Antenna Selection Using Transmission Power Constraints
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Solution Overview
Problem
Conventional antenna selection methods in wireless communication systems are inadequate as they do not account for differences in transmission power limitations across various antennas and transceiving links, leading to suboptimal signal transmission.
Innovation Solution
A method that calculates the maximum permissible transmission power for each antenna and antenna combination, estimating a second reception quality value based on the first reception quality and transmission power, to determine the best antenna or combination for transmitting signals, thereby accounting for differences in antennas and transceiving links.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the conventional antenna selection method is used (selecting antenna with highest received signal strength), then the selection process is simple, but the transmission signal strength may not be maximized due to ignoring transmission power limitations of different antennas
Solution Approach 1:
The patent changes the selection parameter from simple received signal strength to a composite metric that includes transmission power limitations. The selection metric is modified to account for both received signal quality and the maximum permissible transmission power of each antenna, transforming the selection criterion to achieve better overall transmission performance
Solution Approach 2:
The patent introduces a feedback mechanism where the device obtains reception quality values from received signals, calculates estimated reception quality values considering transmission power limitations, and uses this feedback information to select the optimal transmitting antenna. This closed-loop approach ensures the selection accounts for actual transmission constraints
2Device complexity
If antenna selection is based solely on received signal strength without considering transmission power, then the selection criterion is straightforward, but the actual received signal strength at the other end may not be maximized
Solution Approach 1:
The patent modifies the selection criterion by incorporating transmission power parameters into the decision metric. Instead of using only received signal strength, the system calculates a composite metric that includes the maximum permissible transmission power of each antenna, thereby changing the selection parameter to optimize transmitted signal strength
Solution Approach 2:
The patent performs preliminary calculation of transmission power limitations for each antenna before making the selection decision. By pre-calculating the maximum permissible transmission power and incorporating it into the selection metric, the system prepares the necessary information in advance to make an informed selection that maximizes transmitted signal strength
Data Source
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AI summary
Disclosed in the present invention is a method for selecting an antenna in a wireless communication system, a first device in the wireless communication system having at least two wireless transceiving links, and each wireless transceiving link having an antenna. The antenna selection method comprises: obtaining a first reception quality value of each antenna and/or at least one antenna combination for a signal transmitted by a second device; on the basis of a maximum permissible transmission power and the first reception quality value of said each antenna and/or the antenna combination, estimating a second reception quality value of the second device for a signal transmitted by said each antenna and/or the antenna combination; and on the basis of the second reception quality value, determining an antenna or antenna combination as a transmitting antenna to be used when transmitting a signal to the second device. The present invention also provides a wireless communication device.