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Method and device for automatic gain adjustment in wireless receiver

An automatic gain adjustment and wireless receiver technology, which is applied in the field of communication networks, can solve the problems of not being able to ensure that the radio frequency, analog devices, and nodes in the digital domain are not saturated at the same time, reducing the dynamic range of received signal power, and having no intersection, etc.

Active Publication Date: 2013-06-05
HONOR DEVICE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, in solution one of the prior art, the use of wideband RSSI can only ensure that the radio frequency, analog devices, and nodes in the digital domain are not saturated; in solution two, the use of narrowband RSSI can only ensure that the useful signal power is adjusted to a certain power level to reduce the dynamic range of received signal power; in scheme three, wideband RSSI and narrowband RSSI are used at the same time, when the signal interference is strong, the acceptable AGC gain range and the unsaturated AGC that may be calculated There is no intersection between the gain intervals, and the AGC gain that can be used in the next cycle cannot be determined
[0010] Therefore, the above three schemes in the prior art cannot simultaneously ensure that the radio frequency, analog devices, and nodes in the digital domain are not saturated and adjust the useful signal power to a certain power level when obtaining the AGC gain used in the next cycle

Method used

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  • Method and device for automatic gain adjustment in wireless receiver
  • Method and device for automatic gain adjustment in wireless receiver
  • Method and device for automatic gain adjustment in wireless receiver

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Embodiment 1

[0032] An embodiment of the present invention provides a method for automatic gain adjustment in a wireless receiver, such as figure 1 As shown, the method includes:

[0033] Step 101, subtracting the total signal power of the air interface from the preset first target power to obtain the analog domain gain control AAGC gain;

[0034] Step 102, subtracting the second target power from the digital baseband interference signal power to obtain the digital domain gain control DAGC gain;

[0035] Step 103, performing analog domain processing and analog-to-digital conversion on the analog domain signal of the wireless receiver to obtain a digital domain signal, in the analog domain processing, using the AAGC gain to perform gain control on the analog domain signal;

[0036] Step 104: Perform digital domain processing on the digital domain signal to obtain a processing result. In the digital domain processing, use the DAGC gain to perform gain control on the digital domain signal. ...

Embodiment 2

[0044] The embodiment of the present invention provides a method for automatic gain adjustment in a wireless receiver. It should be noted that the embodiment of the present invention introduces DAGC (Digital Auto Gain Control, digital domain gain control) in the digital time domain, and the function of the original AGC It can be implemented by AAGC (Analog Auto Gain Control, analog domain gain control) and the DAGC.

[0045] like image 3 In the receiver architecture diagram shown, after the antenna receives the signal, the signal is amplified and processed by the RF (Radio frequency) amplifier / RF filter (Radio frequency filter, radio frequency filter) module, and the processed analog signal After the analog-to-digital conversion ADC is converted into a digital signal, the signal power of the current wideband RSSI (WB-RSSI) is counted, and the digital signal after the direct current (DC) is eliminated is processed by a baseband filter (BB filter). At this time, the current nar...

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Abstract

The present invention relates to the field of communication technologies and discloses a method and an apparatus for auto gain control (AGC) in a radio receiver, which can ensure that a radio frequency device, an analog device, and various nodes in a digital domain are non-saturated and that useful signal power is adjusted to a certain power level. According to the present invention, total signal power on an air interface is subtracted from a preset first target power to obtain an analog auto gain control (AAGC) gain, and then a second target power is subtracted from an interference signal power in a digital baseband to obtain a digital auto gain control (DAGC) gain.

Description

technical field [0001] The invention relates to the technical field of communication networks, in particular to a method and device for automatic gain adjustment in a wireless receiver. Background technique [0002] During the communication process, the power of the signal often changes with time due to factors such as channel fading, load size, and power control. Therefore, the communication receiver is required to have a certain receiving range to ensure that the signal can be received correctly. AGC (Auto Gain Control, Automatic Gain Adjustment) can keep the received signal power within a stable range, and generate appropriate amplification gain by predicting the signal power in a period of time in the future, so that ADC (Analog Digital Converter, analog-to-digital converter) The ingress or digital domain signal is stabilized at a substantially fixed or less dynamic range power level. When obtaining the AGC gain used in the next cycle, two functions need to be guarantee...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/16H03G3/20
CPCH03G3/20H04W52/52H04W52/243H04W52/04
Inventor 秦健华陈俊仕曾云宝
Owner HONOR DEVICE CO LTD