Broadcast Signal Reception Using MIMO and PLP-Based QoS Control
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Solution Overview
Problem
Digital broadcast systems face challenges in data transmission efficiency, robustness, and network flexibility, particularly in 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 and method that processes data based on service characteristics to control Quality of Service (QoS), uses Multiple Input Multiple Output (MIMO) systems for improved transmission efficiency and robustness, and supports various broadcast services through the same RF signal bandwidth, enabling error-free digital broadcast signal transmission even with mobile equipment or in indoor settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If digital broadcast systems 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 frames, with each frame containing specific data structures (PLS1, PLS2, service data). This segmentation allows efficient organization and transmission of large amounts of data while maintaining service functionality.
Solution Approach 2:
The patent introduces a hierarchical data structure with multiple layers (frame level, symbol level, data pipe level) to organize broadcast data. This multi-dimensional organization enables efficient transmission of diverse services while maintaining high data transmission efficiency.
2Adaptability or versatility
If digital broadcast systems handle large amounts of data, then service variety is improved, but robustness of transmission/reception networks deteriorates
Solution Approach 1:
The patent inserts pilot signals and synchronization information at predetermined positions in the broadcast frame before actual data transmission. This preliminary action enables receivers to synchronize and estimate channel conditions in advance, improving robustness against mobile reception and indoor environment challenges.
Solution Approach 2:
The patent employs forward error correction (FEC) coding and repeats critical information (PLS1, PLS2) across multiple frames to provide redundancy. This beforehand cushioning protects against data loss and ensures reliable reception even in challenging environments.
3Adaptability or versatility
If digital broadcast systems support mobile reception equipment, then network flexibility is improved, but reception reliability deteriorates
Solution Approach 1:
The patent uses OFDM modulation with adjustable parameters (FFT size, guard interval length, pilot pattern) that can be dynamically configured based on channel conditions. This dynamic adaptation enables reliable reception for mobile equipment while maintaining network flexibility.
Solution Approach 2:
The patent changes key transmission parameters including modulation scheme, coding rate, and pilot density based on service characteristics and channel conditions. These parameter changes optimize reception reliability for mobile devices while maintaining system flexibility.
Data Source
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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.