Broadcast Signal Frame Structure for MIMO Compatibility
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Solution Overview
Problem
Current digital broadcast systems face inefficiencies in data transmission and compatibility issues, particularly in maintaining robustness and compatibility with conventional systems, especially in diverse environments and indoor or mobile reception scenarios.
Innovation Solution
The implementation of a MIMO (Multi-Input Multi-Output) system for transceiving broadcast signals, which includes OFDM-demodulation, parsing of transmission frames with preambles and PLP data, and decoding using SISO, MISO, or MIMO methods, while maintaining compatibility with conventional systems through scalable video coding and additional signaling information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a MIMO system is implemented to enhance data transmission efficiency, then data transmission efficiency and robustness are improved, but device complexity and system compatibility become worsened
Solution Approach 1:
The transmission frame is segmented into distinct components including preamble, PLP data, and signaling information. The PLP data is further divided into base layer and enhancement layer, allowing the receiver to process signals in a structured manner and selectively decode based on capability, thereby managing complexity while maintaining efficiency
Solution Approach 2:
The system dynamically adapts between different transmission modes (SISO, MISO, MIMO) based on receiver capability and channel conditions. The signaling information dynamically indicates the transmission mode and decoding parameters, allowing the system to optimize data transmission efficiency while maintaining compatibility with various receiver types
2Reliability
If advanced MIMO decoding techniques are used to improve robustness in diverse environments, then transmission robustness is enhanced, but compatibility with conventional systems deteriorates
Solution Approach 1:
The transmission frame structure is designed to be universal, supporting multiple transmission modes (SISO, MISO, MIMO) within a single standardized format. The preamble contains signaling information that indicates the transmission mode, allowing conventional receivers to handle basic transmissions while advanced receivers can utilize MIMO capabilities when supported
Solution Approach 2:
The system implements optional enhancement layers that provide additional robustness and efficiency only when needed. Receivers can selectively process the base layer for basic compatibility or decode both base and enhancement layers for improved performance, allowing partial adoption of advanced features without requiring full system upgrade
Data Source
AI summary
The broadcast-signal transmitter according to one embodiment of the present invention includes: an encoder for encoding physical layer pipe (PLP) data, including a base layer and an enhancement layer of a broadcasting service, and signaling information through a SISO, and/or MIMO technique; a frame builder for generating a transmission frame, which includes a preamble having the encoded signaling information and the PLP data and an OFDM generator for modulating and transmitting a broadcast signal including the transmission frame.