Data Sequence Insertion for Low-Leakage 5G NR Transmission
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Solution Overview
Problem
The existing 5G NR technology faces issues with spectrum leakage and interference between sub-bands due to the use of cyclic prefixes (CPs), which waste radio physical time-frequency resources and reduce spectrum efficiency, especially at higher frequency bands.
Innovation Solution
Inserting specific sequences (S1 and S2) before and after data sequences to form continuous second data sequences, reducing spectrum leakage and interference between sub-bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cyclic prefix (CP) is used to solve multipath delay, then reliability is improved, but spectrum efficiency deteriorates due to resource overhead
Solution Approach 1:
The patent extracts and removes the cyclic prefix from the data transmission structure, replacing it with a new sequence insertion scheme. By taking out the CP component that causes resource overhead, the patent eliminates the trade-off between reliability and spectrum efficiency, achieving both multipath delay resistance and high spectrum efficiency simultaneously.
Solution Approach 2:
The patent changes the fundamental parameter of the transmission structure by replacing the cyclic prefix with inserted sequences S1 and S2. This parameter change transforms the protection mechanism from a time-domain repetition structure to a sequence-based structure, thereby improving spectrum efficiency while maintaining reliability.
2Reliability
If time domain soft CP or filtering is used to reduce spectrum leakage, then reliability is improved, but spectrum efficiency deteriorates due to protection spacing requirements
Solution Approach 1:
The patent removes the protection spacing requirement by extracting the spectrum leakage suppression function from the time-domain protection structure. The inserted sequences S1 and S2 provide spectral containment without requiring guard intervals, thereby eliminating the trade-off between reliability and spectrum efficiency.
Solution Approach 2:
The patent introduces sequences S1 and S2 as intermediary elements that mediate between adjacent sub-bands. These sequences act as spectral barriers that prevent interference without requiring time-domain protection spacing, thus resolving the contradiction between reliability and spectrum efficiency.
3Device complexity
If DFT-s-OFDM is used to reduce PAPR, then device complexity is reduced, but spectrum efficiency deteriorates due to inherent spectrum leakage
Solution Approach 1:
The patent extracts the spectrum leakage problem from the DFT-s-OFDM structure by introducing inserted sequences S1 and S2. This separation allows the system to maintain the low complexity advantage of DFT-s-OFDM while eliminating its spectrum leakage disadvantage through the inserted sequences.
Solution Approach 2:
The patent creates a composite transmission structure by combining DFT-s-OFDM with inserted sequences S1 and S2. This composite approach integrates the low complexity benefit of DFT-s-OFDM with the spectral containment benefit of the inserted sequences, resolving the contradiction between device complexity and spectrum efficiency.
Data Source
AI summary
Disclosed are a data transmission method and apparatus, an electronic device, and a storage medium. The data transmission method includes the following steps: A sequence S1 is inserted before each first data sequence among L to-be-transmitted first data sequences and a sequence S2 is inserted after each first data sequence so as to form L second data sequences, where L is an integer greater than or equal to 2, the sequence S2 consists of N sequences S3 and one sequence S4 that are connected sequentially, and N is an integer greater than or equal to 1; and the L second data sequences are transmitted.