Multi-Antenna Interference Elimination via Cross-Correlation Matrix
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Solution Overview
Problem
The Minimum Mean Squared Error (MMSE) equalizer in existing multi-antenna systems does not consider the correlation between transmitted signals on multiple antennas, leading to undesirable equalization effects and low receiver performance.
Innovation Solution
An interference elimination method and apparatus that generates an equalization coefficient based on the baseband signal, channel estimation matrix, and cross-correlation matrix of transmitted signals on multiple antennas, accounting for the correlation between signals to perform interference elimination processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional MMSE equalizer is used to eliminate interference, then the equalization process is simple, but the equalization effect is undesirable and receiver performance is low due to ignoring signal correlation
Solution Approach 1:
The patent changes the parameters of the equalization process by introducing the cross-correlation matrix of transmitted signals and the channel estimation matrix into the equalization coefficient calculation. This transforms the conventional MMSE equalizer into an enhanced version that accounts for signal correlation between multiple antennas, thereby improving receiver performance while maintaining computational feasibility through structured matrix operations.
2Reliability
If interference elimination is performed without considering signal correlation, then the processing is faster and simpler, but interference is not effectively eliminated
Solution Approach 1:
The patent performs preliminary actions by pre-calculating the cross-correlation matrix of transmitted signals and the channel estimation matrix before the actual equalization process. These pre-computed matrices are then used in the equalization coefficient calculation, which efficiently eliminates interference by incorporating signal correlation information without requiring complex real-time computations during the equalization process.
Data Source
AI summary
Embodiments of the present invention disclose an interference elimination method and apparatus for a multi-antenna system. The method includes: generating an equalization coefficient according to a baseband signal received on a receiving antenna, a channel estimation matrix, and an obtained cross-correlation matrix of transmitted signals of a downlink channel on multiple transmit antennas; and performing interference elimination processing on the baseband signal according to the equalization coefficient.