MT-FQAM Symbol Mapping for Non-Gaussian Interference
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Solution Overview
Problem
Current wireless communication systems face limitations in decoding performance due to assuming a Gaussian distribution for interference signals, which can lead to suboptimal channel capacity and decoding efficiency, as non-Gaussian distributions offer higher channel capacity and decoding performance.
Innovation Solution
The implementation of a symbol mapping method and apparatus using MultiTone-Frequency-Quadrature Amplitude Modulation (MT-FQAM) that considers non-Gaussian information, allowing for dynamic selection between FQAM and MT-FQAM schemes based on resource block mapping, enabling improved diversity effects and channel quality assessment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If QAM modulation scheme is used to make interference signal similar to Gaussian distribution, then decoding complexity is reduced, but channel capacity and decoding performance deteriorate
Solution Approach 1:
The patent applies dynamics by making the modulation scheme adaptive rather than fixed. The system dynamically selects between QAM and FQAM modulation schemes based on channel conditions and configuration parameters. This allows the system to transition from static Gaussian-optimized QAM to dynamic schemes that can exploit non-Gaussian channel characteristics when beneficial, thereby improving channel capacity while maintaining manageable decoding complexity through selective scheme application.
Solution Approach 2:
The patent changes the fundamental parameter of modulation scheme selection. Instead of always using QAM with Gaussian assumptions, the system introduces FQAM as an alternative parameter state that explicitly accounts for non-Gaussian interference distributions. This parameter change enables the system to match the modulation scheme to the actual channel statistics, improving decoding performance by aligning the interference model with reality rather than forcing the channel to match Gaussian assumptions.
2Reliability
If FQAM scheme is used to exploit non-Gaussian distribution, then channel capacity improves, but system complexity increases
Solution Approach 1:
The patent applies dynamics by making the modulation scheme adaptive rather than fixed. The system dynamically selects between QAM and FQAM modulation schemes based on channel conditions and configuration parameters. This allows the system to transition from static Gaussian-optimized QAM to dynamic schemes that can exploit non-Gaussian channel characteristics when beneficial, thereby improving channel capacity while maintaining manageable decoding complexity through selective scheme application.
3Reliability
If MT-FQAM with distributed resource block mapping is used, then diversity effect and decoding performance improve, but resource allocation complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the resource allocation into distinct mapping modes (continuous vs. distributed) and by segmenting the decision process into configurable parameters. The system segments the frequency resources into multiple tones that can be allocated in different patterns, and segments the modulation scheme selection into discrete options (QAM, FQAM, MT-FQAM). This segmentation makes the complex resource allocation manageable through structured, parameterized decisions rather than monolithic complexity.
Solution Approach 2:
The patent applies dynamics by making the resource block mapping mode configurable and adaptive. The system can dynamically switch between continuous and distributed mapping based on channel conditions, traffic requirements, and configuration parameters. This dynamic resource allocation allows the system to exploit diversity effects when beneficial while maintaining simpler continuous mapping when appropriate, thereby managing resource allocation complexity through adaptive rather than fixed allocation rules.
Data Source
AI summary
A method of operating a base station in a wireless communication system supporting Frequency-Quadrature Amplitude Modulation (FQAM) and Multi-Tone FQAM (MT-FQAM) is provided. The method includes determining a modulation scheme of data to be transmitted, and modulating the data according to the determined modulation scheme, wherein if at least one resource block is included in the data and if the at least one resource block is mapped to at least one tone in a distributed manner, the MT-FQAM scheme is selected, or if one resource block is included in the data and if the one resource block is mapped to at least one tone in a continuous manner, the FQAM scheme is selected, or if multiple resource blocks are included in the data and if the multiple resource blocks are mapped to at least one tone in a continuous manner, the MT-FQAM scheme is selected.