Flexible OFDM Frame Configuration for Digital Broadcasting
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Solution Overview
Problem
Existing digital broadcasting systems, such as the DVB-T2 standard, face limitations in flexible frame configuration, which hinders efficient data transmission and reception.
Innovation Solution
The proposed solution involves a transmitting method and apparatus that configure frames with a flexible allocation of time and frequency resources, including a preamble for frame configuration information, and transmission periods using time division, frequency division, and combined time-frequency division.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed frame configuration is used in digital broadcasting systems, then the system structure is simple and reliable, but the flexibility and efficiency of data transmission is limited
Solution Approach 1:
The frame is divided into multiple periods (first period for preamble, second period for time-division transmission, third period for frequency-division transmission, and fourth period for combined transmission), allowing flexible configuration of time and frequency resources while maintaining a structured organization that balances complexity and adaptability
Solution Approach 2:
The frame configuration is made dynamic by allowing the transmitting apparatus to select different transmission modes (time division, frequency division, or combined) based on transmission requirements, enabling the system to adapt to varying conditions without requiring complete structural redesign
2Productivity
If time division and frequency division are used separately, then the transmission method is simple, but the transmission efficiency and resource utilization are insufficient
Solution Approach 1:
The patent combines time division and frequency division into a unified fourth period where both methods are applied simultaneously, allowing the transmitting apparatus to allocate both time and frequency resources for different data streams, thereby improving transmission efficiency and resource utilization without requiring separate implementation of each method
Data Source
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.