Broadcast Signal Receiver for OFDM PLP Decoding and 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 amounts 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, a pilot detector, frame parsing module, demapping and decoding module, and output processing module to process broadcast signals, including Scattered Pilots (SPs) and Subframe Boundary Symbols (SBS), which allows for 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 quality and functionality are improved, but data transmission efficiency and network robustness deteriorate
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 diversity
Solution Approach 2:
The patent employs 3D time-frequency-sparsity domain processing for signal reconstruction, adding a sparsity dimension to the traditional time-frequency domain. This enables more efficient compression and transmission of large amounts of broadcast data, improving transmission efficiency without sacrificing service functionality
2Adaptability or versatility
If digital broadcast signals include various additional services and HD content, then service quality is improved, but transmission robustness deteriorates
Solution Approach 1:
Forward Error Correction (FEC) codes are applied to the broadcast signal before transmission, adding redundant information that enables the receiver to correct errors without retransmission. This cushioning against transmission errors maintains robustness even when transmitting large amounts of data with additional services
Solution Approach 2:
The patent dynamically adjusts transmission parameters including modulation schemes, coding rates, and PLP configurations based on channel conditions and service requirements. This adaptability allows the system to maintain robustness while providing high-quality services with various additional content
3Adaptability or versatility
If broadcast signals support mobile reception equipment, then network flexibility is improved, but reception reliability deteriorates
Solution Approach 1:
The patent implements dynamic PLP allocation and configuration that adapts to mobile reception conditions. Different PLPs can be assigned different robustness levels and modulation schemes based on mobility patterns and channel conditions, maintaining reliability while supporting flexible mobile access
Solution Approach 2:
Different portions of the broadcast signal (different PLPs) are assigned different quality characteristics and robustness levels according to their specific requirements. Video data may use more robust modulation while additional services use higher order modulation, optimizing overall reception reliability for mobile devices
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.