Broadcast Signal Receiver Using PLP Framing for Robust Mobile Reception
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Solution Overview
Problem
Current digital broadcast signal transmission technologies face challenges in data transmission efficiency, robustness, and network flexibility, especially for mobile reception and indoor environments, due to the large amount of video/audio data and additional services provided.
Innovation Solution
A broadcast signal receiver employing a Fast Fourier Transform (FFT) module for Orthogonal Frequency Division Multiplexing (OFDM)-demodulation, pilot detection, frame parsing, and Forward Error Correction (FEC) decoding, along with an output processing module to convert Physical Layer Pipe (PLP) data into a bit stream, enabling improved data transmission efficiency and robustness using Multiple Input Multiple Output (MIMO) systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If digital broadcast signals transmit large amounts of video/audio data and additional services, then service functionality is improved, but data transmission efficiency deteriorates
Solution Approach 1:
The broadcast signal is divided into multiple Physical Layer Pipes (PLPs), each capable of carrying different types of data (video, audio, additional services). This segmentation allows efficient resource allocation and transmission optimization for different data types, improving overall transmission efficiency while maintaining service functionality.
Solution Approach 2:
The patent introduces a hierarchical signaling structure with multiple layers (L1-basic, L1-detail, L2 signaling) that organize transmission parameters and service information in different dimensions. This multi-dimensional signaling approach enables efficient management of large amounts of data by structuring information transmission in an organized manner.
2Adaptability or versatility
If digital broadcast signals include various additional services, then service diversity is improved, but transmission robustness deteriorates
Solution Approach 1:
Different PLPs are assigned different modulation and coding schemes (MCS) according to their specific requirements. Critical services receive more robust encoding while less critical data uses higher efficiency schemes. This localized optimization of transmission parameters maintains robustness for essential services while enabling diverse service functionality.
Solution Approach 2:
The signaling structure allows dynamic allocation of transmission resources and parameters. The L1 and L2 signaling layers enable real-time configuration of PLP parameters, modulation schemes, and coding rates based on channel conditions and service requirements, maintaining robustness while supporting service diversity.
3Reliability
If broadcast signals are optimized for fixed reception, then reception quality is improved, but mobile reception capability deteriorates
Solution Approach 1:
The broadcast signal structure is designed to be universally compatible with both fixed and mobile reception equipment. The PLP-based framework and hierarchical signaling enable the same transmission system to serve different reception scenarios by dynamically adjusting parameters, allowing one system to fulfill multiple reception requirements.
Solution Approach 2:
The patent employs configurable transmission parameters including multiple PLP configurations, variable modulation schemes, and adjustable coding rates that can be changed based on reception conditions. The L1-L2 signaling structure enables dynamic parameter adjustment to optimize for either fixed or mobile reception scenarios as needed.
Data Source
AI summary
A broadcast signal receiver includes a tuner configured to receive a broadcast signal; a pilot detector configured to detect pilots included in the broadcast signal; a de-framer configured to de-frame a signal frame of the broadcast signal and to extract Physical Layer Pipe (PLP) data from the signal frame; and a decoder configured to decode the PLP data, wherein the signal frame comprises a bootstrap, a preamble, and the PLP data, wherein the bootstrap comprises first information for indicating system bandwidth, second information for emergency alert wake up, and third information for indicating structure of the preamble, wherein the preamble comprises a plurality of preamble symbols, the preamble carrying Layer 1 (L1) signaling data for the signal frame, and wherein the foremost preamble symbol comprises fourth information indicating a number of at least one remaining preamble symbol.