Intra-cell Interference Suppression in PRISM Signal Processing
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Solution Overview
Problem
Conventional interference suppression methods in wireless networks primarily focus on inter-cell interference, leaving intra-cell interference unaddressed until downstream processing, which increases processing costs and complexity, and may not guarantee convergence due to non-diagonal matrix inversion and constant weighting factors.
Innovation Solution
Incorporating an intra-cell interference suppression module within the PRISM to address intra-cell interference upstream, and employing variable-weight-based alpha-beta and Gauss-Seidel iterations to improve convergence and reduce processing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional interference suppression methods focus only on inter-cell interference, then inter-cell interference is suppressed, but intra-cell interference remains unaddressed until downstream processing, increasing processing costs and complexity
Solution Approach 1:
The interference suppression function is segmented into two distinct modules: an inter-cell interference suppression module and an intra-cell interference suppression module. This segmentation allows each module to specialize in suppressing specific types of interference, with the intra-cell module handling intra-cell interference upstream before downstream processing, thereby reducing downstream processing complexity while maintaining comprehensive interference suppression.
2Ease of manufacture
If conventional methods use constant weighting factors and non-diagonal matrix inversion, then implementation is simpler, but convergence is not guaranteed
Solution Approach 1:
The weighting factors are transformed from constant to dynamic variables that adapt during the interference suppression process. The intra-cell interference suppression module employs iterative algorithms with dynamically adjusted weighting factors that converge based on the actual interference conditions, ensuring both reliability through guaranteed convergence and improved performance while maintaining reasonable implementation complexity.
3Productivity
If intra-cell interference is addressed upstream in the PRISM, then downstream processing costs are reduced, but the PRISM structure becomes more complex
Solution Approach 1:
The intra-cell interference suppression module is merged into the existing PRISM structure, integrating the new functionality with the inter-cell interference suppression module. This merging allows both interference suppression functions to operate within a unified upstream processing framework, reducing downstream processing costs while managing PRISM structure complexity through integrated design.
Data Source
AI summary
Various embodiments are directed towards suppressing inter-cell and intra-cell interference. In some embodiments, an intra-cell interference signal for a specified rake finger is received. An inter-cell interference signal is received. The intra-cell interference signals upstream of a chip-level equalizer are suppressed. The inter-cell interference signals upstream of the chip-level equalizer are suppressed.