WO2016058375A1

WO2016058375A1 - Method and device for gain adjustment

Info

Publication number: WO2016058375A1
Application number: PCT/CN2015/078891
Authority: WO
Inventors: 宋连坡; 李刚; 魏元庆
Original assignee: 中兴通讯股份有限公司
Priority date: 2014-10-17
Filing date: 2015-05-13
Publication date: 2016-04-21
Also published as: JP2017529805A; JP6426281B2; CN105517138A

Abstract

A method and device for gain adjustment, comprising: with regard to each channel, calculating a difference value between a channel rated full power and a channel configuration power; adjusting a target baseband gain and a target radio frequency gain according to the difference value obtained by calculation; and adjusting a current baseband gain into the target baseband gain, and adjusting a current radio frequency gain into the target radio frequency gain.

Description

Method and device for adjusting gain

Technical field

This document relates to Long Term Evolution (LTE) technology, especially a method and device for adjusting gain.

Background technique

In an LTE system (including a Time Division Duplexing (TDD) mode and a Frequency Division Duplexing (FDD) mode, an eNodeB (Evolved Node B, ie, an LTE base station) belongs to a radio access part. The transmit power of the eNodeB cell determines the coverage of the base station. In order to solve the problem of covering or avoiding interference, there are some requirements for actively or automatically adjusting the power of the eNodeB cell.

In an LTE system, an eNodeB includes a baseband module and a radio frequency module. When the service is full, the power of the RF antenna port is the same as the power of the cell configuration. The actual transmit power of the cell in the LTE system is calculated according to the frame structure of the radio frame. Each radio frame length of the LTE system is 10 milliseconds (ms), and each subframe has a length of 1 ms. There are 10 subframes for FDD mode that can be used for downlink transmission. For the downlink subframes corresponding to the different uplink and downlink subframe switching point configurations in the TDD mode, the subframes 0 and 5 are fixed as the downlink subframes. The actual transmit power of the current cell can be obtained by reading the IQ value of the downlink subframe.

Related art methods for adjusting gain generally include:

The calibration source sends a test signal to the RF module to determine the current RF gain as the difference between the power of the received test signal and the scaled source power, if the difference between the current RF gain and the target RF gain is greater than or equal to the preset. When the value is set, the current RF gain is adjusted to the target RF gain; if the difference between the current RF gain and the target RF gain is less than the preset value, the current RF gain is kept unchanged. Based on the adjusted RF gain, the baseband gain decreases as the cell configuration power decreases.

Wherein, the calibration source may be a constant power baseband calibration source or a constant power calibration source constructed by the RF module; the target RF gain is determined by the manufacturer of the RF module.

In the method for adjusting the gain of the related art, due to the RF gain and the cell configuration function during the adjustment process The rate is irrelevant, and the baseband module indicates that the bit width of the data is limited, that is, the range of the baseband gain is limited. If the cell configuration power is reduced, the baseband gain is reduced, and when the baseband gain is reduced to a certain extent. The accuracy of the baseband signal will also decrease, and the quality of the signal emitted by the radio will decrease. Therefore, the cell configuration power cannot be set very low, that is, the cell configuration power range is reduced.

Summary of the invention

This paper proposes a method and device for adjusting the gain, which can expand the power range of the cell configuration.

A method of adjusting gain, including:

For each channel, calculate the difference between the channel rated full power and the channel configuration power;

Adjusting the target baseband gain and the target RF gain according to the calculated difference;

The current baseband gain is adjusted to the target baseband gain, and the current RF gain is adjusted to the target RF gain.

Optionally, the adjusting the target baseband gain and the target RF gain according to the calculated difference includes:

Determining that the calculated difference is less than or equal to a difference between a maximum value of the baseband gain and a minimum value of the baseband gain, adjusting the target baseband gain to be y1, and adjusting the target RF gain to be C ;

Where y1=Pc-M-N-C;

Wherein Pc is the power of the channel, and M is the corresponding radio frequency power when the baseband signal power is 0 full degree relative level dBFS, N is the maximum power of the baseband signal, and C is the maximum value of the radio frequency gain.

Optionally, when it is determined that the calculated difference is greater than a difference between a maximum value of the baseband gain and a minimum value of the baseband gain, the calculated difference is adjusted according to a calculated baseband gain and The target RF gain also includes:

Adjusting the target baseband gain to A, and adjusting the target RF gain to be y2;

Where y2=Pc-M-N-A;

Where A is the minimum value of the baseband gain.

