WO2008052385A1

WO2008052385A1 - Method for measuring aclr of a wcdma terminal and the apparatus thereof

Info

Publication number: WO2008052385A1
Application number: PCT/CN2006/002906
Authority: WO
Inventors: Zhong Yu; Jun Li; Hongli Peng
Original assignee: Zte Corporation
Priority date: 2006-10-30
Filing date: 2006-10-30
Publication date: 2008-05-08

Abstract

A method for measuring ACLR of a WCDMA terminal and the apparatus thereof, wherein the method includes the following steps: step S208, testing the power of a primary channel, a first adjacent channel and a second adjacent channel in the output of the WCDMA terminal, calculating ACLR value; step S210, judging whether the test is a first test, if so, then performing step S212, otherwise performing step S214; step S212, setting up a pre-evaluated model, and determining a transmission power increased step until achieving maximal power; step S214, determining a transmission power increased step according to the test result and the pre-evaluated model until achieving maximal power. The solution of the present invention enhances the precision and speed of the ACLR test.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a WCDMA mobile communication technology, and more particularly to a WCDMA/HSDPA/HSUPA terminal ACLR-based test method and apparatus. Background technique

WCDMA (Wideband CDMA) is a shortcut for GSM technology to smoothly evolve to 3G. It can support data transmission rates ranging from 384Kbps to 2Mbps. In high-speed mobile state, it can provide 384Kbps transmission rate at low speed or indoors. In the environment, a transfer rate of up to 2 Mbps is available. HSDPA (High Speed Downlink Packet Access) / HSUPA (High Speed Uplink Packet Access) is an enhancement to WCDMA technology, which can meet the high-speed data service of uplink and downlink. It is fully backward compatible with WCDMA R99, without the need for existing WCDMA. The network made major changes. HSDPA and HSUPA are currently seen as the evolution of WCDMA.

The new modulation coding method in HSDPA will greatly increase user data rate and throughput, which means enhanced spectral efficiency. At the same time, users can get faster connection speeds. Therefore, HSDPA technology can increase the WCDMA downlink rate from 384kbit/s to 14.4Mbit/s (peak rate), and the system capacity increases by 2-3 times, and the delay is greatly reduced. Corresponding to HSDPA, HSUPA theoretically provides users with 5.8 Mbps data access services by using more flexible Node B scheduling, hybrid automatic retransmission and other technologies.

ACLR (Adjacent Channel Leakage Ratio) is a measure of the transmission of RF energy in addition to the specified transmission channel. Usually due to the nonlinearity of the linear power amplifier, the system produces a higher ACLR, adjacent channel power leakage contributes to the channel noise floor. It directly reduces the system redundancy/capacity, and the ACLR feature will greatly affect the working status and communication status of other sites. Excessive values will give mobile phone users a so-called near-far effect.

