LTE Primary Synchronization Detection Without Stored Local Sequences
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Solution Overview
Problem
The existing LTE system faces high storage overhead during the initial cell search process due to the traditional method of generating and storing local primary synchronization sequences.
Innovation Solution
A method and device that directly generate a local primary synchronization signal sequence with equal amplitude in the time domain, reducing storage requirements and computational complexity by avoiding IFFT operations, and employing multi-channel parallel detection for enhanced robustness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the traditional method of generating and storing local primary synchronization sequences is used, then the detection function is achieved, but the storage overhead becomes too high
Solution Approach 1:
The patent extracts only the essential phase information from the complex synchronization sequence, discarding the unnecessary amplitude variations. By taking out only the phase components and using them to generate simplified local sequences, the storage requirement is dramatically reduced while maintaining the core detection functionality.
Solution Approach 2:
The patent changes the parameter representation from complex amplitude-based sequences to simplified phase-based sequences. By transforming the synchronization sequence into a form that only stores phase information rather than full amplitude data, the storage overhead is reduced while preserving the essential detection capability through matched filtering.
2Productivity
If the traditional IFFT-based sequence generation method is used, then the primary synchronization signal is generated, but the computational complexity increases
Solution Approach 1:
The patent extracts and eliminates the computationally intensive IFFT operation from the sequence generation process. By directly constructing the local synchronization sequence in the time domain using simple phase rotation operations rather than transforming from frequency domain, the computational complexity is significantly reduced while maintaining detection performance.
Solution Approach 2:
Instead of using the conventional IFFT-based approach to generate the synchronization sequence, the patent inverts the approach by directly generating the sequence in the time domain through phase rotation operations. This inversion of the generation methodology eliminates the need for complex Fourier transforms and reduces computational burden.
Data Source
AI summary
The present invention discloses a method and a device for detecting a primary synchronization signal and generating a sequence in a LTE system, so as to solve the problem that the overhead for 3GPP LTE system to store a local primary synchronization sequence is too much during the initial cell search process. The method for detecting a primary synchronization signal includes: directly generating a local primary synchronization signal sequence with equal amplitude in the time domain as a matched filter; performing a front-end processing for a received signal; performing the matched filtering between the received signal after the front-end processing and the local primary synchronization signal sequence; judging the output amplitude of the signal sequence obtained after the matched filtering; and then obtaining a judgment result of the local primary synchronization signal sequence.