Base Station Interference Detection via Idle Timeslot Sweeping
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Solution Overview
Problem
Existing methods for detecting spectrum interference in wireless broadband base stations are unable to detect unknown interference signals outside their receiving frequency band, limiting their effectiveness in frequency planning and operation.
Innovation Solution
An apparatus and method that reuse the existing receiving channel of a base station, utilizing a receiving antenna and additional modules for preprocessing and analyzing interference signals, including a broadband coupler, envelope detector, comparator, and radio frequency sampling unit, to identify frequency, amplitude, and communication mode of interference signals, enabling detection of unknown interference signals across a wide range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the existing base station receiving channel is used to detect interference signals, then the receiving antenna and normal receiving channel can be directly utilized, but the method is only capable of detecting interference signals within the receiving frequency band and cannot detect unknown interference signals outside this band
Solution Approach 1:
The receiving channel is designed to perform multiple functions: normal signal reception and interference signal detection. By configuring the receiving channel to operate in different modes (normal reception mode and interference detection mode), the system achieves multi-functionality without requiring separate dedicated detection hardware, thus resolving the contradiction between ease of manufacture and adaptability
Solution Approach 2:
The system dynamically adjusts the receiving channel configuration based on operational needs. During interference detection, the channel is reconfigured to sweep through different frequency bands beyond the normal receiving band. This dynamic reconfiguration enables the system to detect unknown interference signals across a wide frequency range while still utilizing the existing hardware infrastructure
2Measurement precision
If the receiving channel is reconfigured to detect unknown interference signals across a wide frequency range, then the detection capability is improved, but normal base station receiving and sending operations may be disrupted
Solution Approach 1:
The receiving channel performs interference detection periodically by sweeping through different frequency bands at scheduled intervals. During normal operation, the channel remains in reception mode. At predetermined times, it transitions to detection mode to scan for interference signals, then returns to normal reception. This periodic action ensures both reliable normal operation and comprehensive interference detection capability
Solution Approach 2:
The system performs interference detection in advance during idle timeslots or protection periods before normal communication operations begin. By detecting and identifying interference signals beforehand, the system can plan frequency usage and avoid disrupting normal operations, thus maintaining reliability while achieving precise measurement of interference signals
3Reliability
If interference detection is performed during idle timeslots, then normal operations are maintained, but the detection frequency and timeliness are limited
Solution Approach 1:
The receiving channel maintains continuous useful action by performing both normal reception and interference detection functions without complete idle periods. During normal reception, the channel continuously monitors for interference. During designated detection periods, it continuously sweeps through frequency bands. This continuous operation in both modes ensures both operational reliability and high detection frequency
Data Source
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AI summary
An apparatus and a method for detecting spectrum interference are described. The apparatus includes: a receiving antenna, configured to receive a spatial signal; a normal signal processing unit, configured to perform wave filtering and low-noise amplification for the normal signal received by the receiving antenna, and to send the processed normal signal to a radio frequency channel processing unit; an interference signal processing unit, configured to preprocess the interference signal received by the receiving antenna, and to send the preprocessed interference signal to the radio frequency channel processing unit; the radio frequency channel processing unit, configured to perform radio frequency processing for the received normal signal, and to perform radio frequency processing for the preprocessed interference signal in an idle timeslot; a radio frequency sampling unit, configured to perform, according to an input sampling clock, radio frequency sampling for the normal signal performed the radio frequency processing, to perform radio frequency sampling for the interference signal performed the radio frequency processing in an idle timeslot, and to send the interference signal performed the radio frequency sampling to an interference signal detecting unit; and the interference signal detecting unit, configured to perform fast Fourier transform in a digital domain for the interference signal performed the radio frequency sampling, to perform frequency band identification, and to acquire a communication mode of the interference signal.