WO2008061419A1

WO2008061419A1 - Testing device and method for the maximum transmitting power of mobile terminal

Info

Publication number: WO2008061419A1
Application number: PCT/CN2007/002325
Authority: WO
Inventors: Zhong Yu; Hongli Peng; Chen Lu
Original assignee: Zte Corporation
Priority date: 2006-11-23
Filing date: 2007-08-02
Publication date: 2008-05-29
Also published as: CN101068120B; CN101068120A

Abstract

A testing device and method for the maximum transmitting power of the mobile terminal. The testing device for the maximum transmitting power includes: a parameter setting module (102), for setting RF parameter and allocating compound channel, and setting the mobile terminal as being in loop back testing; a power gain adjusting module (104), connected to the parameter setting module (102), for estimating SIR of the channel, and adjusting the power gain according to the difference value between the estimating value of SIR and the utmost SIR of the system; and a maximum transmitting power confirming module (106), connected to the power gain adjusting module (104), for transmitting signal and calculating the maximum transmitting power of the signal in the instance of the power gain keeping constant. The device and the method may improve the testing accuracy and testing speed.

Description

For mobile terminals

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the field of communications, and in particular to a maximum transmit power test apparatus and method for a mobile terminal. BACKGROUND OF THE INVENTION The maximum transmit power of a mobile terminal is an indicator for measuring its maximum transmit capability, and the compression power point is the ability of its transmit power to increase with input power. In general, the output power of the power amplifier in the mobile terminal increases linearly with the increase of the power of the terminal input signal, but when the output power exceeds the compression power point and approaches the maximum transmission power, the output power of the amplifier gradually exhibits nonlinearity. characteristic. The nonlinear distortion of the power amplifier causes it to generate new frequency components, such as second harmonic and happy beat frequency for second-order distortion, and third harmonic and multi-tone beat for third-order distortion. If these new frequency components fall within the passband, they will directly interfere with the transmitted signal. If they fall outside the passband, they will interfere with the signals of other channels. In the mobile terminal 7 such as high speed downlink packet access (High Speed Downlink Package

