Antenna Selection Algorithm for Full-Duplex MIMO Systems
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Solution Overview
Problem
Full-duplex MIMO systems face high complexity in selecting optimal transmitting and receiving antennas, which hampers performance improvement.
Innovation Solution
A low-complexity algorithm is developed to calculate and determine the optimal number of transmitting and receiving antennas based on channel information, maximizing the number of antenna set candidates and transmission rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If all possible antenna permutations are considered for selection in full-duplex MIMO system, then optimal transmitting and receiving antenna groups can be selected, but the computational complexity becomes excessively high
Solution Approach 1:
The patent segments the antenna selection process into two distinct stages: first determining the optimal number of transmitting and receiving antennas using a closed-form mathematical expression, and then selecting specific antenna elements based on channel information. This segmentation avoids the need to evaluate all possible antenna permutations, thereby reducing computational complexity while maintaining selection optimality.
Solution Approach 2:
The patent performs preliminary determination of the optimal numbers of transmitting and receiving antennas before the actual antenna selection process. By calculating these optimal numbers in advance using a closed-form expression that considers channel conditions, the system establishes a reduced search space for subsequent antenna element selection, significantly lowering the computational burden.
2Device complexity
If fixed transmitting and receiving groups are used as in half-duplex systems, then device complexity is reduced, but the system cannot take advantage of full-duplex simultaneous transmission and reception capabilities
Solution Approach 1:
The patent introduces dynamic antenna group configuration for full-duplex MIMO systems, where the transmitting and receiving antenna groups are no longer fixed but are dynamically determined based on channel conditions. The system adaptively selects optimal antenna numbers and specific antenna elements using channel information, enabling the system to exploit full-duplex capabilities while maintaining manageable complexity through structured selection algorithms.
Solution Approach 2:
The patent changes the parameters of antenna group configuration by determining optimal numbers of transmitting and receiving antennas based on channel conditions rather than using fixed configurations. This parameter adaptation allows the system to optimize performance for varying channel states while using mathematical expressions to control the complexity of the configuration process.
Data Source
AI summary
The present invention relates to a method for selecting transmitting and receiving antennas in a full-duplex MIMO system based on channel information. An embodiment of the present invention provides a method for selecting antennas in a full-duplex MIMO wireless communication system for communication between a first node and a second node. The method may include: calculating the number of transmitting antennas and the number of receiving antennas at a node i having an Ni number of antennas such that Nc has a maximum value, where Nc represents the number of all possible antenna set candidates, N is a natural number of 2 or higher with Ni being the sum of transmitting antennas and receiving antennas at said node i, and i is 1 or 2; and determining transmitting antennas and receiving antennas at node i in consideration of the transmission rate.