Multi-Layer PCS Modulation with Layer-Specific DM Rates
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Solution Overview
Problem
Existing wireless communication systems face challenges in improving spectral efficiency and power consumption, especially when using multiple-layer transmissions, due to the sensitivity of probabilistic constellation shaping (PCS) to varying channel conditions across layers.
Innovation Solution
The implementation of a probabilistic constellation shaping (PCS) scheme that involves distribution matching and different DM rates for each layer, along with improved MCS indication and scaling values, to adapt to varying channel conditions and enhance link adaption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If probabilistic constellation shaping is used for multi-layer transmission, then spectral efficiency is improved, but the system becomes sensitive to varying channel conditions across layers
Solution Approach 1:
The patent segments the distribution matching process by applying different DM rates to different layers of the multi-layer transmission. Each layer can be independently configured with appropriate DM rates based on its specific channel conditions, allowing the system to maintain high spectral efficiency while adapting to varying channel characteristics across layers
Solution Approach 2:
The patent introduces dynamic adaptability by enabling the system to adjust DM rates dynamically for different layers based on real-time channel conditions. This dynamic configuration allows the PCS scheme to optimize performance for each layer individually, resolving the sensitivity issue while maintaining overall spectral efficiency
2Adaptability or versatility
If different DM rates are applied to different layers, then link adaption is enhanced, but device complexity increases
Solution Approach 1:
The patent applies local quality by configuring different DM rates for different layers based on their specific requirements and channel conditions. This localized optimization enhances link adaption for each layer without requiring complete reconfiguration of the entire system, thereby managing complexity while improving adaptability
3Use of energy by moving object
If PCS modulation scheme is implemented, then power consumption is improved, but the system requires complex distribution matching procedures
Solution Approach 1:
The patent utilizes parameter changes by adjusting DM rates as configurable parameters for different layers. This approach allows the system to optimize power consumption through PCS while managing complexity by controlling the distribution matching process through adjustable rate parameters rather than requiring complex structural modifications
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for a probabilistic constellation shaping (PCS) scheme for multiple layer transmissions. An example method includes obtaining a configuration for performing a PCS modulation scheme, identifying a set of bits corresponding to a transport block for communication via the multi-layer transmission, performing distribution matching on the set of bits using a set of parameters indicated in the configuration to obtain a set of distributed symbols, converting the set of distributed symbols into a set of distributed bits, encoding the set of distributed bits to obtain an encoded set of distributed bits, performing a modulation procedure on the encoded set of distributed bits in accordance with the PCS modulation scheme to obtain a set of modulation symbols corresponding to a codeword associated with the transport block, and transmitting, to a receiving device, the codeword, including the set of modulation symbols, via the multi-layer transmission.