RF Signal Reception Using Layer-1 Decoding and Multi-Channel PLPs
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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 reliability and performance of signal transmission and reception.
Innovation Solution
The method involves generating layer-1 information, applying error correction encoding schemes such as LDPC, interleaving, and modulating signals for transmission, while also using a preamble with specific FFT modes and cyclic prefixes to enhance detection and error correction, particularly in the presence of interference like CW interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If error correction encoding schemes are applied to layer-1 information, then error correction capability is improved, but data transmission efficiency deteriorates
Solution Approach 1:
The patent applies different error correction encoding schemes to different parts of the data structure. Specifically, layer-1 information (preamble) uses one encoding scheme while PLP data uses another. This allows optimization of error correction for critical control information without unnecessarily reducing the transmission efficiency of bulk data, thus resolving the contradiction between reliability and productivity.
Solution Approach 2:
The patent segments the transmitted data into distinct layers: layer-1 information (preamble) containing control and configuration data, and PLP (Physical Layer Pipe) data containing actual content. By segmenting the data structure and applying appropriate error correction to each segment, the system achieves reliable transmission of critical information while maintaining overall transmission efficiency.
2Reliability
If interleaving is applied to error-correction-encoded bits, then error correction performance is improved, but processing complexity increases
Solution Approach 1:
The patent performs error correction encoding on layer-1 information before interleaving. This preliminary encoding ensures that the most critical control information is protected against errors before the more complex interleaving operation. By establishing error protection early in the processing chain, the system achieves robust error correction performance while managing processing complexity through staged operations.
3Measurement precision
If preamble detection is performed in delay spread channels, then signal detection capability is improved, but error detection probability increases
Solution Approach 1:
The patent acknowledges that delay spread channels cause errors in preamble detection but converts this harmful effect into a benefit by using the detected errors as information. The system performs preamble detection despite delay spread, uses the results to identify which PLPs are present, and applies error correction encoding to protect the extracted information. This approach transforms the unavoidable error-prone detection into a useful first step in the overall reliable transmission process.
4Quantity of substance
If multiple RF channels are used for transmission, then data transmission capacity is improved, but signal interference increases
Solution Approach 1:
The patent transmits the same PLP data across multiple RF channels simultaneously, changing the transmission parameter from single-channel to multi-channel. This provides frequency diversity, where the same information is received through multiple independent paths, thereby increasing transmission capacity while the error correction encoding compensates for interference on any individual channel.
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.