The evolution of HSDPA and HSUPA technologies has driven the development of WCDMA technology. Mobile terminals have therefore introduced some new physical and logical channels. For example, the uplink physical channel is divided into new physical channels such as HS-DPCCH, E-DPCCH and E-DPDCH. The physical channel introduced in the uplink channel can increase the power peak-to-average ratio (PAPR) and CM (Cubic Metric). Therefore, in the HSUPA, the RFR and other RF indicators of the linear power amplifier are more strictly tested. In addition, HSDPA and HSUPA technologies have added a lot of channel configurations while introducing new channels. This is especially the complexity and accuracy of mobile terminal testing. SUMMARY OF THE INVENTION In view of the above problems, and in the 3GPP standard, the measurement methods and parameter settings of the ACLR in HSDPA/HSUPA are being studied. The object of the present invention is to meet this requirement while improving the accuracy and speed of ACLR testing under existing standard configuration conditions. In order to achieve the above object of the present invention, according to an aspect of the present invention, an ACLR test method for a WCDMA terminal is provided. The method includes the following steps: Step S208: Test the power value of the primary channel and the first adjacent channel and the second adjacent channel at the output end of the WCDMA terminal, and calculate an ACLR value; Step S210, determine whether the test is an initial test, if yes Step 212 is performed, otherwise step S214 is performed; step S212, a pre-estimation model is established, and a step size of the transmit power is determined until the maximum power is reached; and step S214, determining the transmission according to the test result and the pre-estimation model The power is increased by the step size until the maximum power is reached. In the above method, before the step S208, the method further includes: Step S202, setting a transmission parameter of the transmitter; Step S204, generating all corresponding autocorrelation byte sequences according to the length of the specified byte; Step - S206, selecting A set of byte sequences is used as a transmit signal for modulated transmission. Before the step S206, the method may further include: calculating an autocorrelation value of the autocorrelation byte sequence, and selecting a byte sequence with a higher autocorrelation value. In the step S206, the set of byte sequences is selected from a sequence of bytes having a higher autocorrelation value. The above method may further comprise the steps of: selecting another group of autocorrelation byte sequences for testing from the byte sequence with a higher autocorrelation value. When it is judged that all the byte sequence tests with higher autocorrelation values are completed, the test is ended, the final test result and the emission curve of the transmitter are calculated, and the test model is stored. In the above method, in the step S208, the power value is a power value that passes through the RRC filter. In the step S210, the pre-estimation model is established according to the spectral characteristics, and the pre-estimation model establishes AM/AM and AM/ by complex polynomial fitting on the input autocorrelation byte sequence and the output frequency. The relationship between the PMs is determined by the highest number of polynomials. Calculating the autocorrelation value of the autocorrelation byte sequence is performed by Fourier transforming the power speech density in the frequency domain into an autocorrelation function on the time domain. The increase step size is performed by estimating the release of the difference spline function and transmitting the power increase power control command. The present invention also provides a test apparatus for an ACLR of a WCDMA terminal, comprising: a calculation module 408, configured to test a power value of a primary channel and a first adjacent channel and a second adjacent channel at an output end of the WCDMA mobile terminal, and calculate an ACLR The determining module 410 is configured to determine whether the test is an initial test; the pre-estimation model establishing module 412 is configured to: The pre-estimation model is established in the case of the initial test; the adjustment module 414 is configured to increase the step size according to determining the transmit power when the judgment result of the judging module is the initial test, until the maximum power is reached, or in the judging module The result of the judgment is that, in the case of the non-initial test, the step size of the transmission power is determined according to the test result and the pre-estimation model until the maximum power is reached. The test device further includes: a parameter setting module 402, configured to set a transmit parameter of the transmitter; an autocorrelation byte sequence generation sequence 404, generating all corresponding autocorrelation byte sequences according to a length of the specified byte; and selecting a module 406, It is used to select a set of byte sequences as the transmit signal for modulated transmission. The above test apparatus further includes: an autocorrelation value calculation module, configured to calculate an autocorrelation value of the autocorrelation byte sequence, select a byte sequence with a higher autocorrelation value, and the selection module is configured to use the autocorrelation value The set of byte sequences is selected from a higher byte sequence. In the above test apparatus, the selection module is further configured to select another group of autocorrelation byte sequences from the byte sequence with higher autocorrelation values for testing. The test device further includes: a test end module, when it is determined that all the byte sequence tests with higher autocorrelation values are completed, the test end module ends the test, calculates a final test result, and a transmission curve of the transmitter, and Store the test model. In the above test apparatus, the power value is a power value that passes through an RRC filter. The pre-estimation model establishing module establishes the pre-estimation model according to a spectral characteristic, and the pre-estimation model establishes an AM/AM and an AM/PM by performing a complex polynomial fitting on the input autocorrelation byte sequence and the output spectrum. The relationship between the pre-estimation models is determined by the highest number of polynomials. The autocorrelation value calculation module calculates the institute by Fourier transform into an autocorrelation function on the time domain. The autocorrelation value of the autocorrelation byte sequence is the power spectral density in the frequency domain. The adjustment module estimates and transmits a power increase power control command according to the release of the difference spline function to increase the step size. The technical solution of the present invention has the following beneficial technical effects:

1) Using the autocorrelation function to calculate a fixed byte sequence with a high autocorrelation value as the transmitted signal, the maximum transmit power spectral density can be guaranteed in the time domain, and the sequence operation overhead can be reduced.

