Mobile Broadcast Reception Using FIC Signaling and Channel Equalization

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Solution Overview

Problem

The Vestigial Sideband (VSB) transmission mode used in digital broadcasting systems is prone to performance deterioration in poor channel environments, especially when using portable or mobile receivers, and lacks resistance to channel changes and noise.

Innovation Solution

A digital broadcasting system comprising a receiving unit, a system information handler, and a decoding unit that processes broadcast signals to extract encoding format information for IP stream components, using pre-decided IP access information and known data sequences for demodulation and channel equalization, and refers to Fast Information Channel (FIC) signaling data for selective data group acquisition.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If VSB transmission mode is used for digital broadcasting, then the system can maintain compatibility with existing standards and infrastructure, but the receiving performance deteriorates in poor channel environments and mobile scenarios

Engineering Contradiction:

Improvecompatibility with existing standardsVSAvoidreceiving performance

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent segments the transmitted signal into multiple components including pilot signals, data signals, and reference signals that can be independently processed. This segmentation allows the receiver to extract and utilize specific signal components for channel estimation and equalization, improving reliability in mobile environments while maintaining VSB compatibility

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements preliminary channel estimation and equalization using known pilot sequences before actual data reception. By pre-characterizing the channel response and preparing equalization filters in advance, the system compensates for channel variations proactively, enhancing receiving performance in changing mobile conditions

Inventive Principle:

Principle #10Preliminary action

2Device complexity

If VSB transmission mode is used, then the system structure remains simple and standardized, but resistance to channel changes and noise is insufficient

Engineering Contradiction:

Improvesystem structureVSAvoidresistance to channel changes and noise

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The patent introduces pilot signals and reference sequences as intermediary elements between the transmitter and receiver. These intermediaries carry channel information that mediates the effect of channel variations and noise, enabling the receiver to compensate for harmful effects without fundamentally changing the VSB transmission structure

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces purely mechanical signal transmission with a hybrid approach that incorporates digital signal processing techniques such as adaptive equalization and channel estimation. This substitution introduces intelligence to the system, enabling it to dynamically compensate for channel changes and noise while maintaining the underlying VSB framework

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Adaptability or versatility

If mobile service data are transmitted using VSB mode, then the broadcast can reach portable and mobile receivers, but the receiving performance deteriorates due to poor resistance to channel changes

Engineering Contradiction:

Improvemobile receiver compatibilityVSAvoidreceiving performance in mobile environment

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent implements dynamic adaptive equalization that continuously adjusts equalization parameters based on real-time channel conditions estimated from pilot signals. This dynamic adaptation allows the system to track and compensate for rapidly changing mobile channels, maintaining reliable reception in portable and mobile environments

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent employs feedback mechanisms where the receiver estimates channel conditions using pilot sequences and feeds this information back to adjust equalization parameters and decoding thresholds. This feedback loop enables the system to adapt to mobile channel variations, improving receiving performance while maintaining compatibility with mobile receivers

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS7965778B2Digital broadcasting system and method of processing data in digital broadcasting system

Publication Date: 2011.06.21 LG ELECTRONICS INC

AI summary

A digital broadcasting system and a data processing method are disclosed. A receiving system of the digital broadcasting system includes a receiving unit, an SI handler, and a decoding unit. The receiving unit receives broadcast signals including mobile service data and main service data. Herein, the mobile service data may configure a data group, and the data group may include a signaling information region in some of a plurality of data regions. Also, the signaling information region may include TPC signaling data and FIC signaling data. The SI handler acquires channel configuration information of the mobile service data from the broadcast signal using pre-decided IP access information, and extracts encoding format information for each IP stream component within a corresponding virtual channel service RTP-packetized and received from the acquired channel configuration information. The decoding unit decodes the mobile service data of the corresponding IP stream component based upon the extracted encoding format information.