MIMO Antenna Deployment Evaluation via Phase Difference Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for evaluating LOS-MIMO antenna deployments are either costly, complex, or lack precision, making it difficult to determine suitable antenna positions for MIMO communication systems, especially in environments where full system installation is impractical or sub-optimal configurations are present.
Innovation Solution
A method involving the transmission of two tones at different frequencies from transmit antennas and receiving these signals with square-law detectors on receive antennas to determine phase differences, allowing for quick, cost-effective evaluation of MIMO antenna deployments without requiring a full-fledged MIMO system or demodulation, and enabling real-time assessment of antenna suitability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a full LOS-MIMO communication system is deployed to measure phase differences, then measurement precision is improved, but device complexity and installation cost increase significantly
Solution Approach 1:
The patent extracts only the essential measurement function from the full MIMO system by using a simplified two-tone transmission setup with power detectors, eliminating the need for complete system deployment while maintaining measurement capability
Solution Approach 2:
The patent creates a simplified measurement model that copies only the necessary signal path characteristics without requiring the full operational MIMO system, using tone signals and power detection to replicate phase difference measurement functionality
2Ease of operation
If GPS tools are used to measure antenna positions, then ease of operation is improved, but measurement precision deteriorates due to obscured sky view
Solution Approach 1:
The patent replaces GPS-based mechanical positioning with a signal-based measurement system that determines antenna deployment suitability through electromagnetic signal phase relationships, eliminating dependence on satellite visibility
3Adaptability or versatility
If antenna positions are modified after full system installation, then adaptability is improved, but loss of time and additional installation cost increase
Solution Approach 1:
The patent enables preliminary evaluation of antenna deployment suitability before full system installation using simple two-tone measurements, allowing position optimization to be performed early when modifications are easier and less costly
4Measurement precision
If traditional MIMO signal processing is used to evaluate antenna deployment, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts only the phase difference measurement functionality from complete MIMO signal processing by using power detection of combined tone signals, eliminating the need for demodulation and complex signal processing while maintaining evaluation precision
Solution Approach 2:
The patent changes the measurement parameter from complex signal phase to power signal phase, which can be obtained through simple power detection without requiring full MIMO signal processing, thereby reducing system complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables precise and efficient evaluation of MIMO antenna deployments, supporting both optimal and sub-optimal configurations, and is applicable before full system deployment, reducing installation complexities and costs.
Implementation Method 1
receiving a first composite signal via a first receive antenna. The first composite signal comprising a first tone transmitted from a first transmit antenna at a first variable frequency and a second tone transmitted from a second transmit antenna at a second variable frequency different from the first variable frequency
Data Source
AI summary
The present disclosure relates to a radio receiver, a radio transmitter, and methods for evaluating multiple-input multiple-output, MIMO, antenna deployment. The method for evaluating MIMO, antenna deployment comprises the steps of receiving a first composite signal via a first receive antenna. The first composite signal comprises a first tone transmitted from a first transmit antenna at a first variable frequency and a second tone transmitted from a second transmit antenna at a second variable frequency different from the first variable frequency, and also receiving a second composite signal via a second receive antenna. The second composite signal comprising the first tone transmitted from the first transmit antenna and the second tone transmitted from the second transmit antenna. The method also comprises determining a first power signal from the first composite signal, and determining a second power signal from the second composite signal, as well as determining a phase difference between the phase of the first power signal and the phase of the second power signal, and evaluating MIMO antenna deployment based on the determined phase difference.