Golay Complementary Sequence Transmission With Adjustable Timing for Detection
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Solution Overview
Problem
Current sequence transmission methods in systems like downlink synchronization, random access, and radar lack flexibility and cannot be adjusted to optimize detection performance.
Innovation Solution
A method involving the use of Golay complementary pairs of sequences with adjustable time intervals, allowing for flexible adjustment of time domain positions and intervals to optimize the ambiguity function for improved detection performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sequences are transmitted with fixed time intervals, then the transmission structure is simple, but the detection performance cannot be optimized
Solution Approach 1:
The patent applies dynamics by transitioning from fixed time intervals to variable time intervals between sequence transmissions. The time interval is dynamically adjusted based on the ambiguity function characteristics, allowing optimization of detection performance for different target scenarios while maintaining a relatively simple transmission structure.
Solution Approach 2:
The patent changes the time interval parameter between sequence transmissions to optimize detection performance. By adjusting this key parameter based on the ambiguity function and detection requirements, the system achieves improved measurement precision without fundamentally changing the transmission structure.
2Measurement precision
If multiple sequences are transmitted to improve detection accuracy, then detection performance improves, but the transmission time increases
Solution Approach 1:
The patent uses periodic action by transmitting multiple sequences at different time intervals. The sequences are transmitted periodically with variable intervals between them, allowing the system to accumulate detection information from multiple sequences while controlling the total transmission time through intelligent interval selection.
Solution Approach 2:
The patent applies preliminary action by pre-determining the optimal time intervals between sequence transmissions based on the ambiguity function characteristics before actual transmission. This allows the system to efficiently allocate transmission time and achieve high detection accuracy without unnecessary time consumption.
3Measurement precision
If the time interval between sequences is reduced to improve resolution, then detection resolution improves, but the ambiguity function becomes less effective
Solution Approach 1:
The patent changes the time interval parameter dynamically to balance resolution and ambiguity function effectiveness. By selecting appropriate time intervals based on the specific detection scenario and ambiguity function characteristics, the system achieves optimal resolution while maintaining the effectiveness of the ambiguity function for accurate target detection.
Solution Approach 2:
The patent applies dynamics by making the time interval between sequences variable rather than fixed. This allows the system to adapt the interval to different detection requirements, achieving high resolution when needed while maintaining ambiguity function effectiveness for reliable target identification in other scenarios.
Data Source
AI summary
A sending-end apparatus determines N1 first sequences, where an n′th first sequence is determined based on an n′th first base sequence, n′=0, 1, . . . , N1−1, and each first base sequence is a sequence in a GCP. The sending-end apparatus sequentially sends the N1 first sequences, where an equal time interval exists between time domain positions of any two adjacent first sequences, and N1 first base sequences are related to a prime factor of N1, or N1 first base sequences are predefined sequences.