Determining that the calculated difference is less than or equal to a difference between a maximum value of the radio frequency gain and a minimum value of the radio frequency gain, adjusting the target baseband gain to D, and adjusting the target radio frequency gain to be y3 ;

Where y3=Pc-M-N-D;

Where D is the maximum value of the baseband gain, Pc is the channel configuration power, and M is the corresponding radio frequency power when the baseband signal power is 0 full degree relative level dBFS, and N is the maximum power of the baseband signal.

Optionally, when it is determined that the calculated difference is greater than a difference between a maximum value of the radio frequency gain and a minimum value of the radio frequency gain, the calculated difference is adjusted according to a calculated baseband gain and The target RF gain also includes:

Adjusting the target RF gain to B, and adjusting the target baseband gain to be y4;

Where y4=Pc-M-N-B;

Where B is the minimum value of the RF gain.

Optionally, the adjusting the current RF gain to the target RF gain comprises:

Calculating the current RF gain according to the power of the downlink subframe of the baseband signal at the same position and the downlink subframe of the antenna feed signal, and determining that the absolute value of the difference between the calculated current RF gain and the target RF gain is less than or equal to the pre-predetermined value Set the value to keep the current RF gain unchanged.

Optionally, when it is determined that the absolute value of the difference between the calculated current RF gain and the target RF gain is greater than a preset value, the adjusting the current RF gain to the target RF gain further includes:

The current RF gain is adjusted to a target RF gain.

A device for adjusting gain, comprising:

The service module is configured to: calculate, for each channel, a difference between the channel rated full power and the channel configuration power; and adjust the target baseband gain and the target RF gain according to the calculated difference;

The baseband module is configured to: adjust the current baseband gain to the target baseband gain;

The RF module is set to adjust the current RF gain to the target RF gain.

Optionally, the service module is set to:

For each channel, calculating a difference between the channel rated full power and the channel configuration power; determining that the calculated difference is less than or equal to the maximum value of the baseband gain and the minimum value of the baseband gain a difference, adjusting the target baseband gain to be y1, and adjusting the target RF gain to be C;

Where y1=Pc-M-N-C;

Optionally, the service module is set to:

Determining that the calculated difference is greater than a difference between the maximum value of the baseband gain and the minimum value of the baseband gain, adjusting the target baseband gain to A, and adjusting the target RF gain to be y2;

Where y2=Pc-M-N-A;

Where A is the minimum value of the baseband gain.

Optionally, the service module is set to:

Where y3=Pc-M-N-D;

Optionally, the service module is set to:

Determining that the calculated difference is greater than a difference between a maximum value of the RF gain and a minimum value of the RF gain, adjusting the target RF gain to B, and adjusting the target baseband gain For y4;

Where y4=Pc-M-N-B;

Where B is the minimum value of the RF gain.

Optionally, the radio frequency module is configured to:

It is determined that the calculated absolute value of the difference between the current RF gain and the target RF gain is greater than a preset value, and the current RF gain is adjusted to the target RF gain.

Through the solution in this paper, the current baseband gain and the current RF gain are simultaneously adjusted according to the difference between the channel rated full power and the channel configuration power, thereby expanding the cell configuration power.

Further, the current RF gain is calculated according to the power of the downlink subframe of the baseband signal and the downlink subframe of the antenna feed signal at the same location, and the reliability of the calculated current RF gain is guaranteed.

BRIEF abstract

1 is a flowchart of a method for adjusting a gain according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a device for adjusting gain according to an embodiment of the present invention.

Embodiments of the invention

Embodiments of the present invention will be described below with reference to the accompanying drawings. It should be noted that the embodiments in the embodiments and the various manners in the embodiments may be combined with each other without conflict.

Referring to FIG. 1, an embodiment of the present invention provides a method for adjusting a gain, including:

Step 100: Calculate the difference between the channel rated full power and the channel configuration power for each channel.

In this step, the channel configuration power = cell configuration power -10 lg (channel number).

For example, when the channel rated full power is 37dBm and the channel configuration power is 10dBm, it is calculated. The difference is 27dBm.

Step 101: Adjust a target baseband gain and a target RF gain according to the calculated difference.

