Complex Signal Point Sequence Modulation for Wireless Resource Efficiency
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Solution Overview
Problem
The existing Index Modulation (IM) technology does not adequately enhance resource efficiency in wireless communication systems, as available resource elements are not sufficiently utilized, leading to suboptimal performance in high data rate or high throughput applications.
Innovation Solution
A new modulation mechanism is introduced that converts first-type and second-type bit sequences into complex signal point sequences, where each complex signal point represents an element of multiple complex signal point sets, allowing for enhanced resource efficiency by utilizing previously unused resource elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional IM modulation is used, then resource efficiency is improved, but available resource elements are not sufficiently utilized
Solution Approach 1:
The patent transitions from conventional IM that uses only resource element positions to a new modulation scheme that utilizes both resource element positions and complex signal point set patterns. This adds a new dimension (pattern dimension) to the information encoding, allowing more bits to be transmitted per resource element block while fully utilizing all available resource elements.
Solution Approach 2:
The patent combines multiple complex signal point sets (first complex signal point set and second complex signal point set) to form a composite modulation structure. By mapping different patterns of these sets to different bit sequences, the system achieves higher resource efficiency while ensuring complete utilization of resource elements.
2Loss of information
If complex signal points are placed only at particular positions, then information can be expressed using positions, but resource efficiency enhancement is insufficient
Solution Approach 1:
The patent divides the bit sequence into multiple segments (first bit sequence and second bit sequence), where the first segment controls the selection of complex signal point set patterns and the second segment determines the specific complex signal points. This segmentation allows independent optimization of pattern selection and signal point mapping, achieving both information expression and resource efficiency enhancement.
Solution Approach 2:
The patent creates a universal modulation framework where resource elements serve dual purposes: they carry complex signal points for information transmission and their collective pattern configuration also conveys additional information. This multi-functionality maximizes the utility of each resource element, transforming the limitation into an advantage for achieving higher resource efficiency.
Data Source
AI summary
A transmission device includes a transmitter having circuitry that converts a first-type bit sequence and a second-type bit sequence into a complex signal point sequence. Each of a plurality of complex signal points included in the complex signal point sequence represents an element of one of a plurality of complex signal point sets. In the complex signal point sequence, the applicable patterns of the plurality of complex signal point sets correspond to the first-type bit sequence in a plurality of predetermined combinations of candidates for the first-type bit sequence and the applicable patterns. Each complex signal point included in the complex signal point sequence corresponds to the second-type bit sequence.