Broadcast Signal Transmission with Adaptive MIMO and MISO Modes
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Solution Overview
Problem
Digital broadcast systems face challenges in enhancing data transmission efficiency and maintaining compatibility with conventional methods, particularly in robustness and flexibility for mobile and indoor reception.
Innovation Solution
A broadcast signal transmitter using MIMO technology to enhance data transmission efficiency and robustness, while maintaining compatibility with conventional systems by employing MIMO processing for diverse environments and scalable video coding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If MIMO processing is implemented to enhance data transmission efficiency and robustness, then transmission reliability improves, but device complexity increases
Solution Approach 1:
The MIMO transmission system is segmented into multiple independent transmission paths (antennas), each handling specific data streams. The transmission scheme divides data into multiple layers that can be processed and transmitted separately through different antenna combinations, reducing the complexity of overall MIMO processing while maintaining transmission reliability.
Solution Approach 2:
The system dynamically adapts between different transmission modes (MIMO, MISO, SISO) based on channel conditions and receiver capabilities. This dynamic adaptation allows the system to maintain high reliability when MIMO is beneficial while reducing complexity by falling back to simpler modes when appropriate, resolving the contradiction between reliability and device complexity.
2Productivity
If MIMO system is introduced to improve data transmission efficiency, then productivity increases, but ease of operation decreases
Solution Approach 1:
The MIMO transmission apparatus is designed with multi-functionality to handle various transmission modes (MIMO, MISO, SISO) and different service types within a single system framework. This universal design allows the system to achieve high data transmission efficiency while maintaining ease of operation through standardized interfaces and unified control mechanisms that simplify user interaction despite the underlying complexity.
Solution Approach 2:
The system automatically selects and configures the optimal transmission mode based on channel conditions and receiver capabilities without requiring manual intervention. This self-service capability enables high productivity through efficient automatic mode selection while maintaining ease of operation by eliminating the need for user configuration of complex MIMO parameters.
3Reliability
If MIMO processing is used to enhance robustness for mobile reception, then reliability improves, but device complexity increases
Solution Approach 1:
The reception device implements MIMO processing with local quality optimization by selectively applying complex processing only where needed based on signal conditions. For example, simple reception modes are used when signal quality is sufficient, while advanced MIMO processing is activated only in challenging mobile reception scenarios, thereby improving reception robustness without consistently increasing device complexity.
Solution Approach 2:
The reception device dynamically adjusts its processing complexity based on detected signal conditions and mobility state. This dynamic adaptation allows the device to maintain high reception robustness in mobile environments by activating appropriate MIMO processing only when necessary, rather than maintaining constant high complexity processing that would be unnecessary in stable reception conditions.
Data Source
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AI summary
Disclosed is a broadcasting signal transmitter. A broadcasting signal transmitter, according to one embodiment of the present invention, comprises: a BICM encoder, which FEC encodes and bit interleaves PLP data and signaling information; a frame builder, which cell maps the PLP data and said signaling information, and builds a frame; a MISO encoder, which MISO encodes the PLP data and the signaling information for MISO transmission included in the PLP data; and an OFDM generator, which OFDM modulates the PLP data and signaling information, wherein the BICM encoder includes a first BICM block, which MIMO encodes first PLP data for MIMO transmission included in the PLP data, and the first BICM block includes a constellation mapper that symbol maps the first PLP data, a MIMO encoder that MIMO encodes the symbol mapped first PLP data, and a cell interleaver that interleaves the MIMO encoded first PLP data into cell units.