A calculation method and system for an antenna pattern adapted to a wireless channel
By establishing the mathematical relationship between antenna directionality and channel capacity, and using SVD decomposition and water injection algorithm to calculate the optimal antenna pattern, the problem of high computing complexity in the prior art is solved, and the optimal pattern calculation and capacity upper bound for adapting to wireless channels is realized.
CN115811345BActive Publication Date: 2025-07-18XI AN JIAOTONG UNIV
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Patent Information
- Application Number
- CN202211468650.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-11-22
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2042-11-22
AI Technical Summary
Technical Problem
The lack of a method of directly calculating the antenna pattern in the prior art makes it impossible to find the optimal pattern adapted to the wireless channel, and the calculation complexity is high.
Method used
By establishing the mathematical relationship between antenna directionality and channel capacity, the optimal antenna direction map is calculated using SVD decomposition and water injection algorithm, discrete modeling is performed and the power allocation of the transmitting antenna is determined.
Benefits of technology
It realizes the calculation of the optimal antenna pattern under the random geometric channel model, simplifies the calculation process, provides a capacity upper bound, and can be used as a target pattern for antenna synthesis.
✦ Generated by Eureka AI based on patent content.
Abstract
The present invention discloses a calculation method for an antenna pattern adapted to a wireless channel. The method is as follows: Discretely model the antenna pattern: Divide the spatial sphere into N equal parts, and within each part of the spatial angle, the radiation characteristics of the antenna are the same; The communication environment is the downlink of a base station and a mobile phone user. The number of antennas of the base station as the transmitting end is Tx, and the number of antennas of the mobile phone user as the receiving end is Rx. Under the random geometric channel model, establish the antenna pattern and the channel matrix, obtain the relationship between the channel capacity and the antenna pattern, and use the channel capacity as the performance index of the system; The antenna pattern that maximizes the channel capacity is defined as the best-adapted antenna pattern for the wireless channel, with the constraint that the total power of the transmitting antennas is P; Use SVD decomposition and the water-filling algorithm to calculate the optimal antenna pattern and determine the power allocation of each transmitting antenna; The optimal pattern adapted to the wireless channel is given, which can be used as the target pattern for antenna synthesis.
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