External Digital Coding for DVB-T2 Control Transmitter Upgrades
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Solution Overview
Problem
Existing digital radio transmission systems, such as DVB-T, are not adaptable to newer standards like DVB-T2, requiring entire control transmitter replacements due to higher data volume demands, which is costly and inefficient.
Innovation Solution
A coding device that converts digital datastreams into digital-baseband or intermediate-frequency signals in the time domain, using an asynchronous-serial interface for external coding, allowing the control transmitter to be updated with software rather than replaced, enabling compatibility with new standards without hardware changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the control transmitter is replaced to support new radio standards like DVB-T2, then compatibility with new standards is achieved, but cost and complexity increase due to full hardware replacement
Solution Approach 1:
The system is divided into two independent parts: an external coding device that performs the complex coding function, and the existing control transmitter that handles transmission. This segmentation allows the coding function to be upgraded independently without replacing the entire control transmitter, thus achieving new standard compatibility while avoiding full hardware replacement.
Solution Approach 2:
An external coding device is introduced as an intermediary component between the data source and the control transmitter. This intermediary handles the complex coding requirements of new standards, allowing the control transmitter to remain unchanged while still supporting new standards through the intermediary's processing capabilities.
2Productivity
If the control transmitter is replaced to handle larger data volumes, then data transmission capacity is improved, but cost increases due to hardware replacement
Solution Approach 1:
The coding function, which is responsible for handling larger data volumes according to new standards, is extracted from the control transmitter and placed in an external device. This extraction allows the control transmitter to maintain its existing hardware while the external coding device handles the increased data processing requirements, thereby improving productivity without incurring replacement costs.
Solution Approach 2:
The system achieves increased data transmission capacity by changing the coding parameters and algorithms in the external coding device rather than changing the physical hardware of the control transmitter. This allows the system to adapt to new standards with higher data volumes through software/parameter changes in the external device, avoiding expensive hardware replacement.
3Adaptability or versatility
If the control transmitter is reprogrammed to support new standards, then adaptability is improved, but functionality is insufficient as reprogramming alone cannot meet new requirements
Solution Approach 1:
The system functionality is segmented such that the external coding device handles the complex coding operations required by new standards, while the control transmitter maintains its existing transmission functions. This segmentation allows each component to specialize in its strength, ensuring both adaptability to new standards and functional reliability without relying on insufficient reprogramming alone.
Data Source
AI summary
The invention relates to a method and a system for external, digital coding of a baseband or intermediate-frequency signal. Initially, a digital datastream is converted in a coding device into a digital-baseband signal in the time domain or into a digital intermediate-frequency signal in the time domain. The digitally generated signal is output via an asynchronous-serial interface of the coding device to another device. Such a device also provides an asynchronous-serial interface, which is connected to the asynchronous-serial interface of the coding device. The device reads in the output digital-baseband signal or intermediate-frequency signal for further processing.