Receiver Synchronization Logic for Asynchronous Interference Mitigation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in detecting and mitigating inter-cell interference, especially when signals are asynchronously received, leading to reduced signal-to-noise ratio (SNR) and data throughput due to the complexity of signal processing and the need for large channel windows.
Innovation Solution
A communication unit with detector logic that processes composite signals as if asynchronously received interfering signals were synchronously received, using synchronization and channel estimation logic to adjust timing and discard interfering signals, allowing for joint detection and improved SNR.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If advanced signal processing techniques are used to detect and mitigate asynchronous inter-cell interference, then interference mitigation capability is improved, but device complexity increases significantly
Solution Approach 1:
The patent applies preliminary action by performing channel estimation and timing synchronization for interfering signals before the actual detection process. The receiver estimates channels for both desired and interfering signals, and determines timing offsets in advance, which simplifies the subsequent detection operation and reduces real-time processing complexity while maintaining reliable interference mitigation
Solution Approach 2:
The patent segments the interference mitigation process into distinct stages: channel estimation for desired and interfering signals, timing offset determination, and detection. By dividing the complex asynchronous interference mitigation into manageable segments, the system reduces overall computational complexity while achieving reliable signal detection
2Measurement precision
If the receiver processes asynchronous interfering signals with full timing accuracy, then detection precision is improved, but processing time increases
Solution Approach 1:
The patent applies partial action by estimating timing offsets within a predefined search window rather than performing exhaustive search over all possible delays. The receiver determines timing offsets by searching within a limited range around expected values, achieving sufficient detection accuracy without the time cost of complete precision
3Adaptability or versatility
If the system accommodates large propagation delays from distant cells, then adaptability is improved, but channel window size must increase leading to higher complexity
Solution Approach 1:
The patent applies dynamics by making the channel window size adaptive rather than fixed. The receiver adjusts the channel window size based on the maximum expected propagation delay from distant cells, allowing the system to accommodate varying coverage areas and cell distances while maintaining optimal processing complexity for each specific scenario
Data Source
AI summary
A communication unit comprises a receiver for receiving a composite communication signal that comprises a desired signal and at least one asynchronously received interfering signal. The receiver comprises detector logic arranged to detect and process the composite communication signal as if the at least one asynchronously received interfering signal were synchronously received with the desired signal.