2) Establish a pre-estimation model for the test results, and use the pre-estimation model and the test deviation analysis results to adjust the transmit power increase step size, which can reduce the test blindness, reduce the redundancy test, improve the test accuracy and speed, and promote WCDMA / HSDPA / The HSUPA terminal conformance test provides a solution. The drawings are intended to provide a further understanding of the invention, and are intended to be a part of the description of the invention. In the drawings: FIG. 1 is a schematic diagram of a loopback test system for an ACLR test of the present invention; FIG. 2 is a flow chart of a test method for an ACLR according to the present invention; FIG. 3 is an embodiment of the present invention. A flowchart of a test method for an ACLR; and FIG. 4 is a schematic block diagram of a test device for an ACLR according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the present invention are described with reference to the accompanying drawings. As shown in FIG. 1, the loopback test system 100 for ACLR testing of the present invention includes a system simulation device 102 and a mobile terminal 104 to be tested. 2 is a flow chart of a test method for an ACLR in accordance with the present invention. As shown in FIG. 2, in step S202, the transmitter's transmission parameters are set, channel configuration and channel energy allocation are performed, and one DPCCH, M DPDCH channels, one HS-DPCCH channel, and one E-DPCCH and k are used. The E-DPDCH channels are combined into a composite channel, and the values of A, A/, Pea, ', and ^ are configured such that the terminal is at the minimum transmit power threshold minimum (eg, 18.3 dBm). Then, in step S204, the length of the specified byte is generated, and all corresponding autocorrelation byte sequences are generated. In step S206, the byte sequence having the higher autocorrelation value is selected as the transmission signal, and modulated transmission is performed. In step S208, the power values of the primary channel and the first primary channel and the second primary channel are tested at the output of the terminal and the ACLR value is calculated. According to the determination result in step 210, if the initial test execution step S212 is to establish the pre-estimation model, otherwise step S214 is performed according to the comparison test result and the pre-estimation model, determining the power increase step size to the maximum transmit power, and performing step S208, and looping The model is pre-estimated in step S212. It should be understood that in the method illustrated in Figure 2, some steps may be removed, such as steps S202, S204, and S206. Steps S208, S210, S212, and S214 may constitute a complete technical solution. 3 is a flow chart of a method of testing an ACLR in accordance with one embodiment of the present invention. As shown in FIG. 3, the ACLR test method according to an embodiment of the present invention includes the following steps: Step: 3⁄4 8301: According to Figure 1, a loopback test system is constructed, and the antenna terminal interface to be tested is connected to the system simulation. Apparatus, setting a transmission parameter; Step S303: Calculating an autocorrelation function of all bytes, and generating all corresponding autocorrelation byte sequences according to the length of the specified byte. Calculates the autocorrelation value of the autocorrelation byte sequence. The power spectral density in the test IF domain is transformed into an autocorrelation function in the time domain by Fourier transform, and a higher power speech density can be obtained from a byte sequence with a higher autocorrelation value, and a plurality of byte sequences with higher autocorrelation values are selected, so that Covering the non-linear transmitting area of the mobile terminal; Step S305: Selecting a set of byte sequences as the transmitting sequence for modulated transmission; Step S307: Testing the primary channel at the output end of the mobile terminal, and RRC filtering by the first adjacent channel and the second adjacent channel The power value of the device is calculated, and the ACLR value is calculated; Step S309: determining whether it is the initial test; if yes, establishing a pre-estimation model according to the spectral characteristics (step S311), the pre-estimation model can pass the input autocorrelation byte sequence and the output spectrum The complex polynomial fitting is performed to establish the relationship between AM/AM and AM/PM. The accuracy of the pre-estimation model can be determined by the maximum number of polynomials. If the non-initial test performs steps S313 and S315; steps S313 and S315: determine the transmit power increase step according to the test result and the pre-estimation model, and the growth step size may be estimated according to the difference spline function, etc., and the transmit power increases power. Control commands until maximum power; Step S317, determining whether it is the maximum power, if it is the maximum power, proceeding to step S321, if not the maximum power, proceeding to step S319; step S319, increasing the transmission power, returning to step S305; step S321, determining the selection Whether the sequence ends, if not, proceed to step S323, if it is over, end the test, calculate the final result and the transmitter emission curve, store the test model for other transmitter test, design the same batch of machine test model in production Similarly, the test time can be saved by using the existing test model; and step S323: the other group autocorrelation byte sequence is selected for testing, and the process proceeds to step S307. 4 is a schematic block diagram of a test apparatus for an ACLR according to the present invention. As shown in FIG. 4, the testing apparatus 400 includes a parameter setting module 402, an autocorrelation byte sequence generation module 404, a calculation selection module 406, a determination module 408, a pre-estimation model establishment module 410, an ACLR test module 412, and an adjustment module 414. The parameter setting module 402 is configured to configure the number of subchannels of the composite channel and the power parameters and time slot parameters between the subchannels. The autocorrelation byte sequence generation module 404 is operative to generate a series of autocorrelation byte sequences. The calculation selection module 406 is configured to select a sequence group having a higher autocorrelation value among the autocorrelation byte sequences generated by the autocorrelation byte sequence generation module 404. The decision module 408 is used to test the process judgment. The pre-estimation module 410 is configured to establish an ACLR test pre-estimation model.

