OFDM Broadcast Transmitter for LTE Terminal Reception

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Solution Overview

Problem

Current communication systems lack a cost-effective and bandwidth-efficient solution for distributing Over-the-top content using LTE terminals, which cannot simultaneously receive mobile radio and broadcast digital radio/TV content.

Innovation Solution

Modifying the physical layer of broadcast standards like DTTB and DTRB to generate signals recognizable by LTE terminals, allowing a single receiver to detect and adapt between mobile radio and broadcast signals through Data Link Layer conversion and Network Layer encapsulation, enabling the reception of both mobile radio and broadcast content.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If broadcast standards use traditional OFDM physical layer, then broadcast transmission is efficient and robust, but LTE terminals cannot recognize and receive the signal

Engineering Contradiction:

Improvecompatibility with LTE terminalsVSAvoidsignal recognition by LTE terminals

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent modifies physical layer parameters including cyclic prefix length, subcarrier spacing, and frame structure to match LTE standards while maintaining broadcast functionality, enabling LTE terminals to recognize and process broadcast signals

Inventive Principle:

Principle #35Parameter changes

2Reliability

If separate receiver arrangements are used for mobile radio and broadcast content, then reception reliability is ensured, but device complexity and cost increase

Engineering Contradiction:

Improvereception capabilityVSAvoidnumber of receiver arrangements

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent designs a universal receiver architecture that can process both mobile radio and broadcast signals through a single OFDM demodulator and protocol stack, eliminating the need for separate receiver hardware while maintaining reception reliability for both content types

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If LTE terminals are used for broadcast distribution, then mobile internet compatibility is achieved, but bandwidth efficiency and cost-effectiveness are insufficient

Engineering Contradiction:

Improvemobile internet compatibilityVSAvoidbandwidth efficiency

Core Design Contradiction:

Adaptability or versatilityVSLoss of energy

Solution Approach 1:

The patent segments the transmission into control information and data payload with efficient channel coding and modulation schemes optimized for broadcast scenarios, achieving bandwidth efficiency comparable to traditional broadcast standards while maintaining LTE compatibility

Inventive Principle:

Principle #1Segmentation

Data Source

PatentEP3078205B1OFDM based broadcast communication system

Publication Date: 2019.01.30 INST FUER RUNDFUNKTECHNIK GMBH

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AI summary

OFDM based broadcast transmitter arrangement for transmitting a digital audio/video information signal, wherein an encoded version of the digital audio/video information signal is encapsulated in a network layer encapsulation step in accordance with DAB, DVB-T or DVB-T2 to obtain a network layer information signal. The network layer information signal is then converted in a Data Link Layer conversion step to obtain a Data Link Layer information signal, which is subjected in a Physical Layer conversion step to obtain a broadcast information transmission signal.