Frequency-Selective Interference Filtering for 700 MHz Uplink Signals
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Solution Overview
Problem
Existing methods for addressing broadcast blocking interference in the 700 MHz frequency band, such as interference avoidance-RB disabling and deep filtering, suffer from increased uplink noise or loss of non-interference spectra, particularly in scenarios with discontinuous interference bandwidth.
Innovation Solution
An anti-interference control method that determines the start and end frequency points of an interference signal's bandwidth, allowing for precise deep filtering to isolate a non-interference signal by screening the target signal, enhancing anti-interference ability and improving spectrum utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If deep filtering is applied to remove interference signals, then anti-interference ability is improved, but non-interference spectra are lost
Solution Approach 1:
The frequency band is segmented into interference and non-interference portions using precise frequency point identification. By dividing the bandwidth into specific segments (interference start frequency to interference end frequency), the system can selectively filter only the contaminated portions while preserving clean spectra, thus resolving the contradiction between removing interference and retaining useful signals
Solution Approach 2:
The filtering operation is applied locally only to the identified interference frequency range rather than uniformly across the entire bandwidth. By concentrating the deep filtering action precisely where interference exists (between start and end frequency points), the system achieves effective interference removal while leaving non-interference spectra untouched, thereby maintaining both anti-interference ability and spectrum utilization
2Productivity
If frequency clearing is performed to migrate to 5G network, then network construction is enabled, but broadcast blocking interference increases
Solution Approach 1:
The system performs preliminary identification of interference frequency points (start and end frequencies) before executing the filtering operation. By pre-identifying the exact bandwidth occupied by broadcast signals, the system can then apply targeted deep filtering to clear these specific frequencies, enabling 5G network construction while systematically removing the resulting broadcast blocking interference through precise frequency-domain suppression
3Object-affected harmful factors
If interference avoidance-RB disabling is used, then interference impact is reduced, but uplink noise increases
Solution Approach 1:
The interference signal is extracted and removed from the composite signal by identifying its specific frequency boundaries (start and end frequency points). Instead of disabling resource blocks which causes uplink noise, the system extracts only the harmful interference components within the identified frequency range and removes them, thereby reducing interference impact while preserving uplink signal quality in the remaining frequency portions
Data Source
AI summary
The present application discloses an anti-interference control method, an electronic device, a base station, and a storage medium. The anti-interference control method comprises: if it is determined that an interference signal exists in target signals, acquiring a start frequency point and an end frequency point of the bandwidth of the interference signal (S110); and screening the target signals according to the start frequency point and the end frequency point to obtain a non-interference signal (S120).