Downlink Acquisition Signal Interference Cancellation
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Solution Overview
Problem
Wireless communication systems face challenges in reducing interference on downlink acquisition signals, particularly in LTE technology, which affects the reliability and efficiency of mobile broadband access as demand increases.
Innovation Solution
A method and apparatus for wireless communication that involves channel estimation, component signal removal, and residual signal detection to mitigate interference, using techniques such as channel estimation schemes, processed signal generation, and residual signal detection to improve signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional downlink acquisition signals are used in LTE systems, then system compatibility and standard adherence are maintained, but interference from multiple cells degrades signal detection reliability
Solution Approach 1:
The patent extracts and removes the interfering component signal from the received signal. By identifying the interfering signal characteristics and subtracting it from the composite received signal, the method isolates the desired signal from the serving cell, thereby improving detection reliability in multi-cell environments.
Solution Approach 2:
The patent introduces channel estimation as an intermediary process. By estimating the channel response between the serving cell and the user equipment, the system can compensate for channel effects on the desired signal while distinguishing it from interfering signals, thus improving signal detection reliability without violating LTE standards.
2Reliability
If interference cancellation techniques are applied to downlink acquisition signals, then signal detection reliability improves, but processing complexity increases
Solution Approach 1:
The patent segments the signal processing into distinct stages: channel estimation, interfering signal identification, component signal removal, and residual signal detection. This segmentation allows each processing step to be optimized independently and facilitates implementation in existing LTE infrastructure without requiring complete system redesign.
Solution Approach 2:
The patent performs channel estimation as a preliminary action before signal detection. By pre-characterizing the channel response, the system establishes a foundation for subsequent interference cancellation operations, making the overall process more efficient and manageable despite the increased complexity.
3Manufacturing precision
If component signals are removed from received signals to generate processed signals, then interference is reduced and signal quality improves, but measurement and detection difficulty increases
Solution Approach 1:
The patent implements a feedback mechanism where the detected residual signal is used to verify and refine the interference cancellation process. By monitoring the residual signal characteristics after component removal, the system can assess the effectiveness of interference cancellation and adjust processing parameters to optimize signal quality while managing detection complexity.
Data Source
AI summary
A method, an apparatus, and a computer program product for receiving a signal including components from a plurality of cells, estimating a channel from the received signal using one or more channel estimation schemes, removing a component signal using the estimated channel from the received signal to generate a processed signal and detecting a residual signal in the processed signal.