LTE Primary Synchronization Signal Sequence Generation
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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 local primary synchronization sequences, which also increases computational complexity.
Innovation Solution
A method and device that directly generate a local primary synchronization signal sequence with equal amplitude in the time domain, reducing storage needs and avoiding the IFFT operation, while performing front-end processing and matched filtering to detect the primary synchronization signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the traditional method of generating local primary synchronization sequences is used, then the detection performance is maintained, but the storage overhead and computational complexity increase
Solution Approach 1:
The patent extracts and removes the IFFT operation from the traditional synchronization sequence generation process. By directly generating the local primary synchronization sequence in the time domain without performing IFFT transformation, the system eliminates unnecessary computational steps while maintaining the essential detection functionality, thus reducing computational complexity and storage overhead
Solution Approach 2:
Instead of following the conventional approach of generating sequences in the frequency domain and then transforming to time domain via IFFT, the patent inverts the process by directly generating the synchronization sequence in the time domain. This reverse approach simplifies the overall processing chain and reduces the computational burden
2Ease of manufacture
If the IFFT operation is performed to generate local primary synchronization sequence, then the sequence is obtained, but the computational complexity increases
Solution Approach 1:
The patent removes the IFFT operation from the sequence generation process. By directly synthesizing the local primary synchronization sequence in the time domain using mathematical formulas, the system achieves the desired sequence generation capability without the computational overhead of frequency-to-time domain transformation
Solution Approach 2:
The patent uses a simplified mathematical model to directly generate the synchronization sequence characteristics without replicating the full IFFT process. The time-domain sequence is constructed using closed-form expressions that capture the essential properties of the synchronization signal without requiring complex transformation operations
Data Source
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Figure 2b~2c
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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.