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An automatic gain control system and method

A technology of automatic gain control and dynamic gain, applied in gain control, transmission system, amplification control and other directions, can solve the problems of unstable system performance, saturation or too low of individual chips, avoid saturation or too low, improve The effect of system performance

Inactive Publication Date: 2005-07-06
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is to provide an automatic gain control method to solve the problems in the prior art that individual chips are saturated or too low and the system performance is unstable

Method used

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  • An automatic gain control system and method
  • An automatic gain control system and method
  • An automatic gain control system and method

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Embodiment Construction

[0036] figure 1 Shown is the sliding window design schematic, figure 2 Shown is a block diagram of the position of the sliding window AGC of the present invention in the system. The present invention proposes a new AGC algorithm, which adopts the sliding window technology to perform real-time AGC adjustments for each chip in each burst, so that the received signal is basically kept within the required range. In addition, in order to avoid In order to meet the requirements of measurement and calculation later, the receiving data is divided and designed, and the realization block diagram is shown in figure 2 .

[0037] The use of this sliding window AGC effectively improves the system performance and avoids the occurrence of abnormal saturation and division by zero. At the same time, due to the shunt design, it has no impact on the measurement calculation.

[0038] refer to figure 1 As shown, the scheme of segmented sliding window is adopted for data statistics average to ...

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Abstract

This invention discloses an automatic gain control method for dynamically gain adjusting of receiver in digital communication system, which is characteristic of that extracting train sequence code from received signal and separating data part, making real time automatic gain control by sectional slice window type to outburst code piece of data part. Said invention avoids the saturation and over low in individual code piece and effectively raises system performance.

Description

technical field [0001] The invention relates to the field of digital mobile communication, in particular to an automatic gain control method of a time-division synchronous code division multiple access system under the condition of relatively large fading variation. Background technique [0002] Due to the time-varying wireless channel and the influence of many other factors, the instantaneous energy of the received signal of the receiver is extremely unbalanced. If the wireless received signal is regarded as a random process, the non-stationary signal of the random process has a large dynamic range, and it is much more difficult to deal with this kind of signal than the stationary signal. But in a short period of time, the received signal is approximately a stationary signal, that is, it can be regarded as a stationary signal in a relatively short period of time, but it has different energies in different periods of time. Although the signal energy changes in different tim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03G3/20H04B1/10
Inventor 刘虎李颖郭俊峰
Owner ZTE CORP