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Rducing effects of self-created interference on boardband reception

A technology of wideband reception and wideband receiver, applied in radio transmission systems, digital transmission systems, electrical components, etc., and can solve problems such as less usefulness

Inactive Publication Date: 2004-07-21
NOKIA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in wideband systems (such as DVB-T systems with a total used bandwidth of about 400MHz, specifically, a bandwidth of 474MHz-858MHz), this design process is less useful due to the wide bandwidth used

Method used

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  • Rducing effects of self-created interference on boardband reception
  • Rducing effects of self-created interference on boardband reception
  • Rducing effects of self-created interference on boardband reception

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Embodiment Construction

[0043] figure 2 A DVB-T receiver 200 according to a preferred embodiment of the present invention is shown. The DVB-T receiver 200 is located in a mobile communication device, forming a portable handheld device suitable for DVB-T operation. In addition to the DVB-T reception capability, the mobile communication device also has the capability of the cellular network, so as to realize the interactive communication with the cellular network (such as the cellular telephone network). This device may be called a media terminal or a media display.

[0044] The DVB-T receiver 200 generally operates according to the well-known superheterodyne principle. In a preferred embodiment of the present invention, the digital data is COFDM modulated into an analog radio frequency DVB-T signal, and sent from the DVB-T transmitter, and then received by the integrated antenna (not shown) of the DVB-T receiver 200, Then it is transmitted to the low noise amplifier 101 of the DVB-T receiver 200 ....

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Abstract

The invention relates to a method for reducing effects of self-created digital radio frequency interference on broadband reception. In the method a DVB-T (Digital Video Broadcasting-Terrestrial) signal is received at a broadband receiver (200). The received signal is demodulated in a demodulation process. Information (210) on frequencies of self-created digital radio frequency interference is provided for the broadband reception. The information has been generated based on prior measurements and stored to a memory prior to the receiving of the DVB-T signal. The information is used in the broadband reception so as to reduce the effects of the self-created digital radio frequency interference on the broadband reception.

Description

technical field [0001] The present invention relates to reducing the effects of digital interference in broadband reception. The present invention is particularly, but not exclusively, concerned with reducing such effects in portable / mobile broadband receivers. Background technique [0002] A digital broadcasting system such as a digital television system is still under development, and it is expected that such a system will gradually replace the analog broadcasting system. The main reason is that this system can provide new types of services and higher quality of service compared with the analog broadcasting system. [0003] One of the digital broadcasting systems currently being standardized by the European Telecommunications Standards Institute (ETSI) is the Digital Video Broadcasting (DVB) system. In the DVB system, digital video is broadcast using satellite, cable and / or terrestrial facilities. [0004] A DVB system using terrestrial facilities is defined as a DVB-T ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04BH04B1/10H04B7/00H04L27/26
CPCH04L27/2647
Inventor 托米·奥兰宁
Owner NOKIA CORP