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Channel analog instrument and method

A channel simulation and instrument technology, applied in the field of channel simulation instruments and channel simulation

Active Publication Date: 2010-09-29
WANBAO ELECTRONICS NANTONG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The purpose of the present invention is to solve the problem that the existing channel analog instruments can handle a small range of input signal levels, so that the channel analog instruments can handle larger input signal levels range to adapt to more channel simulation test environments

Method used

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Embodiment Construction

[0043] The specific implementation manners of the present invention will be described below in conjunction with the accompanying drawings.

[0044] We have seen that channel simulation in some test environments needs to support input signals that can handle a large signal level range, such as a level range greater than 60dB. At the same time, the signal level may change relatively quickly, so the input signal level Adaptation cannot be solved by expanding the input signal level range by fixedly setting the input range. It is necessary to deal with rapid input signal changes in a large level range.

[0045] Such as figure 2 Shown is the structural representation of the channel simulation instrument of the present invention, as can be seen from the figure, compared with the traditional method, the present invention has increased four functional units: PD (power detection) unit, VGA1, VGA2 and VGA control unit.

[0046] PD: It is a power detector, which detects the power of the...

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Abstract

A channel simulating instrument is composed of gain-variable control unit, power detecting unit, and the 1st and the 2nd gain-variable amplifier units. Its method includes such steps as detecting the power of input signal, the 1st gain treating to input signal, and the 2nd gain treating.

Description

technical field [0001] The invention relates to the communication field, in particular to a channel simulation instrument and a channel simulation method. technical background [0002] The transmission channel of the signal in the communication system is often not ideal. There are different transmission channels in different communication systems. For example, when transmitting in wireless space, the scene of signal propagation is very different. It will be affected by atmospheric effects and ground effects, causing the level received by the receiver to fluctuate with time. We call this phenomenon fading. The size of the fading is related to the weather conditions and the length of the station distance. Declines have been of varying lengths and degrees. Some fading durations are very short, only a few seconds, called fast fading; some fading durations are very long, several minutes or even hours are called slow fading. The occurrence of fading will distort the signal. W...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/00H04B17/391
Inventor 李挺钊
Owner WANBAO ELECTRONICS NANTONG