LDPC Block Encoding for L1 Signaling in Wireless Systems
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently encoding control information to minimize transmission errors, particularly in the transmission of L1 signaling information, which affects the stability of wireless communication services.
Innovation Solution
The method involves encoding L1 signaling information into multiple LDPC blocks, ensuring each block has an equal number of bits by adding padding bits, and using LDPC codes to maintain consistent decoding performance, while also considering modulation schemes and transmit diversity antenna technology.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control information is encoded using traditional encoding schemes, then the encoding process is simple, but the decoding performance varies significantly with input bit length, leading to transmission errors
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the LDPC encoding parameters (block length, code rate, parity bits) based on the input bit length. This ensures that the decoding performance remains consistent regardless of the varying input size, resolving the contradiction between reliability and complexity by making the encoding parameters adaptive rather than fixed
Solution Approach 2:
The patent implements dynamics by creating a flexible encoding structure where the LDPC code parameters can be dynamically adjusted according to the actual data length. This dynamic adaptation allows the system to maintain optimal decoding performance across different input sizes without requiring a completely complex fixed-structure encoder
2Reliability
If L1 signaling information is transmitted without dividing into multiple blocks, then the transmission process is simple, but the decoding performance is unstable when input bit length varies
Solution Approach 1:
The patent applies segmentation by dividing the L1 signaling information into multiple LDPC blocks when the total bit length exceeds a threshold. This segmentation allows each block to be encoded with appropriate parameters, improving decoding stability. The segmentation is combined with padding to ensure each block reaches the required length for consistent performance
Solution Approach 2:
The patent implements preliminary action by performing padding operations before encoding to ensure each LDPC block reaches the required bit length. This preliminary preparation ensures that the encoding process starts with properly sized blocks, which maintains decoding performance stability without requiring complex real-time adjustments during encoding
Data Source
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AI summary
A method and apparatus for transmitting control information in a communication system is provided. The number of LDPC blocks, through which L1 post-signaling information is to be transmitted, is determined according to the total number of bits of the L1 post-signaling information. The number of input information bits of each LDPC block is calculated when the determined number of LDPC blocks is plural. The number of puncturing bits among parity bits of each LDPC block is determined considering a modulation order. A frame including one or multiple LDPC blocks generated through the preceding steps is transmitted.