Signal Analysis Device Time Domain OFDM Segmentation
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Solution Overview
Problem
Existing signal analysis devices for mobile terminals lack the ability to analyze signal data in the time domain, making it difficult to identify specific issues within the communication status of input modulation signals.
Innovation Solution
A signal analysis device that receives and analyzes signal data using the OFDM method, calculating and displaying analysis results for each time domain, allowing for the identification of communication status and abnormal parts within these domains.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If signal analysis is performed only for overall normality determination, then the analysis result is simple and easy to display, but the problematic part cannot be specified in detail
Solution Approach 1:
The patent segments the signal data into multiple time domains based on OFDM symbols, allowing detailed analysis of each time domain while maintaining overall structure. The analysis unit divides the received signal into multiple time domains and calculates analysis results for each domain separately, enabling precise identification of problematic parts without overwhelming display complexity.
Solution Approach 2:
The patent introduces a time domain dimension to the signal analysis by utilizing OFDM symbol structure. Instead of analyzing only overall signal normality, the system adds temporal resolution by analyzing each time domain (OFDM symbol) separately, transforming the analysis from a single-dimensional overall assessment to a multi-dimensional time-resolved analysis.
2Difficulty of detecting and measuring
If time domain analysis is added to signal analysis, then the ability to specify abnormal parts is improved, but the device complexity increases
Solution Approach 1:
The analysis unit performs multiple functions by utilizing the same time domain segmentation approach for various analysis items (EVM, frequency offset, carrier frequency offset, etc.). The universal time domain division mechanism can be applied to different analysis parameters without requiring separate complex processing for each item, reducing overall device complexity while improving abnormality detection capability.
Solution Approach 2:
The patent changes the analysis parameter from overall signal quality to time-domain-specific parameters. By calculating analysis results for each time domain (OFDM symbol) separately, the system transforms single-parameter overall analysis into multi-parameter time-resolved analysis, improving detection capability while managing complexity through systematic parameter organization.
3Loss of information
If multiple analysis results are displayed simultaneously, then comprehensive information is provided, but the operator cannot easily identify specific problematic areas
Solution Approach 1:
The display unit segments the presentation of analysis results by time domain, allowing operators to view and compare results across different time domains systematically. The segmented display structure organizes multiple analysis results in a way that highlights temporal variations and makes it easier to identify which specific time domains contain abnormalities.
Solution Approach 2:
The system provides feedback by displaying analysis results for each time domain, enabling operators to immediately identify problematic areas and understand the temporal distribution of abnormalities. This feedback mechanism allows operators to focus on specific time domains with issues rather than searching through comprehensive data, improving operational convenience while maintaining information completeness.
Data Source
AI summary
The base station simulator 10 as a signal analysis device performs communication with a UE 70 by simulating a base station to test an operation of a communication function of the UE 70, and includes a reception unit 21a that receives a signal to be measured modulated by an OFDM method, transmitted from the UE 70, an analog signal processing unit 22 that calculates signal data of the signal to be measured received by the reception unit 21a, a data analysis unit 27c that analyzes the signal data for a predetermined analysis item for each time domain defined by the OFDM method, and calculates analysis results of a plurality of analysis items corresponding to each time domain, and an analysis result display unit 28c that displays the analysis results of the plurality of analysis items side by side.