Adaptive Antenna Diversity for Accurate Packet-Based Switching
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Solution Overview
Problem
Conventional antenna diversity mechanisms face issues such as selecting inappropriate antennas for data reception, degradation due to peer device misalignment, and performance impact from unequal antenna loading, leading to suboptimal communication performance.
Innovation Solution
An adaptive antenna switching mechanism that compares signal strengths of multiple antennas over intervals, adjusts default antenna selection based on cumulative signal strength comparisons, and incorporates unicast packet analysis to refine antenna choice.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If antenna selection is done in the L-STF of the packet, then antenna switching can be performed quickly, but the receiver cannot recognize unicast packets and may select inappropriate antennas
Solution Approach 1:
The patent performs preliminary antenna selection during the L-STF phase for all packets, then refines the selection after unicast packet recognition. This allows quick initial switching while enabling subsequent correction based on actual unicast packet identification, resolving the contradiction between speed and accuracy.
2Ease of operation
If the receiver always selects the antenna with higher signal strength in L-STF, then antenna switching is simple, but performance degrades when strong signals are not unicast to the receiver
Solution Approach 1:
The patent uses feedback from unicast packet recognition to correct initial antenna selections. After recognizing unicast packets, the receiver compares the selected antenna with the actual unicast target and adjusts future selections accordingly, maintaining simplicity while improving reliability through learned correction.
3Ease of operation
If peer devices use default antenna information, then transmission is straightforward, but receiver performance degrades when the current device switches antennas
Solution Approach 1:
The patent enables peer devices to self-adjust by providing them with calibration data from both antennas. When the current device switches antennas, peer devices use the provided calibration information to adapt their transmission, maintaining simplicity while ensuring continued performance without requiring active coordination.
4Device complexity
If calibration data from the first antenna is used for the second antenna, then the system is simple, but performance degrades due to different antenna loading
Solution Approach 1:
The patent segments the calibration approach by maintaining separate calibration data for each antenna while providing both to peer devices. This allows the receiver to use appropriate calibration for each antenna (maintaining performance) while peer devices receive comprehensive calibration information (maintaining simplicity).
Data Source
AI summary
The present invention provides a control method of an electronic device is disclosed, wherein the electronic device includes a first antenna and a second antenna. The control method includes the steps of: setting one of the first antenna and the second antenna as a default antenna; receiving a plurality of packets within an interval; for each of the plurality of packets, comparing a signal strength corresponding to the first antenna and a signal strength of the second antenna to generate a first comparison result; updating a first value or a second value according to the first comparison result; comparing the first value and the second value to generate a second comparison result when running out the interval; and selecting one of the first antenna and the second antenna to be the default antenna according to the second comparison result.