In this step, adjusting the target baseband gain and the target RF gain according to the calculated difference includes:

Determining that the calculated difference is less than or equal to the difference between the maximum value D of the baseband gain and the minimum value A of the baseband gain, adjusting the target baseband gain to be y1, and adjusting the target RF gain to be C; wherein, y1=Pc-MNC Pc is the channel configuration power, M is the corresponding RF power when the baseband signal power is 0 full scale relative level (dBFS, dB Full Scale), N is the maximum power of the baseband signal, and C is the maximum value of the RF gain.

It is determined that the calculated difference is greater than the difference between the maximum value D of the baseband gain and the minimum value A of the baseband gain, the target baseband gain is adjusted to A, and the adjusted target RF gain is y2; wherein y2=Pc-MNA; Is the minimum value of the baseband gain.

For example, when A is -10dB, D is 0dB, Pc is 30dBm, M is 0dBm, N is -13dBFS, and C is 50dB, the calculated difference (7dBm) is less than (DA) difference (10dB). Adjust the target baseband gain to Pc-MNC=30dBm-0dBm-(-13dBFS)-50dB=-7dB, and adjust the target RF gain to 50dB.

When the Pc is 20dBm, the calculated difference (17dB) is greater than (DA) (10dBm), then the target baseband gain is adjusted to -10dB, and the adjusted target RF gain is Pc-MNA=20dBm-0dBm-(-13dBFS)-( -10dBm) = 43dB.

Alternatively, adjusting the target baseband gain and the target RF gain based on the calculated difference includes:

Determining that the calculated difference is less than or equal to the difference between the maximum value C of the RF gain and the minimum value B of the RF gain, adjusting the target baseband gain to D, and adjusting the target RF gain to be y3; wherein, y3=Pc-MND .

It is determined that the calculated difference is greater than the difference between the maximum value C of the RF gain and the minimum value B of the RF gain, the target RF gain is adjusted to B, and the target baseband gain is adjusted to y4; wherein y4=Pc-MNB; Is the minimum value of the RF gain.

For example, when Pc is 10dBm and B is 20dB, the calculated difference (27dB) is less than (CB) (30dB), then the target baseband gain is adjusted to 0dB, and the target RF gain is adjusted to Pc-MND=10dBm-0dBm-( -13dBFS) - 0dB = 23dB.

When the Pc is 6dBm, the calculated difference (31dB) is greater than (CB) (30dB), then the target RF gain is adjusted to 20dB, and the target baseband gain is adjusted to Pc-MNB=6dBm-0dBm-(-13dBFS)-20dB= -1dB.

Step 102: Adjust the current baseband gain to the target baseband gain, and adjust the current RF gain to the target RF gain.

In this step, the current RF gain can be periodically adjusted to the target RF gain.

In this step, adjusting the current RF gain to the target RF gain includes:

Calculating the current RF gain according to the power of the downlink subframe of the baseband signal at the same position and the downlink subframe of the antenna feed signal, and determining that the absolute value of the difference between the calculated current RF gain and the target RF gain is less than or equal to the pre-predetermined value Set the value to keep the current RF gain unchanged. Determine the absolute value of the difference between the calculated current RF gain and the target RF gain is greater than the preset value, and adjust the current RF gain to the target RF gain.

The current RF gain is the difference between the power of the downlink subframe of the antenna feed signal minus the sum of the power of the downlink subframe of the baseband signal and the sum of M.

The downlink subframe of the baseband signal may be one or more, and the downlink subframe of the antenna signal may be one or more. When there are multiple, the power of the downlink subframe of the baseband signal is the subframe of each downlink subframe. The average of the power, the power of the downlink subframe of the antenna feed signal is the average of the power of each downlink subframe.

Among them, the preset value can be 0.2 decibels (dB).

Referring to FIG. 2, an embodiment of the present invention further provides an apparatus for adjusting a gain, including at least:

The service module 21 is configured to: calculate, for each channel, a difference between the channel rated full power and the channel configuration power; and adjust the target baseband gain and the target RF gain according to the calculated difference;

The baseband module 22 is configured to: adjust the current baseband gain to a target baseband gain;

The RF module 23 is configured to adjust the current RF gain to the target RF gain.

