Cell Search Circuit Hard Data Extraction for Memory Reduction
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Solution Overview
Problem
Mobile terminals face challenges in accurately detecting synchronization sequences in downlink signals due to noise and channel variations, leading to reduced accuracy in cell search and increased memory requirements for storing signal waveform data.
Innovation Solution
Extracting hard data from search probes, which includes discrete parameters like cell identity and timing information, to reduce memory usage and improve detection accuracy by discarding soft data, and using coherent and non-coherent averaging of detection results to enhance search accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If soft data from multiple search probes is stored for accurate cell detection, then detection accuracy is improved, but memory requirements increase
Solution Approach 1:
The patent extracts only the essential discrete parameters (cell identity, timing information) from the soft data while discarding the redundant soft data. This extraction process retains the critical information needed for accurate cell detection while significantly reducing the memory storage requirements.
Solution Approach 2:
The patent applies discarding and recovering by eliminating soft data after extracting the necessary discrete parameters. The system recovers and retains only the essential cell identification information, thereby reducing memory usage while preserving detection accuracy through coherent and non-coherent averaging of the extracted parameters across multiple search probes.
2Measurement precision
If multiple search probes are processed to improve detection accuracy, then cell search accuracy is improved, but processing time increases
Solution Approach 1:
The patent extracts discrete parameters from each search probe independently, allowing parallel processing of multiple probes. By extracting only the essential cell identity and timing information rather than processing entire soft data sets, the system reduces the time required to process multiple search probes while maintaining improved detection accuracy through averaging of the extracted parameters.
3Quantity of substance
If discrete parameters are extracted from search probes, then memory usage is reduced, but detection accuracy may deteriorate
Solution Approach 1:
The patent applies feedback through coherent and non-coherent averaging of the discrete parameters extracted from multiple search probes. This averaging process provides feedback that enhances detection accuracy by filtering out false positives and confirming real cell detections, thereby maintaining high detection accuracy despite using only extracted discrete parameters rather than full soft data.
Data Source
AI summary
A mobile communication device may include a cell search circuit configured to process a first block of signal waveform data to extract a first discrete parameter set, wherein the first discrete parameter set identifies one or more first potential cells present in the first block of signal waveform data, process the second block of signal waveform data to extract a second discrete parameter set, wherein the second discrete parameter set identifies one or more second potential cells present in the second block of signal waveform data, and compare the first discrete parameter set and the second discrete parameter set to identify one or more matching cells, and an RF transceiver configured to transmit or receive radio signals based on the identification of the one or more matching cells.