Local oscillator leakage signal detection method, suppression method, terminal and storage medium
By actively adjusting the radio frequency to ensure that the frequency difference is greater than the threshold, the problem of misjudgment of local oscillator leakage signal in the zero intermediate frequency scheme is solved, achieving accurate detection and real-time monitoring, and reducing resource consumption.
CN115514433BActive Publication Date: 2026-07-07ZTE CORP
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ZTE CORP
- Filing Date
- 2021-06-22
- Publication Date
- 2026-07-07
AI Technical Summary
Technical Problem
The detection of local oscillator leakage signal in existing zero intermediate frequency (IF) schemes suffers from misjudgment, especially under temperature changes, which can lead to bit errors or link breaks.
Method used
By actively adjusting the radio frequency of the local radio frequency signal to make the frequency difference between it and the remote radio frequency signal greater than a preset threshold, the frequency difference is always greater than the threshold under temperature changes, thus avoiding misjudgment.
Benefits of technology
It achieves accurate detection of local oscillator leakage signals, avoids misjudgment, saves resources and time, and can monitor MSE indicators in real time.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN115514433B_ABST
Abstract
This invention discloses a method for detecting and suppressing local oscillator leakage signals, a terminal, and a storage medium. The detection includes: receiving a first radio frequency (RF) signal transmitted from a first AOU; adjusting the RF frequency of a second RF signal from a second AOU so that the frequency difference between the adjusted second RF signal and the first RF signal is greater than a first preset threshold; and detecting local oscillator leakage signals in the first RF signal when the frequency difference is greater than the first preset threshold. This allows the local end to accurately detect local oscillator leakage in the RF signal from the peer, avoiding misjudgments. The suppression includes: judging by the MSE index after demodulation at the local end, using whether the MSE index is affected by the DC component value superimposed on the baseband unit's orthogonal signal in the same direction on the peer device, to suppress local oscillator leakage at the peer. This not only saves a significant amount of manpower, resources, and time, but also allows for real-time monitoring. Using the final MSE index of point-to-point communication as the judgment standard, it effectively solves the problems of misjudgment and failure.
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