In the apparatus of the embodiment of the present invention, the service module 21 is configured to:

For each channel, calculate the difference between the channel rated full power and the channel configuration power; determine that the calculated difference is less than or equal to the baseband gain and the baseband gain minimum The difference between the target baseband gain is y1, and the target RF gain is adjusted to C;

Where y1=Pc-M-N-C;

Wherein, Pc is the channel configuration power, M is the baseband signal power is 0 corresponding to the level of the full-band RFFS, N is the maximum power of the baseband signal, and C is the maximum value of the RF gain.

Determining that the calculated difference is greater than the difference between the maximum value of the baseband gain and the minimum value of the baseband gain, adjusting the target baseband gain to be A, and adjusting the target RF gain to be y2;

Where y2=Pc-M-N-A;

Where A is the minimum value of the baseband gain.

Determining that the calculated difference is less than or equal to the difference between the maximum value of the RF gain and the minimum value of the RF gain, adjusting the target baseband gain to D, and adjusting the target RF gain to be y3;

Where y3=Pc-M-N-D;

Where D is the maximum value of the baseband gain, Pc is the channel configuration power, M is the corresponding RF power when the baseband signal power is 0 full scale relative level dBFS, and N is the maximum power of the baseband signal.

Determining that the calculated difference is greater than the difference between the maximum value of the RF gain and the minimum value of the RF gain, adjusting the target RF gain to be B, and adjusting the baseband RF gain to be y4;

Where y4=Pc-M-N-B;

Where B is the minimum value of the RF gain.

In the apparatus of the embodiment of the present invention, the radio frequency module 23 is configured to:

Calculating the current RF gain according to the power of the downlink subframe of the baseband signal at the same position and the downlink subframe of the antenna feed signal, and determining that the absolute value of the difference between the calculated current RF gain and the target RF gain is less than or equal to the pre-predetermined value Set the value to keep the current RF gain constant.

In the device of the embodiment of the invention, the radio frequency module is set to:

Judging that the calculated absolute value of the difference between the current RF gain and the target RF gain is large At the preset value, the current RF gain is adjusted to the target RF gain.

One of ordinary skill in the art will appreciate that all or a portion of the steps of the above-described embodiments can be implemented using a computer program flow, which can be stored in a computer readable storage medium, such as on a corresponding hardware platform (eg, The system, device, device, device, etc. are executed, and when executed, include one or a combination of the steps of the method embodiments.

Alternatively, all or part of the steps of the above embodiments may also be implemented by using an integrated circuit. These steps may be separately fabricated into individual integrated circuit modules, or multiple modules or steps may be fabricated into a single integrated circuit module. achieve.

The devices/function modules/functional units in the above embodiments may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices.

When the device/function module/functional unit in the above embodiment is implemented in the form of a software function module and sold or used as a stand-alone product, it can be stored in a computer readable storage medium. The above mentioned computer readable storage medium may be a read only memory, a magnetic disk or an optical disk or the like.

Industrial applicability

Through the solution in this paper, the current baseband gain and the current RF gain are simultaneously adjusted according to the difference between the channel rated full power and the channel configuration power, thereby expanding the cell configuration power. In addition, the current RF gain is calculated according to the power of the downlink subframe of the baseband signal and the downlink subframe of the antenna signal, and the reliability of the calculated current RF gain is guaranteed.

Claims

A method of adjusting gain, including:

For each channel, calculate the difference between the channel rated full power and the channel configuration power;

Adjusting the target baseband gain and the target RF gain according to the calculated difference;

The current baseband gain is adjusted to the target baseband gain, and the current RF gain is adjusted to the target RF gain.
The method of claim 1 wherein said adjusting the target baseband gain and the target RF gain based on the calculated difference comprises:

Determining that the calculated difference is less than or equal to a difference between a maximum value of the baseband gain and a minimum value of the baseband gain, adjusting the target baseband gain to be y1, and adjusting the target RF gain to be C ;

Where y1=Pc-M-N-C;

Wherein Pc is the power of the channel, and M is the corresponding radio frequency power when the baseband signal power is 0 full degree relative level dBFS, N is the maximum power of the baseband signal, and C is the maximum value of the radio frequency gain.
The method according to claim 2, wherein when it is judged that the calculated difference is greater than a difference between a maximum value of the baseband gain and a minimum value of the baseband gain, the calculation is based on The difference adjustment target baseband gain and target RF gain also include:

Adjusting the target baseband gain to A, and adjusting the target RF gain to be y2;

Where y2=Pc-M-N-A;

