LTE Cell Synchronization Detection Using Sampling Point Segmentation
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Solution Overview
Problem
Existing methods for detecting synchronization positions in LTE cells require a large number of calculation resources and result in high costs and power consumption due to the need for extensive correlation operations across all sampling points.
Innovation Solution
A method and apparatus that selectively perform correlation operations on a subset of sampling points, using a work window control unit to determine if the number of cells in the synchronization list is above a threshold, and if so, only process those points, or process all points if the threshold is not met, thereby reducing the number of correlation operations and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If correlation operations are performed on all sampling points to ensure accurate synchronization detection, then detection reliability is improved, but device complexity and power consumption increase
Solution Approach 1:
The patent segments the 9600 sampling points into multiple groups (e.g., 10 groups of 960 points each) and performs correlation operations on representative sampling points from each group rather than all points. This segmentation reduces the total number of correlation operations from 28800 to approximately 2880, while maintaining detection reliability through strategic selection of representative points from each segment.
Solution Approach 2:
The patent applies partial action by performing correlation operations on only a subset of sampling points (e.g., first sampling point of each group) rather than all points. This partial processing achieves sufficient synchronization detection accuracy while significantly reducing computational complexity and power consumption.
2Measurement precision
If correlation operations are performed on all sampling points to ensure comprehensive cell search, then detection accuracy is improved, but power consumption increases
Solution Approach 1:
The patent divides the sampling points into groups and selects representative points from each group for correlation operations. This segmentation approach maintains comprehensive cell search capability while reducing the number of operations from 28800 to approximately 2880, thereby significantly reducing power consumption.
Solution Approach 2:
The patent performs correlation operations on only a partial set of sampling points (e.g., first point of each group) rather than all points. This partial action achieves sufficient detection accuracy for synchronization position identification while reducing power consumption by approximately 90%.
3Manufacturing precision
If three correlation operations are performed on each of all 9600 sampling points to identify NID2 values, then sequencing accuracy is improved, but productivity decreases
Solution Approach 1:
The patent segments sampling points into groups and performs correlation operations on representative points from each group. This reduces the total operations from 28800 to approximately 2880, improving cell search speed by approximately 10 times while maintaining NID2 identification accuracy through proper segmentation and threshold comparison.
Data Source
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AI summary
The present invention provides a method and an apparatus for detecting a synchronization position of an LTE cell. A part of sampling points are selected from all sampling points of received data, where the received data is generated by filtering a local sequence from a base station; correlation operations are carried out on the part of the sampling points, and multiple first correlation results and multiple pieces of first position information that correspond to the part of the sampling points are obtained; and a maximum first correlation result is determined among at least one first correlation result greater than a preset threshold in the multiple first correlation results, and a piece of first position information, which corresponds to the maximum first correlation result, is taken as a synchronization position.