Wireless Uplink Waveform Segmentation for Lower PAPR
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Solution Overview
Problem
Current wireless communication systems face challenges with high peak-to-average power ratios (PAPR) in uplink waveforms, leading to inefficient RF resource utilization and unpredictable symbol interference.
Innovation Solution
The method involves generating multiple segments of a waveform and performing an overlap-and-add operation in the phase domain at segment boundaries, which helps maintain constant amplitude and reduces PAPR, along with trellis coding and BPSK constellation point manipulation to smooth transitions and minimize peak power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional uplink waveforms are used, then communication functionality is provided, but high peak-to-average power ratio is generated causing inefficient RF resource utilization and unpredictable symbol interference
Solution Approach 1:
The waveform is divided into multiple segments, each processed independently through overlap-and-add operations in the phase domain. This segmentation allows control of peak power characteristics while maintaining overall waveform integrity and communication functionality.
Solution Approach 2:
The patent applies overlap-and-add operations specifically in the phase domain rather than traditional time or frequency domains. This parameter change in the processing domain transforms the waveform characteristics to achieve lower PAPR while preserving signal integrity.
2Device complexity
If waveform segments are processed independently, then processing complexity is reduced, but discontinuities at segment boundaries cause symbol interference
Solution Approach 1:
The overlap-and-add operations are performed in advance at segment boundaries during waveform generation. This preliminary action ensures smooth transitions between segments before transmission, preventing discontinuities and subsequent symbol interference while maintaining manageable processing complexity.
Data Source
AI summary
Various aspects described herein relate to generating a waveform for transmitting in wireless communications. A plurality of segments of a waveform are generated. An overlap-and-add is performed in at least a phase domain at one or more boundaries between the plurality of segments. The waveform can be transmitted.