The ACLR test 412 performs an ACLR value test after transmitting the specified autocorrelation byte sequence and outputs the test result. The adjustment module 414 is configured to perform a positive adjustment based on the ACLR test results and the existing pre-estimation model. The above test apparatus further includes: an autocorrelation value calculation module, configured to calculate an autocorrelation value of the autocorrelation byte sequence, select a byte sequence with a higher autocorrelation value, and the selection module is configured to use the autocorrelation value The set of byte sequences is selected from a higher byte sequence. In the above test apparatus, the selection module is further configured to select another group of autocorrelation byte sequences from the byte sequence with higher autocorrelation values for testing. The test device further includes: a test end module, when it is determined that all the byte sequence tests with higher autocorrelation values are completed, the test end module ends the test, calculates a final test result, and a transmission curve of the transmitter, and Store the test model. In the above test apparatus, the power value is a power value that passes through an RRC filter. The pre-estimation model establishing module establishes the pre-estimation model according to a spectral characteristic, and the pre-estimation model establishes an AM/AM and an AM/PM by performing a complex polynomial fitting on the input autocorrelation byte sequence and the output spectrum. The relationship between the pre-estimation models is determined by the highest number of polynomials. The autocorrelation value calculation module calculates the autocorrelation value of the autocorrelation byte sequence by Fourier transform into an autocorrelation function on the time domain by a power spectral density in the frequency domain. The adjustment module estimates and transmits a power increase power control command according to the release of the difference spline function to increase the step size. 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 method for testing an ACLR of a WCDMA terminal, comprising the following steps: Step S208, testing a power value of a primary channel and a first adjacent channel and a second adjacent channel at an output end of the WCDMA terminal, and calculating ACLR value;

Step S210, determining whether the test is an initial test, if yes, performing step 212, otherwise, performing step S214; step S212, establishing a pre-estimation model, and determining a transmit power increase step size until reaching a maximum power;

Step S214, determining a step size of the transmit power increase according to the test result and the pre-estimation model until the maximum power is reached.

2. The testing method according to claim 1, wherein before the step S208, the method further comprises:

Step S202: Set a transmit parameter of the transmitter. Step S204: Generate all corresponding autocorrelation byte sequences according to the length of the specified byte. Step S206: Select a set of byte sequences as the transmit signal to perform modulated transmission. _

The test method according to claim 1, wherein before the step S206, the method further comprises: calculating an autocorrelation value of the autocorrelation byte sequence, and selecting a byte with a higher autocorrelation value. sequence.

