Radiated Sensitivity Measurement Using Path Loss Correction
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Solution Overview
Problem
Current sensitivity measurement methods for wireless mobile stations, such as those outlined in 3GPP and CTIA standards, are limited in their ability to assess sensitivity degradation caused by spurious emissions and electromagnetic compatibility issues, as they primarily focus on conducted sensitivity or radiated sensitivity tests that require extensive resources and are not efficient for routine testing.
Innovation Solution
A method and system for performing wireless reception performance tests using a path loss correction factor to compensate for path loss from the base station emulator to the wireless device, allowing for accurate measurement of radiated sensitivity referenced to the antenna port (RSRAP), which combines the advantages of conducted and radiated sensitivity testing, enabling efficient detection of sensitivity degradation due to spurious emissions in both near and far field conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conducted sensitivity test method (3GPP standard) is used, then measurement simplicity is improved, but measurement precision is worsened because it only reveals sensitivity degradation caused by conduction within interconnects and cannot detect spurious emissions
Solution Approach 1:
A path loss correction factor is introduced as an intermediary element to bridge the gap between simple conducted tests and accurate radiated sensitivity measurements. The correction factor compensates for path loss effects, enabling the use of simpler test setups while achieving accuracy comparable to complex radiated tests
Solution Approach 2:
The test method is designed to serve multiple functions: it can detect both conducted sensitivity degradation and radiated sensitivity degradation caused by spurious emissions, making it universally applicable for comprehensive sensitivity assessment without requiring separate test procedures
2Measurement precision
If radiated sensitivity test method (CTIA standard) is used, then measurement precision is improved by exposing all electromagnetic compatibility issues, but device complexity is worsened due to requirement for extensive far field test facilities
Solution Approach 1:
The essential measurement function is extracted from the complex far field test facility environment and transferred to a simpler test setup. By applying the path loss correction factor, the patent extracts the core sensitivity measurement capability while eliminating the need for extensive far field facilities
Solution Approach 2:
The patent creates a simplified model or copy of the radiated test conditions using path loss correction factors. Instead of physically recreating far field conditions, the correction factor mathematically models the path loss effects, providing an accurate representation without the physical complexity
3Difficulty of detecting and measuring
If radiated sensitivity test method is used, then detection capability is improved for spurious emissions, but loss of time is worsened due to extensive testing requirements
Solution Approach 1:
Path loss correction factors are calculated and applied in advance to compensate for expected path loss effects. This preliminary action allows the test to proceed directly without requiring time-consuming far field facility setups or complex real-time path loss measurements
Data Source
AI summary
A system and method is provided for performing a wireless reception performance test between a wireless device and a base station emulator. The method comprises generating a path loss correction factor. The path loss correction factor compensates for path loss from an antenna port of the base station emulator to an antenna port of the wireless device. The method further comprises transmitting from the base station emulator at least a further signal transmission. The further signal transmission includes the path loss correction factor such that the transmission power of the further signal transmission removes the effect of path loss from the wireless reception performance test.