Wireless Resource Allocation Using Index Modulation for Low Interference
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Solution Overview
Problem
Existing communication methods in multi-access environments face a trade-off between error rate characteristics and frequency utilization efficiency, with existing guard mechanisms to reduce interference leading to reduced resource utilization.
Innovation Solution
A communication method that allocates signals modulated by different modulation schemes to separate resources, using index modulation for active resources and another scheme for inactive resources to minimize multi-user interference while maintaining efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a guard is provided between signals of users to reduce interference, then error rate characteristic is improved, but frequency utilization efficiency is reduced
Solution Approach 1:
The patent applies different modulation schemes to different resource elements based on their specific characteristics. Index modulation is used for resource elements prone to multi-user interference, while other modulation schemes are used for resource elements with better conditions. This localized differentiation allows the system to improve error rate characteristics in critical areas without sacrificing overall frequency utilization efficiency.
Solution Approach 2:
The patent segments the frequency resources into multiple resource elements and applies different modulation strategies to each segment. By dividing the frequency band and selectively applying index modulation to specific resource elements, the system can target interference-prone areas while maintaining efficient resource usage in other segments, thus resolving the contradiction between error rate improvement and frequency utilization.
2Reliability
If index modulation is applied to spreading sequence and signals are multiplexed, then error rate characteristics are improved, but device complexity increases
Solution Approach 1:
The patent applies index modulation selectively to specific resource elements rather than uniformly across all signals. This localized application reduces the overall processing complexity compared to applying index modulation to all spreading sequences, while still achieving improved error rate characteristics in the most critical interference-prone resource elements.
Data Source
AI summary
A communication method includes performing wireless communication using a predetermined resource. The communication method includes allocating a signal modulated by a first modulation scheme to a first resource included in a predetermined resource, and allocating a signal modulated by a second modulation scheme different from the first modulation scheme to a second resource included in the predetermined resource. The first modulation scheme is a modulation scheme of modulating a signal by a combination of active resources and inactive resources.