Broadcast Signal Receiver with PLP Decoding for Robust OFDM 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 amounts of video/audio data and additional services they need to handle.
Innovation Solution
A broadcast signal receiver equipped with a Fast Fourier Transform (FFT) module for Orthogonal Frequency Division Multiplexing (OFDM)-demodulation, a pilot detector, frame parsing module, demapping and decoding module, and output processing module, which processes Physical Layer Pipe (PLP) data with Forward Error Correction (FEC) and controls Quality of Service (QoS) based on service characteristics, enabling efficient transmission and reception of digital broadcast signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If digital broadcast signal transmission is implemented to provide HD images, multi-channel audio and additional services, then service functionality is improved, but data transmission efficiency deteriorates due to large amounts of data
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 each data type, improving overall transmission efficiency while maintaining full service functionality.
Solution Approach 2:
The patent introduces a hierarchical signaling structure with multiple layers (PLS1, PLS2, PLS3) that organize and manage data transmission in different dimensions. This multi-layer signaling approach enables efficient control and management of large data volumes by distributing control information across different signaling layers, thereby improving data transmission efficiency.
2Reliability
If robust transmission/reception networks are implemented for digital broadcast signals, then transmission reliability is improved, but network complexity increases
Solution Approach 1:
Forward Error Correction (FEC) codes are applied to the PLP data before transmission, and pilot signals are embedded in advance in the broadcast signal. These preliminary actions enable the receiver to correct errors and synchronize without requiring complex real-time processing, thereby improving transmission reliability while keeping network complexity manageable.
Solution Approach 2:
Pilot signals serve as intermediaries between the transmitter and receiver, enabling synchronization, channel estimation, and signal detection without requiring complex direct interaction between transmission components. This intermediary approach simplifies the overall network complexity while maintaining high transmission reliability.
3Adaptability or versatility
If network flexibility is improved for mobile reception equipment, then adaptability is improved, but data transmission efficiency deteriorates
Solution Approach 1:
The patent employs dynamic PLP configuration where the number, size, and allocation of Physical Layer Pipes can be adjusted according to service requirements and channel conditions. This dynamic adaptability allows the system to optimize data transmission efficiency for mobile reception equipment while maintaining network flexibility to support various service types.
Solution Approach 2:
The system allows dynamic changing of transmission parameters including modulation schemes, coding rates, and PLP configurations based on channel quality and service requirements. This parameter adaptability enables efficient data transmission across varying mobile reception conditions while maintaining network flexibility.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution improves data transmission efficiency, increases robustness, and provides transmission flexibility, allowing for error-free reception of digital broadcast signals even with mobile equipment or in indoor environments, while supporting various broadcast services through the same RF signal bandwidth.
Implementation Method 1
a Fast Fourier Transform (FFT) module configured to Orthogonal Frequency Division Multiplexing (OFDM)-demodulate a received broadcast signal
Data Source
AI summary
Disclosed herein is a broadcast signal receiver. The broadcast signal receiver according to an embodiment of the present invention includes a synchronization and demodulation module configured to perform detection and OFDM demodulation on a received broadcast signal, a frame parsing and deinterleaving module configured to parse and deinterleave the signal frame of the broadcast signal, a demapping and decoding module configured to convert the data of at least one Physical Layer Pipe (PLP) of the broadcast signal into a bit domain and to FEC-decode the PLP data, and an output processing module configured to receive the data of the at least one PLP and to output the received data in a data stream form.