LTE Interference Detection Using Signal Parameter Analysis
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Solution Overview
Problem
Mobile communication devices face significant performance degradation due to interference from neighboring devices and signals using different protocols, making prompt and accurate detection of interfering signals challenging, especially since reference signals may be periodic and limited, hindering identification of signal properties like transmission protocols.
Innovation Solution
A method and system for identifying whether a signal is an LTE signal by receiving and computing signal measurements, determining specific LTE standard parameters, and using these parameters to identify the signal, incorporating techniques such as peak-to-average power ratio and correlation measures to classify interference accurately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If reference signals are used to identify interfering signals, then measurement opportunities are limited and identification time increases, but if other general properties are measured, then the ability to identify specific signal properties like transmission protocol is lost
Solution Approach 1:
The patent performs preliminary classification of interfering signals by measuring general properties (signal strength, bandwidth, modulation type) before attempting detailed identification using reference signals. This preliminary action filters out signals that can be identified through general characteristics, reducing the need for time-consuming reference signal measurements and thereby decreasing overall identification time while maintaining accuracy.
2Measurement precision
If multiple measurement techniques are used to identify signal properties, then identification accuracy improves, but system complexity increases
Solution Approach 1:
The patent implements a dynamic measurement system that adapts the measurement technique based on the characteristics of the received signal. The system first performs general property measurements, and only if those measurements are insufficient for definitive identification, it proceeds to more complex reference signal-based measurements. This dynamic approach maintains high identification accuracy while minimizing the complexity burden by applying sophisticated measurements only when necessary.
3Loss of information
If reference signals with certain periodicity are used, then signal identification becomes possible, but the number of measurement opportunities is limited
Solution Approach 1:
The patent employs multiple measurement techniques that serve different functions: general property measurements (signal strength, bandwidth, modulation type) that can be performed frequently on any signal, and reference signal-specific measurements that provide definitive identification capability. By making the general measurement system universal and applicable to all signals regardless of reference signal presence or periodicity, the system increases measurement opportunity frequency while maintaining the ability to identify signal properties when reference signals are available.
Data Source
AI summary
Systems and methods are provided for identifying whether a signal is an LTE signal. The method includes receiving, using control circuitry, a signal. The method includes computing a measurement of the received signal, determining a signal parameter corresponding to a system parameter specific to an LTE standard, and identifying whether the received signal is an LTE signal based on the determined signal parameter.