LOS Channel Antenna Ordering Verification for MIMO Connections
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Solution Overview
Problem
In multi-input multi-output (MIMO) systems, incorrect connections between antennas and radio units due to human error lead to mismatches in channel coefficients, causing losses in air interface transmission performance, and existing methods for ensuring correct connections are inaccurate due to reliance on air interface channel measurements affected by environmental factors.
Innovation Solution
An antenna ordering determining method that utilizes channel coefficients of line-of-sight (LOS) channels to detect correct connections by determining a target coefficient combination with optimal utility values based on phase differences, reducing environmental factor impact and improving detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If air interface channel measurement methods are used to determine antenna ordering, then the connection correctness can be verified, but the measurement accuracy deteriorates due to environmental factors such as LOS/NLOS types, interference, and angle direction
Solution Approach 1:
The patent introduces a reference signal as an intermediary to enable direct measurement of antenna ordering without relying on air interface channel measurements. The reference signal is transmitted through the antenna system and received at a known location, allowing the network device to directly determine the actual antenna ordering by comparing expected and actual signal characteristics, thereby eliminating the influence of environmental factors on measurement accuracy
Solution Approach 2:
The patent replaces the air interface channel measurement mechanism with a direct reference signal transmission and reception mechanism. Instead of measuring channel coefficients through complex air interface channels affected by environment, the system uses a simplified reference signal approach where the network device transmits reference signals through antennas and measures signal characteristics at a known receiver location to directly determine antenna ordering
2Ease of manufacture
If manual connection methods are used to connect antennas to radio unit ports, then the installation process is simple, but the connection correctness deteriorates due to human error
Solution Approach 1:
The patent enables the system to automatically detect and verify antenna ordering by having the network device measure reference signal characteristics and determine the actual connection configuration. This self-verification mechanism eliminates the need for manual verification by installation workers, allowing the system to automatically identify correct connections and detect mismatches between expected and actual antenna port assignments
Solution Approach 2:
The patent implements a feedback mechanism where the network device measures the actual antenna ordering through reference signal transmission and comparison with expected configurations. This feedback information can be used to automatically adjust or alert installation workers about connection errors, creating a closed-loop system that improves connection correctness without complicating the installation process
Data Source
AI summary
This application provides a method which includes: obtaining a plurality of channel coefficients, where the plurality of channel coefficients include N channel coefficients corresponding to a first terminal, the N channel coefficients include channel coefficients of LOS channels between one antenna of the first terminal and N antennas of a network device, and Nis an integer greater than 1; determining a target coefficient combination in M coefficient combinations corresponding to the first terminal, where a utility value of the target coefficient combination is greater than a utility value of another coefficient combination in the M coefficient combinations, each coefficient combination includes the N channel coefficients, channel coefficients included in any two of the M coefficient combinations are arranged in different manners, M=N! or M=(N!)/(2k), N! represents a factorial of N, and M and k are positive integers; and determining whether an antenna ordering is correct.