Polar Broadcast Coding for Mixed Channel Capacity Decoding
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Solution Overview
Problem
In broadcast communication systems, existing polar coding methods waste resources by designing encoding schemes based on the smallest channel capacity, failing to fully utilize the capacities of terminal devices with better channel conditions.
Innovation Solution
The proposed method involves performing first and second polar encoding on separate information bit sets, allowing terminal devices with small and large channel capacities to decode different amounts of information, thereby optimizing the use of channel capacities and reducing resource waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polar coding scheme is designed based on terminal device with smallest channel capacity, then all terminal devices can decode correctly, but terminal devices with larger channel capacity cannot fully utilize their channel resources
Solution Approach 1:
The information bit set is divided into multiple subsets with different sizes. Terminal devices with smaller channel capacities decode only the first subset, while terminal devices with larger channel capacities decode both the first and second subsets. This segmentation allows each terminal to utilize its channel capacity appropriately without wasting resources.
Solution Approach 2:
Different terminal devices receive different amounts of information based on their local channel conditions. Terminal devices with better channel qualities are allocated additional information bits, while those with poorer channel qualities receive only the essential first subset. This local quality adjustment optimizes resource allocation to match each terminal's decoding capability.
2Productivity
If polar coding scheme is designed to maximize channel capacity utilization, then terminal devices with large channel capacity can decode all information, but terminal devices with small channel capacity cannot decode correctly
Solution Approach 1:
The coding scheme dynamically adapts to different terminal device channel capacities. The network device determines the channel capacity of each terminal and allocates different information bit set sizes accordingly. This dynamic adjustment ensures that each terminal receives an appropriate amount of information that matches its decoding capability, achieving both high productivity and reliability.
Solution Approach 2:
The information bit set size parameter is changed based on terminal device channel capacity. Terminal devices with smaller channel capacities are assigned smaller information bit sets that they can decode correctly, while terminal devices with larger channel capacities are assigned larger information bit sets that fully utilize their channel resources. This parameter adaptation resolves the contradiction between productivity and reliability.
3Device complexity
If single polar encoding is performed on all information, then encoding complexity is low, but resource utilization efficiency is poor
Solution Approach 1:
The information bit set is segmented into multiple subsets, and separate polar encoding is performed on each subset. This segmentation increases resource utilization efficiency by allowing different encoding parameters for different subsets, while the overall complexity remains manageable through systematic encoding procedures.
Solution Approach 2:
The polar encoding apparatus performs multiple encoding functions: it encodes the first information bit set for all terminal devices, and additionally encodes the second information bit set for terminal devices with larger channel capacities. This multi-functionality approach improves resource utilization while maintaining reasonable complexity through shared encoding infrastructure.
Data Source
AI summary
Embodiments of the present disclosure disclose obtaining to-be-encoded first information that includes first and second information bit sets. The bits included in the first information bit set are obtained through decoding by a plurality of terminal devices. The bits included in the second information bit set are able to be obtained through decoding by some of the plurality of terminal devices. Polar encoding is first performed on the first information bit set to obtain first encoded information. Polar encoding is then performed on the second information bit set based on the first encoded information to obtain second encoded information.