Polar Code Bit Transformation for Multi-Level Time Sequence Signaling
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Solution Overview
Problem
Current polar code transmission methods in communications systems, particularly in 5G scenarios, face limitations in efficiently transmitting multiple levels of time sequence information, leading to high latency and limited versions of time sequence information due to the restrictive nature of cyclic shifts and progressive interleaving.
Innovation Solution
The method involves transforming bit sequences at multiple granularities, using cyclic shifts or interleaving to implicitly indicate different levels of time sequence information, allowing for more versions of time sequence information to be transmitted effectively, thereby meeting the requirements of 5G PBCH transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cyclic shifts and progressive interleaving are used to transmit time sequence information, then time sequence information can be transmitted, but the number of versions is limited and latency is high
Solution Approach 1:
The patent divides the bit sequence into multiple segments and applies different transformation granularities to each segment. Specifically, it segments the transformation process into bit-level operations (XOR with pseudo-random sequences) and group-level operations (cyclic shifts), allowing parallel processing and reducing decoding latency while expanding the number of distinguishable time sequence versions.
Solution Approach 2:
The patent introduces a new dimension of transformation by applying transformations at multiple granularities (bit level and group level) simultaneously. This multi-granularity approach creates additional degrees of freedom in the transformation space, exponentially increasing the number of distinguishable time sequence information versions beyond what single-granularity methods can achieve.
2Loss of information
If cyclic shifts are applied to transmit time sequence information, then time sequence information is indicated, but a large set of encoded bits is affected
Solution Approach 1:
The patent segments the bit sequence into groups and applies cyclic shifts at the group level rather than affecting the entire sequence. This segmentation limits the propagation of changes, so that cyclic shifts only affect bits within specific groups rather than all encoded bits, reducing the overall impact on the encoded data.
Solution Approach 2:
The patent applies different transformation operations to different parts of the bit sequence based on local requirements. Bit-level XOR operations are applied to specific positions to indicate time sequence information, while cyclic shifts are applied locally to groups rather than globally to the entire sequence, minimizing the number of affected bits while preserving information indication capability.
Data Source
AI summary
This application provides a polar code transmission method and apparatus. The method includes: transforming a to-be-processed bit sequence at two or more different granularities, where each specific manner at a first granularity is used to implicitly indicate one value in one level of time sequence information, and each specific manner at a second granularity is used to implicitly indicate one value in another level of time sequence information; and sending the transformed (processed) bit sequence, so that different encoded bit sequences can be obtained, and more versions of time sequence information can be implemented, thereby meeting a requirement of transmission in a plurality of levels of time sequences.