JCS Waveform Resource Allocation With Split Modulation Schemes
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Solution Overview
Problem
Existing wireless communication systems face challenges in achieving balanced performance for both data communication and sensing due to conflicting parameters in joint communication and sensing (JCS) waveforms, where higher-order modulation schemes enhance data rates but degrade sensing accuracy, and lower-order schemes improve sensing but reduce throughput.
Innovation Solution
Implementing different modulation schemes for separate portions of a transport block using a JCS waveform, with one portion modulated for sensing and the other for data communication, and configuring resource elements (REs) accordingly to optimize both functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If higher-order modulation schemes are used in JCS waveforms, then data communication throughput is improved, but sensing accuracy deteriorates
Solution Approach 1:
The transport block is segmented into two distinct portions: a first portion modulated with a first modulation scheme optimized for sensing accuracy, and a second portion modulated with a second modulation scheme optimized for data communication throughput. This segmentation allows each portion to be independently optimized for its respective function without compromising the other.
Solution Approach 2:
Different modulation schemes are applied to different portions of the transport block based on their intended use. The first portion uses a modulation scheme with properties suitable for sensing (e.g., lower order, more robust to noise), while the second portion uses a modulation scheme optimized for high-rate data communication. This local differentiation of quality resolves the contradiction by allowing each function to have its own optimal characteristics.
2Measurement precision
If lower-order modulation schemes are used in JCS waveforms, then sensing accuracy is improved, but data communication throughput deteriorates
Solution Approach 1:
The transport block is divided into two portions that can be independently modulated. The first portion uses lower-order modulation schemes that provide better sensing accuracy, while the second portion uses higher-order modulation schemes that provide higher data communication throughput. This segmentation eliminates the need to choose a single modulation scheme that compromises either function.
Solution Approach 2:
The system applies different modulation qualities to different parts of the transmitted signal. The first portion of the transport block receives a modulation scheme tailored for sensing accuracy, while the second portion receives a modulation scheme tailored for throughput. This local quality differentiation allows simultaneous optimization of both sensing and communication performance.
3Device complexity
If a single modulation scheme is used for the entire transport block, then system complexity is reduced, but both sensing accuracy and data communication throughput cannot be simultaneously optimized
Solution Approach 1:
Rather than using a single modulation scheme for the entire transport block, the system segments the transport block and applies different modulation schemes to different segments. This increases optimization capability while managing complexity through structured segmentation and independent modulation scheme selection for each portion.
Data Source
AI summary
A wireless device may modulate a first portion of data of a transport block associated with a joint communication and sensing (JCS) waveform according to a first modulation scheme of a set of modulation schemes for sensing. The wireless device may modulate a second portion of data of the transport block according to a second modulation scheme. The wireless device may map the modulated first portion of data to a first set of resource elements associated with sensing and may map the second portion of data to a second set of resource elements associated with data communications. The wireless device may transmit the transport block including the mapped first and second portions of data via the JCS waveform. In some cases, the wireless device may transmit the transport block according to one or more parameters of a configuration for the JCS waveform.