Multi-RAT RF Testing with Parallel Signal Sequence Processing
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Solution Overview
Problem
Testing radio frequency communication devices with multiple radio access technologies (RATs) is inefficient due to sequential calibration and verification processes, which increase testing time and cost as devices support more RATs.
Innovation Solution
A system and method that enables simultaneous signal sequence communication and processing between a tester and a device under test (DUT) using a single data signal sequence incorporating characteristics of multiple RATs, allowing for concurrent analysis and verification, thereby reducing setup and command sequences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sequential calibration and verification testing is performed for each RAT, then each RAT can be tested according to its specific standard specifications, but the testing time and cost increase significantly as devices support more RATs
Solution Approach 1:
The patent combines multiple separate calibration and verification test sequences for different RATs into a single integrated test sequence. The tester transmits a unified sequence of calibration signals that contains embedded calibration signals for multiple RATs (e.g., LTE, WCDMA, GSM) sequentially, allowing the DUT to be calibrated and verified for all supported RATs in one continuous operation rather than requiring separate setup and execution for each RAT.
Solution Approach 2:
The patent creates a universal testing framework where a single test sequence structure can accommodate multiple RAT types. The integrated sequence uses a common format with RAT-specific portions that can be configured for different radio access technologies, enabling the same testing infrastructure to universally test devices supporting various RATs without requiring dedicated sequential setup for each standard.
2Measurement precision
If separate test sequences are set up for each RAT, then each calibration and verification can be performed according to specific standards, but the device complexity and testing process complexity increase
Solution Approach 1:
The patent merges multiple separate testing processes into one integrated process. Instead of requiring the tester to be reconfigured and new command sequences to be established for each RAT, the system uses a single continuous test sequence that incorporates all necessary calibration and verification steps for multiple RATs, thereby reducing the overall complexity of the testing workflow.
Solution Approach 2:
While integrating multiple RAT tests into one sequence, the patent maintains internal segmentation by including distinct calibration signal portions for each RAT type within the unified sequence. This allows the complex multi-RAT testing to be organized into manageable, standardized segments that can be processed systematically without overwhelming the testing system.
3Measurement precision
If frequent setup and command sequences are performed for each RAT test, then proper calibration and verification can be achieved, but productivity decreases due to repeated configuration steps
Solution Approach 1:
The patent implements continuous testing action by eliminating idle setup time between RAT tests. The integrated test sequence flows continuously from one RAT calibration and verification to the next without requiring the tester to stop, reconfigure, or reset between tests. This continuous operation maintains measurement accuracy while dramatically improving productivity by removing non-value-added setup steps.
Solution Approach 2:
The patent performs preliminary configuration of the entire multi-RAT test sequence before execution begins. The tester is set up once with the integrated sequence that pre-includes all necessary calibration signals and verification steps for multiple RATs, eliminating the need for repeated setup actions during the actual testing process.
Data Source
AI summary
System and method for testing a radio frequency (RF) device under test (DUT) communicating using multiple radio access technologies (RATs). Single data signal sequences having characteristics of multiple RATs as prescribed by signal standards are exchanged between a tester and DUT. The tester and DUT process received signal sequences substantially in parallel with their reception. A pattern of contemporaneous signal sequence reception and processing continues for as many RATs as the DUT is capable of supporting.