DFT-s-OFDM Sequence Extension for Lower PAPR and 6G Compatibility
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Solution Overview
Problem
Existing DFT-s-OFDM schemes struggle to meet the peak to average power ratio (PAPR) and out-of-band energy leakage (OOBE) requirements of 5G and 6G communication systems, and are not compatible with other enhancement technologies like NCP/UW and FDSS.
Innovation Solution
An electronic device performs zero-padding and discrete Fourier transformation spreading operations on input sequences, followed by data deletion to create an extended sequence, allowing for flexible spectrum extension and reduced PAPR.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If DFT-s-OFDM scheme is used for 6G communication, then low PAPR is achieved, but it cannot meet the higher PAPR requirements of 5G evolution and 6G systems
Solution Approach 1:
The patent segments the sequence processing into distinct stages: zero-padding operation, DFT spreading operation, and data deletion operation. This segmentation allows each operation to be optimized independently while maintaining overall system performance and compatibility with both 5G evolution and 6G requirements.
Solution Approach 2:
The patent extends the sequence from Q elements to M elements (where M > Q) by performing zero-padding and DFT spreading operations, effectively adding dimensionality to the signal processing. This extension allows the system to meet higher PAPR requirements while maintaining compatibility with existing frameworks.
2Adaptability or versatility
If improved schemes based on NCP and UW are applied, then preprocessing before DFT module is performed, but compatibility with other enhancement technologies like FDSS is reduced
Solution Approach 1:
The patent creates a universal processing framework that can accommodate multiple enhancement technologies. By performing zero-padding and DFT spreading operations that extend the sequence to M elements, the system maintains compatibility with NCP/UW schemes while also being able to integrate with FDSS and other enhancement technologies, avoiding the compatibility issues of existing approaches.
3Speed
If NOW scheme with FTN modulation is introduced, then sampling interval compression in time domain is achieved, but compatibility with existing technologies like NCP/UW or FDSS becomes difficult
Solution Approach 1:
The patent performs zero-padding and DFT spreading operations as preliminary actions before data deletion. This preliminary extension of the sequence to M elements creates a flexible foundation that enables future sampling interval compression through FTN modulation while maintaining compatibility with existing technologies, rather than attempting compression first which would compromise compatibility.
4Productivity
If sequence extension from Q to M elements is performed, then spectral efficiency is maintained, but device complexity increases due to additional operations
Solution Approach 1:
The patent merges the zero-padding operation and DFT spreading operation into a unified processing sequence that extends the input sequence from Q to M elements. This merging approach maintains spectral efficiency by creating an extended sequence that can carry more information, while the integrated nature of the operations helps manage device complexity compared to implementing separate enhancement technologies.
Data Source
AI summary
The present disclosure provides an electronic device, including an input unit configured to obtain a first sequence including Q elements, the Q being an integer greater than 0; a control unit configured to perform a zero-padding operation and a discrete Fourier transformation spreading operation on the first sequence to determine an extension sequence, and perform a data deletion operation based on the extension sequence to determine a second sequence, wherein the second sequence includes M elements, the M being an integer greater than 0, and the M being greater than the Q.