OFDM Data Mapping for DVB-T2 Transmission Reliability
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Solution Overview
Problem
Current digital broadcasting systems, such as DVB-T2, face challenges in providing enhanced transmission and reception performance, particularly in efficiently mapping and processing data within OFDM symbols to support diverse user demands.
Innovation Solution
A method and apparatus that map first and second data to OFDM symbols, with additional mapping of second data to remaining cells, calculating the length of data blocks based on the number of remaining cells and blocks, and distributing these blocks across the OFDM symbol to optimize data transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If data is mapped only to initial cells of OFDM symbol, then mapping process is simple, but data transmission capacity is insufficient
Solution Approach 1:
The patent segments the data transmission process into two distinct mapping phases: initial mapping of data to the first available cells of OFDM symbols, and subsequent mapping of remaining data to leftover cells. This segmentation allows the system to fully utilize available transmission resources while maintaining a structured and manageable mapping process.
Solution Approach 2:
The patent introduces a temporal dimension to the data mapping process by performing mapping in multiple stages (initial mapping followed by subsequent mapping to leftover cells). This multi-stage approach transforms a single-dimension mapping problem into a multi-dimensional solution, maximizing data capacity without excessive complexity.
2Productivity
If all cells of OFDM symbol are utilized, then transmission efficiency is improved, but data mapping complexity increases
Solution Approach 1:
The patent performs preliminary mapping of data to the first available cells of OFDM symbols before addressing the utilization of leftover cells. This preliminary action establishes a foundation for subsequent mapping operations, allowing the system to systematically fill all available cells while maintaining operational efficiency.
Solution Approach 2:
The patent ensures continuous utilization of OFDM symbol cells by immediately following the initial mapping with a second mapping phase that fills leftover cells. This continuous action eliminates idle resources and maximizes transmission efficiency without creating unnecessary complexity gaps in the process.
3Reliability
If second data is additionally mapped to remaining cells, then reception reliability is enhanced, but processing complexity increases
Solution Approach 1:
The patent employs a copying strategy where second data is additionally mapped to leftover cells that remain after the first mapping process. This creates redundant data representations in different cell locations, enhancing reception reliability through diversity while using a relatively simple copying-based mapping approach rather than complex processing.
Data Source
AI summary
A method of processing data of an Orthogonal Frequency Division Multiplexing (OFDM) symbol, a transmitter and a receiver processing the OFDM symbol are provided. The method performed by the transmitter includes: mapping first data and second data to an OFDM symbol and transmitting a frame including the OFDM symbol. The mapping includes additionally mapping at least a portion of the second data to cells of the OFDM symbol which remain after the first data and the second data are mapped to the OFDM symbol.