Access, referred to as HSDPA) services and high-speed uplink packet access (HSUPA) services, must be combined with new physical and logical channels (eg, uplink physical channels) to introduce high-speed dedicated physical control. High Speed Dedicated Physical Control Channel (HS-DPCCH), Enhanced Dedicated Physical Control Channel (E-DPCCH), and E-DCH Dedicated Physical Control Channel (E-DCH Dedicated Physical Control Channel) Multi-code operation referred to as E-DPDCH) to increase the Peak-to-Average Power Ratio (PAPR) and Cubic Metric (Cubic Metric), thus testing the power amplifier's emission capability and linearity. More strict. To test the performance of the RF power amplifier, the necessary linearization must be performed while improving the amplification efficiency of the power amplifier to solve the problem of frequency reproduction of the signal. With the development of mobile terminals, the introduction of high-speed services such as HSDPA and HSUPA technologies has increased new channel and channel configurations, thereby increasing the complexity and accuracy of mobile terminal testing. In view of the above problems, in order to meet the above requirements, and in order to overcome the shortcomings of the prior art that the parameter definition in the channel configuration is unreasonable for the maximum power measurement in HSDPA and HSUPA, a test accuracy capable of improving the maximum transmission power of the mobile terminal is required. And the speed method. SUMMARY OF THE INVENTION In view of one or more of the problems described above, the present invention provides a maximum transmit power testing apparatus and method for a mobile terminal. The maximum transmit power test apparatus according to the present invention includes: a parameter setting module, configured to set a radio frequency parameter and configure a composite channel, and set the mobile terminal to enter a loopback test; and a power gain adjustment module connected to the parameter setting module Estimating a signal to interference ratio of the channel, and adjusting a power gain according to a difference between a signal to interference ratio estimate and a system limit signal to interference ratio; and a maximum transmit power determining module coupled to the power gain adjustment module for power With the gain remaining the same, the signal is transmitted and the maximum transmit power of the signal is calculated. The power gain adjustment module includes: a signal to interference ratio estimation module, configured to send data to the mobile terminal, and estimate a signal to interference ratio of the channel according to a response of the mobile terminal; a power growth step size determining module, configured to use the estimated signal The dry ratio and the system limit signal to interference ratio are used to determine the next power growth step; the power gain determination module is configured to set the power control command to 1 if the estimated signal to interference ratio is less than the system limit signal to interference ratio. In the case where the estimated signal-to-interference ratio is greater than the system limit signal-to-interference ratio, the power control command is set to 0; and in the case where the power control command is 1, the power gain is determined as the sum of the previous power and the power growth step. When the power control command is 0, the power gain is determined as the difference between the previous power and the power growth step, and in the case where the power control command is non-zero and non-1, the power gain is kept unchanged. In the case of a change in power gain, the power gain adjustment module determines the power gain by transmitting the signal multiple times until the power gain remains unchanged. Wherein, the power growth step size is determined by at least one of the following methods: a spline difference method and an Emile difference method. The maximum transmit power test apparatus according to the present invention is for testing at least one of the following mobile terminals: a wideband code division multiple access mobile terminal, a high speed downlink packet access terminal, and a high speed uplink packet access terminal. The maximum transmit power test method according to the present invention includes the following steps: S202, setting RF parameters And configuring the composite channel, and setting the mobile terminal to enter the loopback test; S204, estimating the signal to interference ratio of the channel, and adjusting the power gain according to the difference between the signal to interference ratio and the system limit signal to interference ratio, in the channel In the case where the gain is changed, the data is repeatedly transmitted to the mobile terminal and the power gain is adjusted until the power gain remains unchanged; and S206, while the power gain remains unchanged, the signal is transmitted and the maximum transmit power of the signal is calculated. Step S204 includes the following steps: Step S204-2: Send data to the mobile terminal, and estimate the signal to interference ratio of the channel according to the response of the mobile terminal; S204-4, the estimated signal to interference ratio and the system limit letter a ratio of power to determine the next power growth step; and S204-6, in the case where the estimated signal to interference ratio is less than the system limit signal to interference ratio, the power control command is set to 1, and the estimated signal to interference ratio is greater than In the case of the system limit signal to interference ratio, the power control command is set to 0; in the case where the power control command is 1, the power gain is determined as the sum of the previous power and the power growth step, and the power control command is 0. In the case, the power gain is determined as the difference between the previous power and the power growth step. In the case where the power control command is non-zero and non-zero, the power gain is kept unchanged; in the case where the power gain is changed, step S202 is repeated. -2 to S202-6 until the power gain remains unchanged. Wherein, the power growth step size is determined by at least one of the following methods: a spline difference method and an Emile difference method. The maximum transmit power test method according to the present invention can be tested by resetting the radio frequency parameters and reconfiguring the composite channel. The maximum transmit power test method of the present invention is used to test at least one of the following mobile terminals: a wideband code division multiple access mobile terminal, a high speed downlink packet access terminal, and a high speed uplink packet access terminal. In summary, the present invention improves the test accuracy and speed by using the difference method to test the maximum transmit power of the mobile terminal, and provides a solution for promoting the conformance test of the WCDMA/HSDPA/HSUPA terminal. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, In the drawing: 1A and 1B are block diagrams of a maximum transmit power test apparatus for a mobile terminal according to an embodiment of the present invention; FIGS. 2A and 2B are diagrams of a maximum transmit power test method for a mobile terminal according to an embodiment of the present invention; Flowchart; and FIG. 3 is a flow chart of a method for testing a maximum transmit power for a mobile terminal in accordance with another embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings. The present invention relates to a Wideband Code Division Multiple Access (WCDMA) mobile communication system, and more particularly to a method and apparatus for conformance testing of maximum output power for a WCDMA/HSDPA/HSUPA terminal. 1A is a block diagram of a maximum transmit power test apparatus for a mobile terminal according to an embodiment of the present invention. As shown in FIG. 1A, the maximum transmit power test apparatus includes: a parameter setting module 102, configured to set a radio frequency parameter and configure a composite channel, and set the mobile terminal to enter a loopback test; the power gain adjustment module 104, connected to the parameter setting a module, configured to estimate a signal to interference ratio of the channel, and adjust a power gain according to a difference between a signal to interference ratio estimate and a system limit signal to interference ratio; and a maximum transmit power determining module 106 coupled to the power gain adjustment module, configured to With the power gain remaining the same, the signal is transmitted and the maximum transmit power of the signal is calculated. As shown in FIG. 1B, the power gain adjustment module 104 includes: a signal to interference ratio estimation module 104-2, configured to send data to the mobile terminal, and estimate a signal to interference ratio of the channel in response to the mobile terminal; a determining module 104-4, configured to determine a next power growth step according to the estimated signal to interference ratio and a system limit signal to interference ratio; the power gain determining module 104-6, configured to estimate that the signal to interference ratio is less than the system In the case of the limit signal to interference ratio, the power control command is set to 1, and the power control command is set to 0 when the estimated signal to digital ratio is greater than the system limit signal to interference ratio; and the power control command is 1 when the power control command is 1. The power gain is determined as the sum of the previous power and the power growth step. When the power control command is 0, the power gain is determined as the difference between the previous power and the power growth step, and the power control command is non-zero. In the case of non-1, the power gain is kept constant. Wherein, in the case of a change in power gain, the power gain adjustment module determines the power gain by transmitting the signal multiple times until the power gain remains unchanged. Among them, you can pass at least one of the following Method to determine the power growth step: spline difference method and Emile difference method. The maximum transmit power test apparatus according to an embodiment of the present invention may be used to test at least one of the following mobile terminals: a wideband code division multiple access mobile terminal, a high speed downlink packet access terminal, and a high speed uplink packet access terminal. 2A is a flow chart of a method for testing a maximum transmit power for a mobile terminal, in accordance with one embodiment of the present invention. As shown in FIG. 2A, the maximum transmit power test method includes the following steps: S202, setting radio frequency parameters and configuring a composite channel, and setting a mobile terminal to enter a loopback test; S204, estimating a channel to interference ratio, and according to the signal The power gain is adjusted by the difference between the ratio estimate and the system limit signal-to-interference ratio, and in the case where the channel gain is changed, the data is repeatedly transmitted to the mobile terminal and the power gain is adjusted until the power gain remains unchanged; and S206, at the power gain With the same constant, the signal is transmitted and the maximum transmit power of the signal is calculated. As shown in FIG. 2B, step S204 includes: S204-2, transmitting data to the mobile terminal, and estimating a signal to interference ratio of the channel according to the response of the mobile terminal; S204-4, estimating the signal to interference ratio and The system limits the signal-to-interference ratio to determine the next power growth step; and S204-6, in the case where the estimated signal-to-interference ratio is less than the system limit signal-to-interference ratio, the power control command is set to 1, in the estimated letter When the dry ratio is greater than the system limit signal to interference ratio, the power control command is set to 0; when the power control command is 1, the power gain is determined as the sum of the previous power and the power growth step, in the power control command In the case of 0, the power gain is determined as the difference between the previous power and the power growth step, and in the case where the power control command is non-zero and non-one, the power gain is kept constant. Wherein, in the case where the power gain is changed, steps S202-2 to S202-6 are repeated until the power gain remains unchanged. Wherein, the power growth step size can be determined by at least one of the following methods: a spline difference method and an Emile difference method. The maximum transmit power test method according to an embodiment of the present invention can be tested by resetting radio frequency parameters and reconfiguring the composite channel. The maximum transmit power test method according to an embodiment of the present invention may be used to test at least one of the following mobile terminals: a wideband code division multiple access mobile terminal, a high speed downlink packet access terminal, and a high speed uplink packet access terminal. 3 is a flow chart of a method for testing a maximum transmit power for a mobile terminal in accordance with another embodiment of the present invention. As shown in FIG. 3, the maximum transmit power test method includes the following steps:

