Multi-Level Coding Bit Allocation Across Wireless Channels
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Solution Overview
Problem
In wireless communications systems, dynamically adapting bit allocations for multi-level coding schemes based on instantaneous channel conditions is challenging due to the need for pre-configuration, standardization, or storage of such allocations, which increases signaling overhead and latency.
Innovation Solution
A method where an encoding device and a decoding device independently determine information bit allocations among different coding schemes of a multi-level coding scheme based on instantaneous channel conditions, computing coding rates for each coding level and allocating bits proportionally to these rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If bit allocations for multi-level coding schemes are pre-configured or standardized, then encoding and decoding can be performed efficiently, but signaling overhead and latency increase
Solution Approach 1:
The encoding device and decoding device independently determine information bit allocations based on instantaneous channel conditions without requiring pre-configuration or standardization. Each device computes coding rates and allocates bits autonomously, eliminating the need for signaling overhead while maintaining encoding efficiency
Solution Approach 2:
The bit allocation scheme transitions from static pre-configuration to dynamic adaptation based on instantaneous channel conditions. The encoding device computes coding rates for each coding level based on current channel state and adjusts bit allocations in real-time, allowing the system to adapt to changing wireless environments without increased signaling
2Device complexity
If bit allocations are pre-configured or standardized, then device complexity is reduced, but adaptability to changing channel conditions deteriorates
Solution Approach 1:
The system changes the parameter of bit allocation from fixed pre-configured values to dynamically computed values based on instantaneous channel conditions. The encoding device computes coding rates for each coding level based on current channel state and adjusts bit allocations accordingly, achieving adaptability without significantly increasing device complexity
Solution Approach 2:
The encoding device independently determines bit allocations based on its own channel condition assessments without requiring complex pre-configured tables or standardized allocation schemes. This self-service approach simplifies device complexity while improving adaptability to changing wireless environments
3Adaptability or versatility
If independent determination of bit allocations is implemented, then adaptability to instantaneous channel conditions is improved, but encoding and decoding complexity increases
Solution Approach 1:
The encoding process is segmented into distinct coding levels, with each level having its own coding rate computation and bit allocation. This segmentation allows the encoding device to independently determine allocations for each level based on channel conditions, achieving adaptability while managing complexity through modular processing
Solution Approach 2:
The system computes coding rates for each coding level based on instantaneous channel conditions and uses these computed parameters to determine bit allocations. By changing the parameter from fixed allocations to computed rates, the system achieves adaptability while the computational process remains manageable through systematic rate calculations
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. In some examples, a device may compute the coding rate associated with each coding level of coded modulation scheme based on one or more channel conditions of a wireless channel. The device may allocate multiple information bits among multiple coding schemes associated with a multi-level coding scheme. The quantity of information bits allocated to each coding scheme may be based on the coding rates associated with one or more coding levels corresponding to the coding scheme. The device may encode an information payload using the multiple coding schemes in accordance with the allocation of the multiple information bits. The device may transmit the encoded information payload via the wireless channel. The receiving device may compute the coding rate associated with each coding level of the multi-level coding scheme and allocate the information bits accordingly. The receiving device may decode the payload.