Flexible Frame Configuration for Digital Broadcasting
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Solution Overview
Problem
Existing digital broadcasting systems, such as DVB-T2, face limitations in flexible frame configuration, which restricts efficient data transmission and reception quality.
Innovation Solution
The implementation of a transmitting and receiving apparatus that uses a flexible frame configuration, incorporating MIMO methods, space time block codes, and pilot symbol insertion for precise channel estimation and data transmission, allowing for efficient data transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a fixed frame configuration is used in digital broadcasting systems, then system stability is maintained, but transmission efficiency and adaptability are limited
Solution Approach 1:
The patent implements dynamic frame configuration where the frame structure can be flexibly adjusted based on transmission conditions. The frame includes configurable parameters such as the number of symbols per frame, guard interval length, and pilot symbol positions, allowing the system to adapt to different channel conditions and service requirements while maintaining stable operation through standardized adjustment procedures
2Measurement precision
If pilot symbols are sparsely distributed, then data transmission capacity is maximized, but channel estimation precision deteriorates
Solution Approach 1:
The patent applies local quality by distributing pilot symbols at specific positions within the frame structure rather than uniformly throughout. The pilot symbols are placed at predetermined positions that provide sufficient channel estimation accuracy for local regions while minimizing their overall proportion in the frame, thus balancing estimation precision with data transmission capacity
3Productivity
If MIMO transmission is implemented, then data transmission rate is increased, but system complexity increases
Solution Approach 1:
The patent segments the MIMO transmission system into distinct functional components: separate processing for multiple data streams, independent channel estimation for each stream using distributed pilot symbols, and structured frame configuration that organizes multiple layers. This segmentation allows the complex MIMO system to be managed through modular, standardized procedures while achieving high transmission rates
Data Source
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AI summary
Provided are a frame configuring unit configured to configure a frame using a plurality of orthogonal frequency-division multiplexing (OFDM) symbols, by allocating time resources and frequency resources to a plurality of transmission data, and a transmitter which transmits the frame. The frame includes a first period in which a preamble which includes information on a frame configuration of the frame is transmitted, a second period in which a plurality of transmission data are transmitted by time division, a third period in which a plurality of transmission data are transmitted by frequency division, and a fourth period in which a plurality of transmission data are transmitted by time division and frequency division.