S302-S304, setting radio frequency parameters according to the standard, and determining a high-speed data channel and a channel of a dedicated physical control channel (DPCCH) Channel configuration, adjust DPCCH, and DPDCH, and other high-speed control or traffic channels (eg, HS-DPCCH), and E-DCH power ratio (configuration A, A, , and "equal power control coefficients"), establish a high-speed data channel Call, allocate the power of each subchannel, and set the mobile terminal to enter the loopback test. S306, select the initial transmit signal power P1 within the standard specified range, and the initial transmit signal power P1 sends the data sent through the high speed data channel to The mobile terminal to be tested, and the Signal to Interference Noise Ratio (SIR) is estimated from the received signal;

S308, according to the difference between the estimated signal-to-interference ratio obtained in the test and the system limit allowable signal-to-interference ratio SIRmax, ASIR=SIR-SIRmax, according to the interaction relationship between the signal-to-interference ratio and the transmission power, using spline interpolation or Interpolation method such as Emile interpolation method determines the next power growth step Δ Pi, where Δ Ρί is related to ASIR;

S310, in the control channel, according to the ASIR Transmit Power Control (TPC), when the received SIR value is less than the system limit allowable SIR value, TPC=1, when the receiving SIR value is greater than the system limit allowable SIR, TPC= 0. S312-2 and S312-4, when TPC=1, increase the next transmit power, the next transmit power=previous power Pi+power increase step size Δ Ρί, and perform power control through the control channel, and then pass the data channel The corresponding high-speed data is transmitted, high-speed data services are performed, the average transmit power is calculated, and the SIR value is obtained.

S314-2 and S314-4, when TPC=0, reduce the next transmission power, the next power gain=previous power Pi-A Pi, and perform power control through the control channel, and then perform high-speed data through the data channel. Service communication, calculate the average transmit power, and obtain the SIR value. Steps S308 and S310 are performed to determine the TPC value. When the TPC is 0 or 1, step S312 or S314 is performed, otherwise the next step is performed.

