RF Signal Reception Using Layer-1 LDPC Shortening and Puncturing
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Solution Overview
Problem
Current digital broadcasting technologies face challenges in improving data transmission efficiency and error correction capabilities, particularly with increasing data sizes and the number of broadcasting channels, which affects the reception of high-definition video and audio signals.
Innovation Solution
The method involves generating layer-1 information, applying error correction encoding schemes such as LDPC with shortening and puncturing, interleaving bits, and modulating signal frames for transmission via RF channels, while the receiving apparatus demodulates, deinterleaves, and decodes the signals to extract physical layer pipes, enhancing error correction and reception performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If error correction encoding schemes with shortening and puncturing are applied to layer-1 information, then error correction capability is improved, but device complexity increases
Solution Approach 1:
The encoding process is segmented into distinct stages: initial error correction encoding of layer-1 information, shortening by removing redundant parity bits, puncturing by selectively removing additional parity bits, and deinterleaving. Each stage processes the data independently, allowing the system to achieve high error correction capability while managing complexity through modular processing steps.
Solution Approach 2:
The patent applies preliminary error correction encoding to layer-1 information before transmission, and performs shortening and puncturing in advance of the actual transmission. The receiving end has corresponding preliminary decoding operations ready to reverse these transformations. This preliminary action ensures that error correction is already in place before the signal undergoes channel impairments.
2Productivity
If data transmission efficiency is improved by increasing data size and number of channels, then productivity increases, but reliability decreases
Solution Approach 1:
The patent applies different error correction strategies to different parts of the transmitted signal. Layer-1 information undergoes specific error correction encoding with shortening and puncturing, while other data portions use standard encoding. This local quality approach ensures that critical control information has enhanced error protection while maintaining overall high data transmission efficiency through selective rather than universal complex encoding.
Data Source
AI summary
A method is provided for receiving a signal. The method includes receiving a signal transmitted in a radio frequency (RF) band including at least one RF channel, demodulating the received signal, parsing a preamble of a signal frame including layer-1 information from the demodulated signal, deinterleaving bits of the layer-1 information, decoding the deinterleaved bits using an error correction decoding scheme including a shortening scheme and a puncturing scheme and obtaining physical layer pipes (PLPs) from the signal frame using the error-correction-decoded layer-1 information.