OFDM Frame Guard Interval Insertion for Extra Payload Utilization
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Solution Overview
Problem
Current broadcasting communication systems face challenges in efficiently utilizing extra regions of payloads in digital broadcasting services, leading to suboptimal data processing efficiency and performance.
Innovation Solution
The proposed solution involves a transmitting apparatus and method that generates frames with orthogonal frequency-division multiplexing (OFDM) symbols, where guard intervals (GIs) and a cyclic postfix (CP) are strategically inserted into the frames to optimize the use of extra payload regions, ensuring efficient data processing by distributing and disposing these regions effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If guard intervals are inserted into OFDM symbols to prevent inter-symbol interference, then signal reliability is improved, but data processing efficiency deteriorates due to unused extra payload regions
Solution Approach 1:
The patent recovers and utilizes the previously discarded extra payload regions by inserting additional guard intervals within these regions. This allows the system to reuse wasted resources for their original protective function while maintaining the benefits of the initial guard intervals
Solution Approach 2:
The patent segments the extra payload regions into multiple sub-regions, with each segment receiving its own guard interval insertion. This segmentation allows for optimized distribution of guard intervals across available space, maximizing resource utilization without compromising signal integrity
2Device complexity
If extra payload regions are left unused to maintain simple frame structure, then device complexity is reduced, but data processing efficiency deteriorates due to wasted resources
Solution Approach 1:
The patent performs preliminary calculation of extra payload region sizes before frame construction, allowing the system to pre-determine optimal guard interval placements. This preliminary action enables efficient resource allocation without adding complex real-time processing requirements
Solution Approach 2:
The patent dynamically adjusts guard interval insertion strategies based on the calculated size of extra payload regions. When extra regions are available, additional guard intervals are inserted; when space is limited, the system adapts its protection strategy, maintaining flexibility without rigid structural constraints
3Productivity
If additional guard intervals are inserted into extra payload regions to improve data processing efficiency, then resource utilization is improved, but device complexity increases due to multiple GI insertion processes
Solution Approach 1:
The patent merges the initial guard interval insertion process with the extra region processing into a unified workflow. By combining these operations, the system achieves improved resource utilization without proportionally increasing processing complexity, as both functions are executed within the same structural framework
Data Source
AI summary
A transmitting apparatus is provided. The transmitting apparatus includes: a frame generator configured to generate a frame including a plurality of orthogonal frequency-division multiplexing (OFDM) symbols; and a guard interval (GI) inserter configured to insert GIs into the generated frame, wherein the plurality of OFDM symbols are divided into a bootstrap, a preamble, and a payload, and the GI inserter inserts first GIs having a size corresponding to a fast Fourier transform (FFT) size of each of OFDM symbols configuring the payload into front ends of each of the OFDM symbols, inserts second GIs having a size corresponding to a quotient obtained by dividing an extra region of the payload calculated based on the FFT size of the OFDM symbols configuring the payload, the number of OFDM symbols, and the size of the first GIs by the number of OFDM symbols into front ends of each of the first GIs, and inserts a cyclic postfix (CP) having a size corresponding to the remainder remaining after dividing the extra region of the payload by the number of OFDM symbols into a rear end of a final OFDM symbol configuring the payload.