PUCCH Sequence Phase Shift for PAPR Reduction
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in transmitting uplink channels, particularly in shared spectrum environments where peak to average power ratio (PAPR) and cube metric (CM) values are high, affecting transmission performance.
Innovation Solution
The method involves mapping a physical uplink control channel (PUCCH) sequence to multiple resource blocks (RBs) in an interlace, with varying phase shift (PS) and cyclic shift (CS) values based on RB indices to optimize PAPR and CM performance, thereby enhancing transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a PUCCH sequence is transmitted in conventional uplink channels, then the transmission can be performed, but the peak to average power ratio (PAPR) and cube metric (CM) values become high, degrading transmission performance
Solution Approach 1:
The patent applies different phase shift values to different resource blocks within the same PUCCH transmission. Specifically, the phase shift is configured based on the resource block index, so that each RB experiences a tailored phase shift that contributes to reducing the overall PAPR and CM. This local differentiation of signal characteristics resolves the contradiction by optimizing performance at each frequency location rather than using a uniform approach.
2Reliability
If the phase shift value is varied based on resource block index, then PAPR and CM values are reduced, but the system complexity increases
Solution Approach 1:
The patent changes the phase shift parameter dynamically based on the resource block index. Instead of using a fixed phase shift value, the system adjusts the phase shift parameter according to the specific RB being transmitted. This parameter adaptation allows the system to optimize PAPR and CM performance while maintaining manageable complexity through rule-based parameter variation rather than complex signal processing.
Data Source
AI summary
A method and apparatus for transmitting and receiving a signal in a wireless communication system, according to an embodiment of the present invention, comprise: iteratively mapping a PUCCH sequence to each of resource blocks (RBs) within an interlace; and transmitting a PUCCH on the interlace, wherein a phase shift (PS) value of the PUCCH sequence may be changed on the basis of an RB index of each of the RBs.