Index Modulation for 5G NR Uplink Coverage Enhancement
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Solution Overview
Problem
Existing 5G New Radio (NR) uplink coverage is limited by high frequency bands and antenna transmission power, with existing coverage enhancement methods facing challenges in resource efficiency and accuracy, particularly in dynamic environments.
Innovation Solution
The implementation of index modulation in communication methods, which involves modulating indication information based on the location of constellation symbol information within a transmission block, to generate modulated transmission information, thereby enhancing coverage by reducing Peak to Average Power Ratio (PAPR) and mitigating frequency offset sensitivity, while allowing sparse transmission in the frequency domain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high frequency bands are used for 5G NR, then transmission capacity is improved, but uplink coverage is limited
Solution Approach 1:
The patent applies dynamics by making the resource allocation flexible and adaptive. The indication information dynamically indicates which time-frequency resources are occupied by constellation symbols versus zero values, allowing the system to adaptively optimize transmission characteristics for different coverage conditions while maintaining high frequency band usage for capacity.
2Ease of operation
If conventional modulation methods are used, then transmission simplicity is maintained, but resource efficiency and accuracy deteriorate in dynamic environments
Solution Approach 1:
The patent changes the modulation parameter space by introducing index modulation on resource locations. Instead of only changing constellation symbols, the system modulates which time-frequency resources carry data versus zeros, creating a new dimension for information encoding that improves resource efficiency while maintaining implementation feasibility.
Solution Approach 2:
The patent adds another dimension to traditional modulation by utilizing the time-frequency resource selection as a modulation carrier. This index modulation approach encodes information not only in constellation symbols but also in the selection of which resources are active, effectively adding a spatial/resource dimension to the modulation process.
3Productivity
If dense transmission is used, then data rate is improved, but PAPR increases and frequency offset sensitivity worsens
Solution Approach 1:
The patent applies local quality by creating a non-uniform transmission pattern where only selected time-frequency resources carry constellation symbols while others contain zero values. This localized activation reduces the number of simultaneously active carriers, thereby lowering PAPR locally in the time-frequency domain while maintaining overall data rate through efficient resource selection.
Data Source
AI summary
Communication methods, a communication device, an electronic device, and a computer readable storage medium are provided. One communication method includes: performing, based on an index modulation mode, index modulation on indication information to be sent, by a location of a resource occupied by constellation symbol information in a transmission block, to generate modulated transmission information, where the modulated transmission information includes the constellation symbol information and the indication information.