Shared LDPC Decoder for Multiplexed Data and TMCC Signals
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Solution Overview
Problem
Current receiving apparatuses are inefficient in decoding LDPC-coded data signals and TMCC signals transmitted in a multiplexed manner, leading to increased circuit scale without maintaining decoding performance.
Innovation Solution
A receiving apparatus with an LDPC decoder configured to decode both data and transmission control signals, utilizing a data signal input buffer and a transmission control signal input buffer, and a controller to select and decode the signals, reducing the number of quantized bits in the transmission control signal and handling known signals as probability values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate decoding circuits are used for data signals and transmission control signals, then decoding performance is maintained, but circuit scale increases
Solution Approach 1:
The patent applies universality by designing a single LDPC decoder that can decode both data signals and transmission control signals (TMCC). The decoder is configured to accept different input types and apply appropriate decoding algorithms based on the signal type, eliminating the need for separate dedicated decoders for each signal type while maintaining decoding performance.
Solution Approach 2:
The patent implements dynamics by making the decoder configurable and adaptive. The decoding process dynamically adjusts based on the input signal type - using different algorithms for data signals versus transmission control signals. The system can switch between different decoding modes and handle variable input formats, making the decoder flexible rather than static.
2Measurement precision
If full decoding operations are performed on transmission control signals, then decoding accuracy is maintained, but processing time increases
Solution Approach 1:
The patent applies partial action by performing simplified decoding operations on transmission control signals compared to full decoding operations on data signals. Since transmission control signals have different requirements and characteristics, the system performs only the necessary decoding steps to extract control information, omitting redundant operations that would increase processing time without adding value.
Solution Approach 2:
The patent implements local quality by applying different decoding strategies to different signal types based on their specific requirements. Transmission control signals receive a tailored decoding approach that is optimized for their characteristics, rather than applying a uniform decoding process. This allows the system to maintain adequate decoding accuracy for control signals while reducing processing overhead.
Data Source
AI summary
A receiving apparatus including, an LDPC decoder configured to decode both of the data signal and the transmission control signal, a data signal input buffer arranged before the LDPC decoder and configured to hold the received data signal and a transmission control signal input buffer arranged before the LDPC decoder and configured to hold the received transmission control signal, and a controller configured to select one of the data signal held in the data signal input buffer and the transmission control signal held in the transmission control signal input buffer as a signal subject to decoding and transmit the selected signal to the LDPC decoder to make the LDPC decoder decode the signal subject to decoding.