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Method and apparatus for determining characteristics of components of a communication channel under load

A communication channel and component technology, which is applied in the communication between multiple stations, electrical components, transmission monitoring, etc., can solve problems such as inability to test components, and achieve the effect of increasing availability

Inactive Publication Date: 2007-07-18
SOC EUROPEENE DES SATELLITES SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some cases, it is not possible to interrupt communications over communication channels, so components of these channels cannot be tested after entry into operation

Method used

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  • Method and apparatus for determining characteristics of components of a communication channel under load
  • Method and apparatus for determining characteristics of components of a communication channel under load
  • Method and apparatus for determining characteristics of components of a communication channel under load

Examples

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Embodiment Construction

[0038] For purposes of describing one embodiment of the invention, Figure 1 shows components of a transponder in a communication satellite as an example of a communication channel.

[0039] The transponder of the communication satellite includes a receiving antenna 1 for receiving an uplink signal transmitted from a ground station (not shown). The output signal of the receiving antenna 1 is fed to an input demultiplexer (IMUX) 3 after frequency conversion in a frequency converter 2 . The input demultiplexer 3 comprises several first filters 4-1 to 4-n for separating individual signals from the signals from the antennas. A filter is generally provided for each signal to be separated from other signals received via the receive antenna 1, which filter corresponds to a communication channel. The n output signals of the input demultiplexer 3 are fed to a corresponding number of high power amplifiers 5-1 to 5-n, in each high power amplifier a traveling wave tube (TWT) is used to am...

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PUM

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Abstract

For determining characteristics of components of a communication channel, for example of a transponder in a communication satellite, a clean carrier signal f(t) is modulated with a pseudo noise signal PN(t) and transmitted through the communication channel at a level below the level of a payload signal which is transmitted via the communication channel simultaneously. The received signal s'(t) is correlated with same pseudo noise signal PN(t) to obtain a recovered carrier signal f'(t). Both the clean carrier signal f(t) and the recovered carrier signal f'(t) can be used to determine the desired characteristics. Since the PN modulated clean carrier signal s(t) is transmitted at a low level, it is possible to perform measurements without switching off the payload signal.

Description

[0001] This case is a divisional application for invention with the application number 98813435.7, the filing date is December 17, 1998, and the title is "Method and Device for Determining Component Characteristics of a Communication Channel Under Underload". technical field [0002] The invention relates to a method and a device for determining the characteristics of components of a communication channel, in particular transponders in a communication satellite under load. Background technique [0003] The characteristics of the communication channels may change during the life of the equipment used. Various tests are performed not only initially but repeatedly during the lifetime to confirm that the communication channel meets predetermined specifications. Typically, these tests are performed without normal traffic, ie the communication channel is not used to transmit a communication signal. This solution will be described in more detail below with reference to a communica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/185H04B17/00H04B7/26H04B17/40
CPCH04B17/0042H04B7/18519H04B17/309H04B7/18513H04B7/185
Inventor 格哈德·贝特沙伊德居伊·阿勒
Owner SOC EUROPEENE DES SATELLITES SA
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