Dual Mode Constellation Mapping for Power Reduction
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Solution Overview
Problem
Current data communication systems face inefficiencies in energy usage and signal power management, particularly in multi-carrier systems like OFDM and DMT, where all constellation points are used for data transmission, leading to high energy consumption and potential signal degradation.
Innovation Solution
Implementing a dual transmission mode system where data bits are mapped to a subset of constellation points in the second mode, reducing average signal power and enabling seamless switching between full and reduced power settings without reconfiguring the constellation, thereby achieving energy savings and robust data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If all constellation points are used for data transmission in multi-carrier systems, then data transmission capacity is maximized, but energy consumption increases and signal degradation occurs
Solution Approach 1:
The system dynamically switches between two transmission modes: a first mode using all constellation points for maximum data capacity, and a second mode using only a subset of constellation points for reduced energy consumption. This dynamic adaptation allows the system to optimize between productivity and energy usage based on current operational requirements.
Solution Approach 2:
The invention changes the parameter of constellation point selection by mapping data bits to different subsets of constellation points. In the second transmission mode, data bits are mapped to a restricted subset of constellation points, which reduces the average signal power and consequently reduces energy consumption while maintaining data transmission functionality.
2Productivity
If all constellation points are used for data transmission, then data rate is maximized, but average signal power increases causing potential signal degradation
Solution Approach 1:
The system changes the parameter of constellation point mapping by restricting data bit mapping to a subset of constellation points in the second transmission mode. This restriction reduces the average signal power, preventing signal degradation while still allowing data transmission at a controlled rate.
Solution Approach 2:
The system dynamically adjusts the signal power parameter by switching between transmission modes. In the second mode, using a subset of constellation points naturally reduces average signal power, providing adaptive power control without requiring additional power management circuitry.
3Use of energy by moving object
If transmission mode switching is implemented, then energy efficiency is improved, but system complexity increases
Solution Approach 1:
The system implements dynamic mode switching between two predefined transmission modes, allowing energy efficiency optimization through simple state transitions. The switching mechanism controls which constellation point subset is used, providing energy efficiency improvements without requiring complex real-time adjustments.
4Power
If a subset of constellation points is used, then average power is reduced, but data transmission capacity decreases
Solution Approach 1:
The system dynamically selects between using all constellation points (first mode) for maximum data capacity and using a subset of constellation points (second mode) for reduced power consumption. This dynamic selection allows the system to adaptively balance power reduction with data transmission capacity requirements based on operational conditions.
Data Source
AI summary
Embodiments related to communication of data in a first and second transmission mode are depicted and described herein.