PSS Detection Using Dynamic Thresholding and Segmented Correlation
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Solution Overview
Problem
Current 5G communication systems face challenges in efficiently detecting Primary Synchronization Signals (PSS) due to high latency, which is exacerbated by the need for multiple attempts and increased time consumption, especially at low Signal-to-Interference Plus Noise Ratio (SINR) conditions.
Innovation Solution
The implementation of methods such as probability detection values, sliding window techniques, weight assignments, and dynamic rewarding methods to enhance the detection of PSS by User Equipment (UE), reducing complexity and latency through distributed decision-making and adaptive weighting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If traditional PSS detection methods are used, then the detection process is simple, but the detection time and latency are high
Solution Approach 1:
The PSS detection process is segmented into multiple independent correlation operations, each comparing received signals with different candidate PSS sequences. This segmentation allows parallel processing and early termination when a match is found, reducing overall detection time while maintaining manageable complexity through modular design
Solution Approach 2:
The system performs preliminary correlation operations with multiple candidate PSS sequences in parallel before final synchronization is achieved. This preliminary action enables the system to quickly identify the correct sequence without requiring extensive search time, thereby reducing detection latency
2Reliability
If multiple correlation operations are performed to improve detection reliability, then detection accuracy improves, but processing complexity and time consumption increase
Solution Approach 1:
Multiple correlation operations are merged into a unified processing framework where different candidate PSS sequences are correlated with the received signal simultaneously. This merging approach maintains high reliability through comprehensive search while reducing processing complexity by sharing common resources such as the received signal buffer and correlation function
Solution Approach 2:
The correlation function is designed with multi-functionality to handle multiple PSS sequence candidates within a single processing framework. This universal approach allows the system to maintain detection reliability across different scenarios without proportionally increasing processing complexity, as the same core function serves multiple purposes
3Speed
If the detection threshold is set low to detect PSS quickly, then detection speed improves, but false detection rate increases
Solution Approach 1:
The detection threshold is made dynamic rather than fixed, adapting to the specific correlation output characteristics of each candidate PSS sequence. This dynamic thresholding allows the system to maintain fast detection by using lower thresholds when confidence is high, while preventing false detections by raising thresholds when uncertainty exists, thus balancing speed and accuracy
Data Source
Figure 1A
Figure 1B
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AI summary
The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4th-Generation (4G) communication system such as long-term evolution (LTE). Methods and devices are provided for detecting a synchronized primary synchronization signal (PSS) sequence in a wireless network is provided. A device receives a synchronization signal including a PSS sequence. The device determines a plurality of peak correlation values by correlating a plurality of predefined PSS sequences with time-shifted variants of the received synchronization signal. The device detects the synchronized PSS sequence from the plurality of predefined PSS sequences by analyzing the plurality of peak correlation values using at least one of probability detection values, a sliding window method, weight assignments, and a rewarding-based method.