Satellite Transmission Unit Regular Grid Pilot Packets
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Solution Overview
Problem
Conventional DVB-S2 systems require significant computing power for decoding and synchronization due to the lack of a regular grid structure in data streams, making it difficult for older devices to be compatible with modern systems and requiring extensive demodulation before determining the relevance of a data stream.
Innovation Solution
A satellite transmitting unit that generates output data streams with pilot data packets at regular intervals, allowing for early demultiplexing and synchronization at the bit transmission level, and a receiving unit that uses these pilot packets to quickly identify relevant data sections and reduce computational complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional DVB-S2 systems are used without regular grid structure, then data transmission can be established, but computing power requirements for decoding and synchronization become excessively high
Solution Approach 1:
The data stream is segmented into regular grid structures with pilot packets inserted at fixed intervals. This segmentation creates a predictable pattern that enables simpler synchronization and decoding processes, reducing the computing power required while maintaining reliable data transmission.
Solution Approach 2:
Pilot packets are introduced as intermediary elements within the data stream. These pilot packets serve as reference markers that facilitate synchronization and decoding without requiring extensive computational resources, acting as a mediator between the transmitted data and the reception process.
2Measurement precision
If complete demodulation is performed before determining data stream relevance, then accurate identification of relevant streams is achieved, but processing time and computational resources are excessively consumed
Solution Approach 1:
The regular grid structure with pilot packets enables preliminary synchronization and partial decoding before complete demodulation. This preliminary action allows the receiver to identify relevant data streams earlier in the processing chain, reducing the time and resources needed for complete demodulation of all streams.
Solution Approach 2:
The pilot packets are extracted as separate reference elements that can be processed independently to determine data stream relevance. This extraction allows the system to identify relevant streams based on pilot packet patterns without requiring complete demodulation of the entire data stream first.
3Adaptability or versatility
If older devices are to operate within modernized DVB-S2 systems, then system compatibility is improved, but the complexity of supporting both old and new standards increases
Solution Approach 1:
The regular grid structure with pilot packets is designed to be universally compatible with both older devices and modern DVB-S2 systems. This multi-functional approach allows the same transmission framework to serve legacy equipment while enabling advanced features, thereby improving adaptability without proportionally increasing system complexity.
Data Source
Figure 1~2
Figure 3~4
AI summary
According to the invention, an improved satellite transmission unit is to be provided that enables efficient decoding of transmitted data streams.This task is solved by a satellite transmitting unit comprising: - a packet splitting device (12) for generating payload data packets (4, 4', 4") with a preferably constant payload data packet length from an input data stream (1); - a pilot generation device (17) for generating pilot data packets (7 - 7''); - a header generation device (15) for generating header data packets (5, 5', 5") with information relating to the input data stream (1), in particular relating to the modulation method and/or coding method used; - a linking device (18) for combining the user data packets (4, 4', 4"), the header data packet (5, 5', 5") and the pilot data packets (7 - 7") to form an output data stream (3), wherein at least one pair of pilot data packets (7 - 7") encloses a plurality of user data packets (4, 4', 4") and at least one header data packet (5, 5', 5").