The testing method according to claim 1, wherein in the step S206, the set of byte sequences is selected from a sequence of bytes having a higher autocorrelation value.

5. The testing method according to claim 4, further comprising the following steps:

Other groups of autocorrelation byte sequences are selected for testing from the higher autocorrelation byte sequence.

The test method according to claim 5, wherein when it is determined that all the byte sequence tests with higher autocorrelation values are completed, the test is ended, and the final test result and the emission curve of the transmitter are calculated. And store the test model.

The test method according to any one of claims 1 to 6, wherein in the step S208, the power value is a power value that passes through an RRC filter.

The test method according to any one of claims 1 to 6, wherein in the step S210, the pre-estimation model is established according to a spectral characteristic, and the pre-estimation model passes the input The autocorrelation byte sequence is fitted with the output spectrum by a complex polynomial to establish a relationship between AM/AM and AM/PM, and the accuracy of the pre-estimation model is determined by the highest number of polynomials.

9. The test method according to any one of claims 2 to 6, wherein calculating an autocorrelation value of the autocorrelation byte sequence is performed by Fourier transform from a power spectral density in a frequency domain. The autocorrelation function on the domain is used.

The test method according to any one of claims 1 to 6, wherein the increase step size is performed based on the estimation of the difference spline function and the transmission power increase power control command.

11. A WCDMA terminal ACLR test apparatus, comprising:

The calculating module 408 is configured to test a power value of the primary channel and the first adjacent channel and the second adjacent channel at an output end of the WCDMA mobile terminal, and calculate an ACLR value;

The determining module 410 is configured to determine whether the test is an initial test; the pre-estimation model establishing module 412 is configured to establish a pre-estimation model if the judgment result of the determining module is an initial test;

The adjusting module 414 is configured to: when the determination result of the determining module is the initial test, determine the transmit power increase step size until the maximum power is reached, or the judgment result of the determining module is not the initial test In the case, the test result and the pre-estimation model determine the transmit power increase step size until the maximum power is reached.

The testing device according to claim 11, further comprising: a parameter setting module 402, configured to set a transmitting parameter of the transmitter; and an auto-correlated byte sequence generating sequence 404, the length of the specified byte, generated All corresponding autocorrelation byte sequences;

The selecting module 406 is configured to select a set of byte sequences as the transmitting signal to perform modulated transmission.

The test apparatus according to claim 12, further comprising: an autocorrelation value calculation module, configured to calculate an autocorrelation value of the autocorrelation byte sequence, and select a byte sequence with a higher autocorrelation value , the selection module And for selecting the set of byte sequences from a sequence of bytes having a higher autocorrelation value.

The testing device according to claim 13, wherein the selecting module is further configured to select another group autocorrelation byte sequence from the byte sequence with a higher autocorrelation value for testing.

The test apparatus according to claim 14, further comprising: a test end module, when it is determined that all the byte sequence tests with higher autocorrelation values are completed, the test end module ends the test, and the calculation The final test results are along with the emission curve of the transmitter and the test model is stored.

The test apparatus according to any one of claims 11 to 15, wherein the power value is a power value that passes through an RRC filter.

The test apparatus according to any one of claims 11 to 15, wherein the pre-estimation model establishing module establishes the pre-estimation model according to a spectral characteristic, and the pre-estimation model passes an autocorrelation of an input The byte sequence is fitted with the output spectrum by a complex polynomial to establish a relationship between AM/AM and AM/PM. The accuracy of the pre-estimation model is determined by the highest number of polynomials.

The test apparatus according to any one of claims 11 to 15, wherein the autocorrelation value calculation module calculates the autocorrelation byte sequence by Fourier transform into an autocorrelation function on a time domain. The autocorrelation value is determined by the power spectral density in the frequency domain.

The test apparatus according to any one of claims 11 to 15, wherein the adjustment module estimates and transmits a power increase power control command according to the release of the difference spline function to increase the step size. .