Low PAPR Sequence Generation via Length-6 8PSK Symbols
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Solution Overview
Problem
Current mobile communication systems face challenges in supporting high-speed data services, large data traffic, increased connection devices, low latency, and energy efficiency, necessitating the development of advanced techniques such as small cell enhancement, dual connectivity, and non-orthogonal multiple access to meet the requirements of next-generation mobile communication systems.
Innovation Solution
A method for generating a low peak to average power ratio (PAPR) sequence in a wireless communication system using an 8 phase shift keying (PSK) symbol-based length-6 sequence, determined by specific values of φ(i), which is cyclic shifted and used for DFT-s-OFDM or CP-OFDM systems, and applied with Frequency Domain Spectrum Shaping (FDSS) for improved PAPR performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional sequences are used in wireless communication systems, then the system can support basic data transmission, but the PAPR (peak to average power ratio) performance deteriorates, leading to inefficiency in power consumption and signal quality
Solution Approach 1:
The patent changes the parameters of the reference signal sequence by using specific length-6 sequences with carefully selected phase values φ(i) from a reduced set of 86 possible combinations. This parameter optimization directly reduces PAPR while maintaining sequence functionality for channel estimation and demodulation.
Solution Approach 2:
The patent applies Frequency Domain Spectrum Shaping (FDSS) as a partial action to further reduce PAPR of the already optimized length-6 sequences. This additional processing step provides extra PAPR reduction without completely redesigning the sequence structure, achieving incremental improvement.
2Measurement precision
If standard reference signal sequences are used, then the system maintains simplicity in sequence generation, but the auto-correlation properties and cyclic shift characteristics are insufficient for optimal signal separation and detection
Solution Approach 1:
The patent optimizes auto-correlation properties by selecting specific phase values φ(i) from the 86 possible combinations for length-6 sequences. This parameter selection ensures that cyclic shifts of these sequences maintain good orthogonality and auto-correlation characteristics, improving signal detection precision without requiring complex generation algorithms.
Data Source
AI summary
The present specification provides a method for generating a low peak to average power ratio (PAPR) sequence in a wireless communication system. Specifically, the present specification relates to a method for generating a low PAPR sequence in a wireless communication system, the method comprising the steps of: generating a sequence of length-6 having a symbol as each element of the sequence; and generating the low PAPR sequence on the basis of the sequence of length-6.