SC-FDE Synchronization Framework for Low-Power Initial Access
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in designing a synchronization framework for single carrier frequency domain equalization (SC-FDE) that consider power consumption, synchronization performance, and resource overhead during initial access procedures.
Innovation Solution
A synchronization framework is developed for SC-FDE systems using narrowband primary synchronization signals (PSS) on a sparse raster and wideband secondary synchronization signals (SSS) on a dense channel, allowing for efficient detection and reduction of SSS hypotheses while supporting a high number of Cell IDs, with WTRUs determining candidate time and frequency locations of SSS and PBCH resources based on PSS detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If narrowband PSS on sparse raster is used, then power consumption is reduced and synchronization performance is improved, but device complexity increases due to multiple candidate parameter sets
Solution Approach 1:
The synchronization signal detection process is segmented into multiple stages: first detecting PSS with narrowband on sparse raster, then using detected PSS parameters to determine candidate SSS parameter sets, and finally detecting SSS from reduced candidate sets. This segmentation allows the device to focus computational resources sequentially rather than processing all possibilities simultaneously, reducing power consumption while managing complexity.
Solution Approach 2:
The PSS detection is performed as a preliminary action before SSS detection. By first detecting the PSS and determining its parameters (symbol rate, center frequency, time offset), the system establishes a foundation that reduces the search space for SSS detection. This preliminary action eliminates the need to evaluate all possible SSS parameter combinations, thereby reducing both power consumption and device complexity.
2Reliability
If wideband SSS on dense channel is used, then synchronization performance is improved and Cell ID support is enhanced, but resource overhead increases
Solution Approach 1:
The system applies different bandwidth qualities to different synchronization signals: narrowband for PSS (reducing resource overhead) and wideband for SSS (enhancing synchronization performance and Cell ID support). This local quality differentiation allows the wideband SSS to provide robust synchronization and support for high number of Cell IDs while the narrowband PSS minimizes the overall resource overhead of the synchronization framework.
3Adaptability or versatility
If multiple candidate SSS parameter sets are evaluated, then adaptability is improved, but productivity decreases due to increased detection time
Solution Approach 1:
The system uses feedback from PSS detection to guide SSS detection. The detected PSS parameters (symbol rate, center frequency, time offset) provide feedback that constrains the candidate SSS parameter sets, reducing the number of hypotheses that need to be evaluated. This feedback mechanism maintains adaptability by considering multiple candidates while improving productivity by eliminating unlikely options based on PSS observation.
Solution Approach 2:
The candidate SSS parameter sets are dynamically determined based on the detected PSS characteristics. Rather than evaluating a fixed large set of all possible parameters, the system dynamically generates candidate sets that are consistent with the observed PSS parameters. This dynamic approach maintains adaptability to different transmission conditions while improving detection efficiency and productivity.
Data Source
AI summary
Procedures, methods, architectures, apparatuses, systems, devices, and computer program products for a single carrier frequency domain equalization (SC-FDE) synchronization framework. For example, a SC-FDE wireless communication system may support narrowband primary synchronization signals (PSSs) on a sparse raster and wideband secondary synchronization signals (SSSs) on a relatively denser raster. PSS may be transmitted in a PSS burst, and candidate SSS parameters for SSS detection may be based on a detected PSS. An SSS may be detected using the candidate SSS parameters. For example, efficient SSS detection may be provided while supporting sufficiently high numbers of cell identifiers. The presence or absence of a physical broadcast channel (PBCH) transmission may be determined based on properties of SSSs. The PSSs and SSSs may be used for cell search and initial access procedures.