Layered Signal Receiver Using Parity-Aided Base Layer Decoding
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Solution Overview
Problem
Current receiver technologies face inefficiencies in processing superposition coding signals, where the decoding time for the upper layer signal increases, thereby prolonging the processing time for the base layer signal, affecting overall signal recovery efficiency.
Innovation Solution
A receiver is designed to generate parity based on the decoding result of the upper layer signal, which is then used to facilitate the decoding of the base layer signal, utilizing Bit-Interleaved Coded Modulation (BICM) encoders, Low Density Parity Check (LDPC) encoding, and parity check matrices to optimize signal processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the upper layer signal is decoded using conventional methods, then the base layer signal can be recovered, but the decoding time for the upper layer signal increases, thereby prolonging the overall processing time
Solution Approach 1:
The patent segments the layered division multiplexing signal into distinct upper layer and base layer components, applying separate decoding processes to each. The upper layer signal is decoded first using its own parity information, and then the base layer signal is decoded using both its own parity and the recovered upper layer signal. This segmentation allows parallel processing paths that reduce overall decoding time while maintaining reliability of both layers.
Solution Approach 2:
The patent performs preliminary decoding of the upper layer signal before proceeding to base layer signal recovery. By pre-decoding the upper layer and generating its parity information in advance, the system prepares necessary data structures and error correction information that will be needed for base layer decoding, thereby reducing the total processing time required for complete signal recovery.
2Measurement precision
If the decoding process for the upper layer signal is thorough and complete, then accurate base layer signal recovery is achieved, but the processing complexity and time increase
Solution Approach 1:
The patent divides the complex decoding process into separate modular stages: upper layer demodulation and decoding, parity generation for upper layer, base layer signal extraction, and base layer decoding. Each module handles a specific function with dedicated algorithms, reducing overall processing complexity while maintaining decoding accuracy through systematic error correction at each stage.
Solution Approach 2:
The patent introduces an intermediary parity generation step that creates parity information from the decoded upper layer signal. This intermediary structure serves as a bridge between upper layer decoding and base layer recovery, providing error correction capability that simplifies the base layer decoding process and maintains accuracy without requiring direct complex interaction between the two layers.
Data Source
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AI summary
Provided is a receiver which includes at least one processor configured to control or execute: a first Bit-Interleaved Coded Modulation (BICM) decoder configured to generate a first output signal corresponding to an upper layer signal by processing a first input signal which includes a superposition coding signal generated at a transmitter by superimposing the upper layer signal and a lower layer signal; a parity generator configured to generate at least one parity based on a result of the processing of the first input signal by the first BICM decoder; and a second BICM decoder configured to generate a second output signal corresponding to the lower layer signal by processing a second input signal which is generated using the parity generated by the parity generator.