Unlicensed-Band Interlace Allocation for Lower-PAPR 5G NR Signals
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Solution Overview
Problem
Existing methods for transmitting and receiving signals in the unlicensed band of the 5G NR system are not sufficiently studied, leading to inefficiencies and increased computational load due to prime factors in resource allocation, which can affect Peak to Average Power Ratio (PAPR) and compliance with Power Spectral Density (PSD) regulations.
Innovation Solution
The system employs an interlace allocation technique where resources are distributed in the frequency domain, avoiding prime factors such as 2, 3, and 5 in the number of subcarriers, and adjusts the number and positions of subcarriers to maintain uniform frequency spacing and comply with PSD regulations, using DFT and IDFT processes to optimize signal transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If resources are allocated in the unlicensed band using conventional methods, then resource allocation can be performed, but computational load increases and PAPR is not optimized due to prime factors in resource allocation
Solution Approach 1:
The patent changes the parameter of resource allocation by specifically avoiding prime factors (2, 3, 5) in the number of subcarriers. This parameter modification optimizes the DFT/IDFT computational load and reduces PAPR, directly resolving the contradiction between transmission efficiency and computational complexity
2Adaptability or versatility
If the number of subcarriers includes prime factors such as 2, 3, and 5, then resource allocation flexibility is improved, but computational load increases due to DFT and IDFT processes
Solution Approach 1:
The patent modifies the parameter of subcarrier count by excluding numbers with prime factors 2, 3, and 5. This change reduces the computational complexity of DFT/IDFT processes while maintaining adequate resource allocation flexibility through careful selection of alternative subcarrier numbers
3Ease of operation
If resources are allocated without considering prime factors, then resource allocation is simplified, but PAPR increases and PSD compliance becomes difficult
Solution Approach 1:
The patent changes the resource allocation parameter by excluding prime factors from subcarrier counts. This simultaneously simplifies the allocation process and ensures PAPR optimization and PSD compliance, as the excluded prime factors are precisely those that cause computational and regulatory issues
Data Source
AI summary
In an operation in a license-exempt band (unlicensed band), the present invention contributes to the provision of a mobile station, a base station, a transmission method and a receiving method which suitably transmit and receive a signal. The mobile station 200 includes: a transmission unit 205 which transmits an uplink signal; and a control unit 201 which, when a first number indicating a first resource amount that can be used in the transmission of the uplink signal includes a third number, which is different from a specific second number, as a prime factor, controls the transmission of a signal of a fourth number that does not include the third number as the prime factor by using a second resource.