Synchronization Signal Detection via Segmented Correlation
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Solution Overview
Problem
Mobile communications protocols face challenges in identifying synchronization signals, particularly in low signal-to-noise ratios and fading environments, which are computationally expensive and drain battery life.
Innovation Solution
A method and system for detecting synchronization signals by processing received signals and candidate synchronization signals to obtain correlation signals, selecting the most correlated candidate signal, and synchronizing with it, using techniques like cross-correlation in both time and frequency domains to reduce computational complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional synchronization signal detection methods are used, then detection accuracy is maintained, but computational complexity increases and battery life decreases
Solution Approach 1:
The patent segments the synchronization signal detection process into distinct phases: initial correlation computation, peak detection, and verification. By dividing the computational task into manageable segments with selective execution, the system maintains detection accuracy while reducing overall computational complexity and energy consumption.
Solution Approach 2:
The patent implements partial action by performing correlation computations only for a limited set of candidate positions rather than exhaustive search. The system computes correlations at predetermined positions and selectively verifies peaks only when necessary, avoiding excessive computation while maintaining reliable detection in challenging environments.
2Reliability
If traditional synchronization signal detection methods are used, then detection accuracy is maintained, but processing time increases
Solution Approach 1:
The patent performs preliminary actions by pre-computing correlation values at predetermined candidate positions before exhaustive search is needed. The system prepares correlation data in advance and uses it to quickly identify potential synchronization signal locations, significantly reducing processing time while maintaining detection accuracy.
Solution Approach 2:
The patent extracts and processes only the most relevant correlation peaks that meet predetermined thresholds, ignoring irrelevant computations. By taking out only the necessary verification steps and discarding unnecessary candidate positions, the system reduces processing time while maintaining reliable detection.
3Reliability
If comprehensive correlation computation is performed, then synchronization signal detection reliability is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic processing complexity that adapts to signal conditions. The system starts with simpler correlation computations at predetermined positions and only engages more complex verification processes when initial results indicate potential synchronization signals. This dynamic approach maintains reliability while managing device complexity.
Solution Approach 2:
The patent applies local quality by concentrating computational resources only at candidate positions where synchronization signals are likely to be found, rather than uniformly processing all possible positions. The system enhances correlation computation quality locally at promising positions while using simpler methods elsewhere, reducing overall device complexity.
Data Source
AI summary
Systems and methods are provided for detecting a received synchronization signal. The method includes receiving, at a receiver, a signal from a transmitter and the signal includes the received synchronization signal. The method includes processing the received signal and a plurality of candidate synchronization signals to obtain a plurality of correlation signals. Each candidate synchronization signal is associated with one of the plurality of correlation signals. The method includes selecting, based at least in part on the plurality of correlation signals, one of the plurality of candidate synchronization signals. The selected candidate synchronization signal is correlated with the received synchronization signal. The method includes detecting the received synchronization signal based at least in part on (i) the received signal, and (ii) a characteristic obtained from the correlation signal that is associated with the selected candidate synchronization signal.