PSS Sequence Detection Using Segmented Correlation and Peak Search
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Solution Overview
Problem
Existing PSS detection methods suffer from poor configurability and reusability, leading to high calculation and storage overheads, and reduced detection efficiency due to inflexible resource allocation and large frequency offsets.
Innovation Solution
A method and apparatus that configures search parameters based on specific scenarios, performs PSS correlation calculations, and selects the PSS sequence based on peak values, utilizing flexible resource allocation and segmented correlation to enhance detection efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sliding correlation method of preset frequency offset is adopted to handle frequency fluctuation, then frequency offset compensation is achieved, but calculation amount and storage amount increase proportionally with the preset frequency offset
Solution Approach 1:
The patent segments the frequency offset compensation process into two stages: first performing correlation calculation without frequency offset compensation to obtain preliminary correlation values, then performing frequency offset compensation only on these correlation values. This segmentation reduces the calculation and storage requirements compared to applying frequency offset compensation throughout the entire correlation process.
Solution Approach 2:
The patent performs preliminary correlation calculation before applying frequency offset compensation. By completing the correlation operation first and then compensating for frequency offset on the resulting correlation values, the system avoids the computational overhead of applying frequency offset adjustments during every stage of the correlation process.
2Reliability
If fixed PSS detection apparatus is used for each carrier, then detection function is provided, but resource configurability and reusability are poor
Solution Approach 1:
The patent designs a unified PSS detection apparatus that can handle multiple carriers and different search scenarios (initial cell search and cell camping) through configurable parameters. The same hardware resources are reused across different carriers and scenarios by dynamically adjusting detection parameters, eliminating the need for separate fixed detection apparatus for each carrier.
Solution Approach 2:
The patent introduces dynamic configurability to the PSS detection apparatus, allowing detection parameters such as frequency points, correlation lengths, and search spaces to be adjusted based on the current carrier and search scenario. This dynamic adaptation enables the same apparatus to efficiently handle varying detection requirements without being locked into fixed configurations.
3Reliability
If conventional PSS detection method is used, then detection process is completed, but detection efficiency is low due to large fluctuation in frequency and poor resource allocation
Solution Approach 1:
The patent optimizes detection efficiency by dynamically adjusting key parameters including correlation length, search space configuration, and frequency point selection based on the specific carrier and search scenario. These parameter changes enable the detection process to adapt to varying conditions, reducing unnecessary computations and improving overall detection speed and efficiency.
Data Source
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AI summary
Embodiments of the present invention provide a method and an apparatus for detecting a Primary Synchronization Signal, PSS, sequence. The detection method comprises: configuring a search parameter based on a search scenario of the Primary Synchronization Signal, PSS, sequence; performing PSS correlation calculation on resources invoked based on the search parameter; and performing period accumulation based on correlation values from the PSS correlation calculation, then performing peak search, and selecting a corresponding PSS sequence based on a peak value, so as to complete detection of the PSS sequence.