Broadcast Signal Receiver Preamble Parsing for Robust OFDM Reception
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Solution Overview
Problem
Current digital broadcast systems face challenges in data transmission efficiency, robustness, and network flexibility, especially for mobile reception equipment and indoor environments, due to the large amounts of data and varying service requirements.
Innovation Solution
A broadcast signal receiver and method that utilize a preamble structure with a minimum number of carriers (NoC) to indicate the FFT size, allowing for efficient demodulation and processing of broadcast signals, enabling flexible service delivery and improved Quality of Service (QoS) through 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 segmented into multiple logical channels (transport streams, service streams, data streams) that can be independently processed and transmitted. This segmentation allows efficient resource allocation and multiplexing, improving data transmission efficiency while supporting diverse services including HD video, multichannel audio, and additional data services
2Adaptability or versatility
If digital broadcast signals include HD images and multichannel audio, then service quality is improved, but network robustness deteriorates
Solution Approach 1:
The system employs configurable transmission parameters including variable modulation schemes (QPSK, 16-QAM, 64-QAM), adjustable code rates for forward error correction, and configurable guard intervals. These parameter changes enable the system to maintain network robustness while supporting high-quality HD video and multichannel audio transmission by adapting to different channel conditions
3Adaptability or versatility
If broadcast systems support mobile reception equipment, then network flexibility is improved, but signal reception robustness deteriorates
Solution Approach 1:
The broadcast system implements dynamic parameter adaptation for mobile reception, including adjustable guard interval lengths to compensate for multipath effects, configurable FFT sizes for different Doppler conditions, and adaptive equalization parameters. These dynamic adjustments maintain signal reception robustness while supporting mobile and handheld reception equipment across varying motion conditions
Data Source
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AI summary
Disclosed herein is a broadcast signal receiver. A broadcast signal receiver according to an embodiment of the present invention includes a synchronization/demodulation module configured to perform signal 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 perform FEC decoding on the data, and an output processing module configured to receive the data of the at least one PLP and to output a data stream.