Wireless Interference Cancellation via Preconfigured Constellation Sets
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, particularly in cell edge areas, terminals face challenges in improving reception performance due to complex interference signals, which increases the complexity of acquiring necessary interference signal information, limiting the effectiveness of interference cancellation methods.
Innovation Solution
A method and apparatus that allow a terminal to acquire interference signal information based on a preconfigured constellation set without support from a serving base station, enabling interference signal cancellation by classifying and decoding interference signals using precoding symbol units, reducing complexity and improving reception performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal acquires interference signal information to improve reception performance, then the reception performance is improved, but the complexity of acquiring interference signal information increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring constellation sets that correspond to multiple possible interference signal patterns before the terminal needs to acquire interference information. The terminal stores these pre-defined constellation sets locally, so when interference is detected, the terminal can directly compare the received signal against these pre-prepared patterns to identify and cancel interference without performing complex real-time analysis. This pre-computation and storage of interference patterns significantly reduces the complexity of interference acquisition while maintaining effective interference cancellation capability.
2Reliability
If joint detection and interference cancellation methods are used, then reception performance in cell edge areas is improved, but the computational complexity and processing requirements increase
Solution Approach 1:
The patent applies copying by creating simplified representations of interference signals through constellation sets that capture the essential characteristics of interference patterns. Instead of performing full joint detection that would require complex iterative optimization, the terminal copies the interference signal's constellation structure into pre-defined patterns, then uses these simplified copies for comparison and cancellation. This copying approach maintains the effectiveness of interference cancellation while dramatically reducing computational complexity by working with pre-computed constellation representations rather than raw signal processing.
3Reliability
If the terminal processes multiple types of interference signal information, then the interference cancellation effectiveness is improved, but the time and resources required for processing increase
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple constellation sets that represent different interference signal types, patterns, and characteristics before the terminal needs to process interference. These pre-computed constellation sets are stored in the terminal's memory, allowing the terminal to quickly compare received signals against multiple interference patterns simultaneously without performing time-consuming real-time analysis for each pattern. This pre-preparation enables the terminal to effectively handle multiple interference types while minimizing processing time.
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
A method and an apparatus in a wireless communication system are provided. The method includes storing a pre-configured constellation set, receiving a signal from a base station, identifying a constellation among the pre-configured constellation set by selecting the constellation having a signal distribution associated with an interference target signal, acquiring interference signal information on the received signal based on the identified constellation; and decoding the received signal based on the acquired interference signal information.