Signal Grouping for UE Simulation Antenna Sharing
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Solution Overview
Problem
Existing UE simulation devices face distortion issues when outputting a large quantity of UE signals from an air interface due to limited antennas, causing low-power signals to fail decoding and affecting network stability testing.
Innovation Solution
A signal output method and apparatus that groups UE signals with similar powers and combines them for output using one antenna, ensuring a peak-to-average power ratio (PAPR) within a specified threshold to prevent distortion, utilizing a virtual user equipment module, channel simulation, signal grouping, and radio frequency modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a large quantity of UE signals are combined and sent through one antenna, then the limited antennas can support more simulated UE signals, but the quantization error of high-power signals covers low-power signals causing distortion
Solution Approach 1:
The patent segments the combined signal into multiple sub-signals based on power levels. Each sub-signal is processed separately through individual digital-to-analog converters, preventing quantization errors from high-power signals from covering low-power signals. This segmentation allows the system to maintain signal quality while supporting a large quantity of simulated UE signals through limited antennas.
2Adaptability or versatility
If multiple UE signals are combined for output through limited antennas, then antenna utilization is improved, but decoding of low-power signals fails due to distortion
Solution Approach 1:
The patent dynamically adjusts the processing approach based on signal power levels. By classifying signals into different power levels and processing them through different paths (direct combination for high-power signals, segmented processing for low-power signals), the system maintains reliable decoding accuracy while achieving high antenna utilization. The dynamic adaptation allows flexible handling of varying signal conditions.
3Measurement precision
If high-power UE signals are processed with high quantization precision, then their accuracy is maintained, but low-power UE signals suffer from quantization error coverage and distortion
Solution Approach 1:
The patent applies different processing qualities to different signal components based on their local characteristics. High-power signals are processed through standard combination paths, while low-power signals are extracted, processed separately with dedicated digital-to-analog conversion, and recombined. This local quality differentiation ensures that each signal receives appropriate processing precision, preventing information loss in low-power signals while maintaining overall system efficiency.
Data Source
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AI summary
The present invention discloses a signal output apparatus, a board, and a signal output method. UE signals to be output are grouped, and UE signals having similar powers are combined and are then output by using one same antenna. This resolves a problem that a low-power UE signal is distorted when a large quantity of UE signals are output from an air interface.