S316, when the TPC is non-zero and non-one value, the power gain remains unchanged, the average transmit power is calculated, the maximum transmit power is obtained, and the test result is output. Set the new channel configuration and the corresponding power control coefficients and repeat the above test steps for testing. In summary, the present invention changes the point-by-point scanning method in the existing test method. According to the interpolation estimation of the last received SIR estimate and the system limit allowable SIR, the interpolation method is used to estimate the increase step size of the current transmission, and the effective reduction is effectively reduced. Test cycle, improve test accuracy and test error, and effectively prevent The test output is too large and the output power is too large, causing damage to the amplifier and related devices, improving the safety and reliability of the test. That is to say, the present invention solves the problem that the channel configuration increases after the introduction of the HSDPA and HSUPA technologies in the WCDMA mobile terminal, and the maximum output power test time and test accuracy of the mobile terminal need to be improved. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

A maximum transmit power test apparatus for a mobile terminal, comprising:

a parameter setting module, configured to set a radio frequency parameter and configure a composite channel, and set the mobile terminal to enter a loopback test;

a power gain adjustment module, coupled to the parameter setting module, configured to estimate a signal to interference ratio of the channel, and adjust a power gain according to a difference between a signal to interference ratio estimate and a system limit signal to interference ratio;

A maximum transmit power determination module is coupled to the power gain adjustment module for transmitting a signal and calculating a maximum transmit power of the signal if the power gain remains unchanged.

2. The maximum transmit power test apparatus according to claim 1, wherein the power gain adjustment module comprises:

a signal to interference ratio estimation module, configured to send data to the mobile terminal, and estimate a signal to interference ratio of the channel in response to the mobile terminal;

a power growth step determining module, configured to determine a next power growth step according to the estimated signal to interference ratio and a system limit signal to interference ratio;

a power gain determining module, configured to set a power control command to 1 when the estimated signal to interference ratio is less than the system limit signal to interference ratio, where the estimated signal to interference ratio is greater than the system limit In the case of a signal to interference ratio, the power control command is set to 0; in the case where the power control command is 1, the power gain is determined as the sum of the previous power and the power growth step, When the power control command is 0, the power gain is determined as a difference between the previous power and the power growth step, and the power control command is non-

In the case of 0 and non-1, the power gain is kept constant.

3. The maximum transmit power test apparatus according to claim 2, wherein, in a case where the power gain is changed, the power gain adjustment module determines the power gain by transmitting a signal multiple times until the The power gain remains the same.

4. The maximum transmit power test apparatus according to claim 2, wherein the power growth step size is determined by at least one of the following: a spline difference method and an Emile difference method. The maximum transmit power test apparatus according to any one of claims 1 to 4, wherein the maximum transmit power test apparatus is configured to test at least one of the following mobile terminals: a wideband code division multiple access mobile terminal, and a high speed downlink A packet access terminal, and a high speed uplink packet access terminal. A method for testing a maximum transmit power for a mobile terminal, characterized in that the method comprises the following steps:

S202, setting radio frequency parameters and configuring a composite channel, and setting the mobile terminal to enter a loopback test;

S204. Estimate a signal to interference ratio of the channel, and adjust a power gain according to a difference between the signal to interference ratio and a system limit signal to interference ratio. In case the channel gain is changed, repeatedly send data to the mobile terminal and adjust the location. Power gain until the power gain remains the same;

S206. If the power gain remains unchanged, transmit a signal and calculate a maximum transmit power of the signal. The maximum transmit power test method according to claim 6, wherein the step S202 comprises:

S202-2: Send data to the mobile terminal, and estimate a signal to interference ratio of the channel according to a response of the mobile terminal;

S202-4, determining a next power growth step according to the estimated signal to interference ratio and a system limit signal to interference ratio;

S202-6. If the estimated signal to interference ratio is less than the system limit signal to interference ratio, set the power control command to 1, and the estimated signal to interference ratio is greater than the system limit signal to interference ratio. In the case where the power control command is set to 0; in the case where the power control command is 1, the power gain is determined as the sum of the previous power and the power growth step, in the power control command In the case of 0, the power gain is determined as the difference between the previous power and the power growth step. If the power control command is non-zero and non-1, the power gain is not maintained. Change

In the case where the power gain is changed, steps S202-2 to S202-6 are repeated until the power gain remains unchanged. The maximum transmit power test method according to claim 7, wherein the power growth step size is determined by at least one of the following: a spline difference method and an Emile difference method. The maximum transmit power test method according to claim 8, wherein the maximum transmit power test method performs testing by resetting the radio frequency parameters and reconfiguring the composite channel. The maximum transmit power test method according to any one of claims 6 to 9, wherein the maximum transmit power test method is used to test at least one of the following mobile terminals: a wideband code division multiple access mobile terminal, and a high speed downlink A packet access terminal, and a high speed uplink packet access terminal.