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Transceiving unit, and automatic gain control method and device of wireless receiving system

A technology of automatic gain control and wireless reception, applied in wireless communication, electrical components, power management and other directions, can solve the problems of large processing delay, inability to take gain attenuation in time, difficult automatic gain control, etc., and achieve the effect of satisfying blocking

Inactive Publication Date: 2011-10-12
NANTONG QIWU AGRI PROD CO LTD
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Problems solved by technology

This patent is simple to implement and low in cost, but due to the power detection control in the baseband part, the processing delay is too large, it is difficult to realize real-time automatic gain control, and there is a large signal in the current time slot, and the gain attenuation measures cannot be taken in time

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  • Transceiving unit, and automatic gain control method and device of wireless receiving system
  • Transceiving unit, and automatic gain control method and device of wireless receiving system
  • Transceiving unit, and automatic gain control method and device of wireless receiving system

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Embodiment Construction

[0040] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0041] figure 1 It is a flowchart of the automatic gain control method of the wireless receiving system of the present invention. As shown in the figure, the automatic gain control method of the wireless receiving system of the present invention specifically includes the following steps:

[0042] Step 1. Perform power detection on the digital intermediate frequency signal, which can be real-time signal power or real-time signal amplitude;

[0043] Step 2. According to the value obtained by the power detection module, the judgment condition of the AGC control is completed.

[0044] The judgment conditions of AGC control are as follows: figure 2 As shown in FIG. 1 , several time points are taken to detect the power of the digital intermediate frequency signal during the ramp-up region T1 of the time slot head, and then saturation sta...

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Abstract

The invention discloses an automatic gain control method of a wireless receiving system, including the following steps of: A, determining whether the received signal of current time slot is in a saturated state at the beginning of the time slot, if so, then executing a step B, otherwise, directly executing a step C; B, reducing the gain of a receiving channel at the beginning of the time slot so as to make the current time slot in an unsaturated state, then executing the step C; C, controlling the gain of the receiving channel based on predetermined conditions according to the received signal strength of the current time slot in a non-ramp region. The method of the invention can ensure unsaturation of the receiving channel while a large signal is input and realize real time automatic gain control. The invention further provides a corresponding automatic gain control device of the wireless receiving system, and a transceiving unit using the same. The invention is suitable for the automatic gain control of a multi-carrier GSM(Global System For Mobile Communication) system particularly, and has wide industry application prospect.

Description

technical field [0001] The invention belongs to the technical field of wireless access of mobile communication systems, and relates to a transceiver unit, a wireless receiving system, especially a multi-carrier automatic gain control method and device. Background technique [0002] In the field of wireless communication, due to the difference in the transmit power and path loss of the terminal, the strength of the signal received by the base station is different. In addition, when the position of the terminal moves, the strength of the signal received by the base station will also change. If the signal received by the base station is too strong, it may exceed the linear amplification range of the RF receiver; and when the signal received by the base station is weak, it may not be able to recover the useful signal, which requires the RF receiver of the base station to have a larger dynamic range and receiver sensitivity. Therefore, an automatic gain control (Automatic Gain ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/24H04W52/36H04W52/52
Inventor 刘玉芬
Owner NANTONG QIWU AGRI PROD CO LTD
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