FBMC Synchronization Signal Resource Allocation
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Solution Overview
Problem
The existing FBMC systems face challenges in reducing synchronization signal cost and improving spectral efficiency due to the need for multiple identical synchronization signals and complex algorithms, exacerbated by interference from data symbols.
Innovation Solution
A method and apparatus for sending a synchronization signal in an FBMC system by determining the time-frequency resource location of the synchronization symbol and the location with mutual interference, allowing the synchronization symbol to be sent on one resource location and a protection symbol on the interfering location, thereby reducing the synchronization signal cost and improving spectral efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple identical synchronization signals are sent with protection symbols before and after, then frequency synchronization accuracy is improved, but synchronization signal cost increases and spectral efficiency decreases
Solution Approach 1:
The patent extracts the essential function of synchronization from multiple redundant signals. By analyzing the interference characteristics of FBMC systems, the invention identifies that a single synchronization signal with properly designed protection symbols can achieve the same frequency synchronization accuracy as multiple signals, thereby removing the redundancy and improving spectral efficiency.
Solution Approach 2:
The patent changes the parameters of protection symbols from generic dummy symbols to specifically designed symbols with controlled interference characteristics. By adjusting the amplitude and phase parameters of protection symbols and optimizing their positioning around the synchronization signal, the system achieves accurate frequency synchronization with minimal resource overhead.
2Measurement precision
If multiple identical synchronization signals are sent with protection symbols before and after, then frequency synchronization accuracy is improved, but device complexity increases
Solution Approach 1:
The patent extracts and eliminates the need for complex algorithms by redesigning the synchronization signal structure. Instead of using multiple signals with complex processing, the invention uses a single signal with optimized protection symbols that simplify the receiving terminal's processing requirements while maintaining synchronization accuracy.
Solution Approach 2:
The patent changes the structural parameters of the synchronization signal and protection symbols to simplify the receiving algorithm. By optimizing the positioning and characteristics of protection symbols, the invention enables more straightforward frequency offset estimation at the receiver, reducing computational complexity.
3Reliability
If protection symbols are arranged before and after synchronization signals, then interference from data symbols is avoided, but resource utilization decreases
Solution Approach 1:
The patent applies local quality by designing protection symbols with specific interference-cancellation properties only in the regions where they are needed. Rather than using uniform protection across all synchronization signals, the invention tailors the protection symbol characteristics to the local interference environment, optimizing resource usage while maintaining reliability.
Solution Approach 2:
The patent optimizes the parameters of protection symbols (amplitude, phase, positioning) to achieve effective interference protection with minimal resource consumption. By carefully adjusting these parameters, the system reduces the number and size of protection symbols needed while maintaining synchronization signal integrity.
Data Source
AI summary
Embodiments of the present disclosure relate to a method and an apparatus for sending a synchronization signal in an FBMC system in the field of communications, and are used for reducing the cost of a synchronization signal and improving the spectral efficiency. The method provided by the embodiments of the present disclosure includes: determining a sending time-frequency resource location of a synchronization symbol; determining a time-frequency resource location having mutual interference with the synchronization symbol; sending the synchronization symbol on the sending time-frequency resource location of the synchronization symbol, and sending a protection symbol on the time-frequency resource location having mutual interference with the synchronization symbol.