Spectral Extension Signal Processing for 5G Coverage
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G networks, face challenges in enhancing network coverage due to limitations in spectral efficiency and peak-to-average power ratio (PAPR), which affect transmission power and coverage.
Innovation Solution
The method involves spectral extension by determining excess bands on either side of an inband allocation, generating spectral extension data and reference signals on these bands, and performing frequency domain spectral shaping, including tone reservation to reduce PAPR and improve frequency diversity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If spectral extension is performed by determining excess bands and generating spectral extension data signals, then spectral efficiency is improved, but device complexity increases due to additional signal generation and processing steps
Solution Approach 1:
The excess bands are divided into inner excess bands and outer excess bands, allowing different signal types to be generated in different segments. This segmentation enables systematic handling of the spectral extension process while improving spectral efficiency through structured resource allocation.
Solution Approach 2:
Different types of signals are generated in different portions of the excess bands (inner vs outer), optimizing the spectral extension process by applying different signal characteristics to different frequency regions. This local differentiation improves overall spectral efficiency while managing complexity through localized processing.
2Power
If frequency domain spectral shaping is performed to reduce PAPR, then transmission power is improved, but device complexity increases due to additional processing requirements
Solution Approach 1:
Frequency domain spectral shaping is performed in advance before signal transmission, and tone reservation is implemented to pre-reduce PAPR. This preliminary processing enables improved transmission power characteristics while the structured approach manages computational complexity through advance planning and systematic processing.
Data Source
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AI summary
There is provided an apparatus comprising: at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to perform: receiving a configuration comprising a resource allocation; determining a spectral extension for an inband allocation by determining a first excess band on one side of the inband allocation and a second excess band on another side of the inband allocation; determining an inner portion of the first excess band to obtain a first inner excess band; determining an inner portion of the second excess band to obtain a second inner excess band; determining an outer portion of the first excess band to obtain a first outer excess band; determining an outer portion of the second excess band to obtain a second outer excess band; generating, based on an inband signal, a spectral extension data signal at least on resources on the first inner excess band and on the second inner excess band; generating, based on the inband signal and the first excess band and the second excess band, a reference signal at least on resources on the first inner excess band and on the second inner excess band; generating an outer excess band signal on resources on the first outer excess band and on the second outer excess band, wherein the outer excess band signal comprises a different type of signal than the spectral extension data signal and the reference signal.