Digital Domain Self-Interference Cancellation for Multi-RRU Full Duplex Systems
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Solution Overview
Problem
Current digital domain self-interference cancellation methods for Co-time Co-frequency Full Duplex (CCFD) systems can only cancel self-interference signals for a single remote radio unit, leading to high distributed deployment costs for systems with multiple remote radio units.
Innovation Solution
A digital domain self-interference cancellation method and apparatus that generates a scrambling signal based on a first information source and sends it to multiple remote radio units, allowing for the cancellation of self-interference signals across multiple units by performing correction operations on a preset reference cancellation signal to obtain a target cancellation signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If digital domain self-interference cancellation is performed on each remote radio unit individually, then self-interference cancellation capability is achieved, but distributed deployment cost increases
Solution Approach 1:
The patent combines the self-interference cancellation functions of multiple remote radio units into a single centralized processing unit. Instead of each RRU performing independent cancellation, the system merges their functions so that one unit processes cancellation for all RRUs, reducing overall system complexity and deployment costs while maintaining the necessary self-interference cancellation capability across the distributed network.
Solution Approach 2:
The patent creates a universal self-interference cancellation apparatus that can serve multiple remote radio units simultaneously. This multi-functional device performs cancellation operations for the entire CCFD system rather than being dedicated to a single RRU, thereby reducing the number of required components and lowering distributed deployment costs while ensuring reliable interference cancellation across all units.
2Productivity
If multiple remote radio units are deployed in CCFD system, then spectrum utilization increases, but self-interference management complexity increases
Solution Approach 1:
The patent segments the self-interference management function from the remote radio units themselves, placing it in a dedicated centralized apparatus. This separation allows multiple RRUs to be deployed for improved spectrum utilization while the complex interference management is handled by a specialized unit designed specifically for that purpose, thereby managing complexity effectively.
Solution Approach 2:
The patent introduces a centralized self-interference cancellation apparatus as an intermediary between multiple remote radio units and the baseband unit. This mediator handles the complex task of coordinating and performing self-interference cancellation across all RRUs, allowing the system to support multiple units for high spectrum utilization without each unit needing to manage its own interference independently.
Data Source
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AI summary
Embodiments of the present disclosure relate to the technical field of network communications, and provide a digital domain self-interference cancellation method, a device, and a storage medium. The method comprises: generating a scrambling signal on the basis of a first information source inputted by a baseband unit by means of a fronthaul interface, and sending the scrambling signal to at least one remote radio unit; receiving a second information source sent by the remote radio unit on the basis of the scrambling signal, and performing a correction operation on a preset reference cancellation signal on the basis of the second information source to obtain a target cancellation signal; and performing self-interference cancellation processing on the second information source on the basis of the target cancellation signal to obtain a target information source.