Repeater Software-Defined Filtering for Near-Far Interference
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Solution Overview
Problem
Existing signal boosters and repeaters face challenges in addressing near-far problems due to inflexible pass bandwidths in analog channelized filtering and high costs and dynamic range limitations in digital channelized filtering, leading to difficulties in managing adjacent-channel interference and co-channel interference.
Innovation Solution
Implementing a software-defined filtering (SDF) module that combines analog and digital filters, using digital signal processors and digital baseband filters to perform digital processing, allowing for dynamically adjustable passbands and automatic gain control on a per-frequency range basis, and employing rotarized or motorized antennas for signal steering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If analog channelized filtering is used, then the passband is fixed and simple to implement, but it cannot dynamically adjust to different frequency ranges and causes near-far problems
Solution Approach 1:
The patent replaces traditional analog mechanical filtering systems with software-defined digital filtering. The SDF module uses digital signal processing to dynamically adjust passbands through software control, eliminating the need for physical filter reconfiguration while achieving adaptive frequency selection and resolving near-far interference problems.
Solution Approach 2:
The patent implements dynamic passband adjustment by making the filtering characteristics changeable through software control. The SDF module can dynamically reconfigure which frequency ranges are passed or blocked based on real-time conditions, allowing the system to adapt to different operational scenarios and resolve near-far problems.
2Reliability
If digital channelized filtering is used, then dynamic range is improved, but cost increases and dynamic range limitations remain
Solution Approach 1:
The patent implements a universal SDF module that can handle multiple frequency ranges and filtering requirements through software reconfiguration. This single multi-functional module replaces the need for multiple specialized digital filters, reducing overall system cost while maintaining high reliability and dynamic range performance across different operational modes.
3Object-affected harmful factors
If traditional filtering is used, then adjacent-channel and co-channel interference cannot be effectively managed, but simpler systems are cheaper
Solution Approach 1:
The patent applies local quality by implementing channel-specific filtering characteristics within the SDF module. Each frequency range can have customized filtering parameters optimized for its specific interference conditions, allowing precise targeting of adjacent-channel and co-channel interference while maintaining simplicity in the overall system architecture through software control.
Data Source
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AI summary
Technology for a repeater is disclosed. The repeater can include a first antenna port and a second antenna port. The repeater can include a first uplink analog signal amplification and filtering path and a second uplink analog signal amplification and filtering path. The repeater can include a first downlink analog signal amplification and filtering path and a second downlink analog signal amplification and filtering path. The repeater can include an uplink software-defined filtering (SDF) module and a downlink SDF module.