Communication Method Using Golay-Hadamard Sequences for Channel Estimation
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Solution Overview
Problem
Current WLAN standards face challenges in reducing channel estimation time and improving efficiency, which is crucial for maintaining communication quality amidst interference.
Innovation Solution
The proposed communication method generates a first sequence based on a complete complementary code set, determined through a Kronecker product operation involving a Golay pair and a Hadamard matrix, and uses this sequence for channel estimation, target sensing, or time synchronization, thereby avoiding the use of a P-matrix.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a P-matrix is used in constructing zero correlation sequences, then the channel estimation sequence can be constructed, but the complexity of construction increases and the sequence length becomes longer
Solution Approach 1:
The patent extracts and removes the P-matrix component from the channel estimation sequence construction process. By taking out the P-matrix multiplication step, the patent simplifies the construction process while maintaining the essential zero correlation zone properties through direct use of complementary code sets and their cyclic shifts.
Solution Approach 2:
The patent segments the channel estimation sequence into multiple independent streams, where each stream is constructed from complementary code sets without requiring P-matrix operations. This segmentation allows parallel construction of multiple sequences with reduced individual complexity.
2Productivity
If traditional channel estimation methods are used, then channel estimation can be performed, but the estimation time is longer and efficiency is lower
Solution Approach 1:
The patent changes the structural parameters of the channel estimation sequence by using complementary code sets with inherent zero correlation zone properties. This parameter change eliminates the need for complex P-matrix operations and reduces the effective sequence length, thereby decreasing estimation time and improving efficiency.
Solution Approach 2:
The patent performs preliminary construction of sequences with zero correlation zone properties using complementary code sets before actual channel estimation. This preliminary action ensures that the sequences are pre-optimized for fast correlation-based estimation, reducing the time required during the actual estimation process.
Data Source
AI summary
A communication method includes generating a first sequence, where the first sequence is based on a complete complementary code set, the complete complementary code set is based on a Golay pair and a Hadamard matrix through a Kronecker product operation, and the first sequence is used for channel estimation; and sending the first sequence. In the method, use of a P-matrix is avoided in a process of constructing a plurality of streams of zero correlation sequences.