needed.
Data Source
AI summary
Systems, methods, and other embodiments associated with wireless coexistence through antenna switching are described. According to one embodiment, a method includes selecting one or both of a first transceiver and a second transceiver for connection to an antenna, based, at least in part, on the operating mode of the first transceiver and the second transceiver. The method includes connecting the selected transceiver(s) to the antenna, such that the selected transceiver(s) is enabled to communicate on the antenna and any transceiver(s) not selected is not able to communicate on the antenna.