Baseband Self-Interference Channel Estimation for Full Duplex
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Solution Overview
Problem
In wireless full duplex communications, self-interference poses a challenge in accurately estimating the response of the baseband self-interference channel, affecting the precision of interference cancellation and thus the quality of received signals.
Innovation Solution
A method and apparatus that estimate the response of the baseband self-interference channel by determining a parameter related to residual interference, adjusting the time and frequency domain resources of the baseband estimation signal to improve estimation precision, and dynamically adapting the frequency domain density based on interference power thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the time and frequency domain resources for sending the baseband estimation signal are not properly selected, then the complexity of the estimation process is reduced, but the precision of the estimated response of the baseband self-interference channel deteriorates
Solution Approach 1:
The patent adjusts time domain resources (such as selecting specific time slots or symbols) and frequency domain resources (such as selecting specific subcarriers or resource blocks) for sending the baseband estimation signal. By optimizing these resource parameters, the precision of the estimated channel response is improved while managing the complexity of the estimation process.
2Measurement precision
If the frequency domain density of the baseband estimation signal is increased, then the precision of the estimated response is improved, but the resource consumption increases
Solution Approach 1:
The patent dynamically adjusts the frequency domain density of the baseband estimation signal based on channel conditions, interference levels, and resource availability. This dynamic adaptation allows the system to achieve high estimation precision when needed while conserving resources under different operating conditions, resolving the contradiction between precision and resource consumption.
3Reliability
If the baseband self-interference cancellation is performed with high precision, then the signal quality is improved, but the processing complexity increases
Solution Approach 1:
The patent performs preliminary estimation of the baseband self-interference channel response using optimized time and frequency domain resources before the actual signal reception. By having the channel response estimation ready in advance, the subsequent self-interference cancellation process can be performed more efficiently with reduced real-time processing complexity while maintaining high signal quality.
Data Source
AI summary
The embodiments of present disclosure provide a method for estimating a response of a baseband self-interference channel and an apparatus, where the method includes: estimating a response of a baseband self-interference channel to obtain a first estimation response of the baseband self-interference channel; starting to perform first full duplex communication; canceling baseband self-interference in a first baseband received signal according to the first estimation response, where the first baseband received signal is a baseband signal received during the first full duplex communication; determining a first parameter of the baseband self-interference channel; determining an estimation policy of the baseband self-interference channel according to the first parameter; and estimating the response of the baseband self-interference channel according to the estimation policy.