Synchronization Code Sequence Masking for Efficient Signal Transmission
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Solution Overview
Problem
Current synchronization channel methods face challenges in efficiently adding additional information for communication systems, particularly in maintaining synchronization performance and complexity, especially in hierarchical and hybrid structures.
Innovation Solution
A method is proposed to add additional information to synchronization channels by generating a sequence that is repeated in the time domain, masking it with orthogonal or quasi-orthogonal codes, and allocating samples to specific frequency indices, allowing for efficient transmission of necessary communication information without increasing synchronization complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If additional information is added to synchronization channel sequences, then communication efficiency is improved, but sequence complexity increases
Solution Approach 1:
The patent embeds additional information within the synchronization channel sequence structure by repeating the base sequence multiple times and inserting information bits between repetitions. This nesting approach allows the synchronization function to remain intact while carrying additional communication data, resolving the contradiction between adding information and maintaining simplicity.
Solution Approach 2:
The patent transitions from a single-dimensional sequence to a multi-dimensional structure by introducing temporal repetitions and inserting information bits at specific positions between repetitions. This dimensional expansion enables additional information capacity without fundamentally altering the synchronization mechanism, thereby improving communication efficiency while controlling complexity.
2Reliability
If synchronization performance is maintained while adding information, then reliability is improved, but detection complexity increases
Solution Approach 1:
The patent divides the synchronization sequence into multiple segments by repeating the base sequence multiple times. Information bits are inserted between these segments, allowing the receiver to perform correlation detection on each segment independently. This segmentation maintains synchronization performance through robust correlation peaks while simplifying detection by breaking down the complex detection task into manageable parts.
3Quantity of substance
If orthogonal codes are used for masking, then information capacity is improved, but computational complexity increases
Solution Approach 1:
The patent employs orthogonal codes that serve multiple functions: they act as masking patterns for embedding information, provide structure for the repeated sequence, and enable efficient correlation-based detection at the receiver. This multi-functionality increases information capacity while avoiding the need for separate complex processing stages, thereby balancing computational complexity with information capacity.
Data Source
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AI summary
A method of generating a code sequence and method of adding additional information using the same are disclosed, by which a code sequence usable for a channel for synchronization is generated and by which a synchronization channel is established using the generated sequence. The present invention, in which the additional information is added to a cell common sequence for time synchronization and frequency synchronization, includes the steps of generating the sequence repeated in time domain as many as a specific count, masking the sequence using a code corresponding to the additional information to be added, and transmitting a signal including the masked sequence to a receiving end.