Where A is the minimum value of the baseband gain.
The method of claim 1 wherein said adjusting the target baseband gain and the target RF gain based on the calculated difference comprises:

Determining that the calculated difference is less than or equal to a difference between a maximum value of the radio frequency gain and a minimum value of the radio frequency gain, adjusting the target baseband gain to D, and adjusting the target radio frequency gain to be y3 ;

Where y3=Pc-M-N-D;

Where D is the maximum value of the baseband gain, Pc is the channel configuration power, and M is the corresponding radio frequency power when the baseband signal power is 0 full degree relative level dBFS, and N is the maximum power of the baseband signal.
The method according to claim 4, wherein when it is determined that the calculated difference is greater than a difference between a maximum value of the radio frequency gain and a minimum value of the radio frequency gain, the calculated The difference adjustment target baseband gain and target RF gain also include:

Adjusting the target RF gain to B, and adjusting the target baseband gain to be y4;

Where y4=Pc-M-N-B;

Where B is the minimum value of the RF gain.
The method of claim 1 wherein said adjusting the current RF gain to the target RF gain comprises:

Calculating the current RF gain according to the power of the downlink subframe of the baseband signal at the same position and the downlink subframe of the antenna feed signal, and determining that the absolute value of the difference between the calculated current RF gain and the target RF gain is less than or equal to the pre-predetermined value Set the value to keep the current RF gain unchanged.
The method according to claim 6, wherein when it is determined that the absolute value of the difference between the calculated current RF gain and the target RF gain is greater than a preset value, the adjusting the current RF gain to the target RF gain is further include:

The current RF gain is adjusted to a target RF gain.
A device for adjusting gain, comprising:

The service module is configured to: calculate, for each channel, a difference between the channel rated full power and the channel configuration power; and adjust the target baseband gain and the target RF gain according to the calculated difference;

The baseband module is configured to: adjust the current baseband gain to the target baseband gain;

The RF module is set to adjust the current RF gain to the target RF gain.
The apparatus of claim 8 wherein said service module is configured to:

For each channel, calculating a difference between the channel rated full power and the channel configuration power; determining that the calculated difference is less than or equal to the maximum value of the baseband gain and the baseband gain The difference between the minimum values, the target baseband gain is adjusted to y1, and the target RF gain is adjusted to C;

Where y1=Pc-M-N-C;

Wherein Pc is the power of the channel, and M is the corresponding radio frequency power when the baseband signal power is 0 full degree relative level dBFS, N is the maximum power of the baseband signal, and C is the maximum value of the radio frequency gain.
The apparatus of claim 9 wherein said service module is configured to:

Determining that the calculated difference is greater than a difference between the maximum value of the baseband gain and the minimum value of the baseband gain, adjusting the target baseband gain to A, and adjusting the target RF gain to be y2;

Where y2=Pc-M-N-A;

Where A is the minimum value of the baseband gain.
The apparatus of claim 8 wherein said service module is configured to:

Determining that the calculated difference is less than or equal to a difference between a maximum value of the radio frequency gain and a minimum value of the radio frequency gain, adjusting the target baseband gain to D, and adjusting the target radio frequency gain to be y3 ;

Where y3=Pc-M-N-D;

Where D is the maximum value of the baseband gain, Pc is the channel configuration power, and M is the corresponding radio frequency power when the baseband signal power is 0 full degree relative level dBFS, and N is the maximum power of the baseband signal.
The apparatus of claim 11 wherein said service module is configured to:

Determining that the calculated difference is greater than a difference between the maximum value of the radio frequency gain and the minimum value of the radio frequency gain, adjusting the target radio frequency gain to B, and adjusting the target baseband gain to be y4;

Where y4=Pc-M-N-B;

Where B is the minimum value of the RF gain.
The apparatus of claim 8 wherein said radio frequency module is configured to:

Calculating the current RF gain according to the power of the downlink subframe of the baseband signal at the same position and the downlink subframe of the antenna feed signal, and determining that the absolute value of the difference between the calculated current RF gain and the target RF gain is less than or equal to the pre-predetermined value Set the value to keep the current RF gain unchanged.
The apparatus of claim 13 wherein said radio frequency module is configured to:

It is determined that the calculated absolute value of the difference between the current RF gain and the target RF gain is greater than a preset value, and the current RF gain is adjusted to the target RF gain.
A computer readable storage medium storing computer executable instructions for performing the method of any of claims 1-7.