Granted Patent B2

US 12,401,447 · App. 18/565,276 · Granted Aug 26, 2025

Inventor: Kun Niu (Shenzhen, CN)

Assignee: ZTE CORPORATION

H04L1/0003H04B17/17H04L1/0026

Abstract

Claims (57)

1. An Error Vector Magnitude (EVM) measurement method, applied to a transmitter, comprising:

acquiring a cell configuration parameter from a control terminal device;

generating a test data source according to the cell configuration parameter;

obtaining a measurement signal according to the test data source;

determining an error vector magnitude according to the measurement signal and a preset reference signal; and

sending the error vector magnitude to the control terminal device, such that wherein the control terminal device determines whether there is any abnormality in RF indicators of the transmitter according to the error vector magnitude;

wherein the transmitter is provided with a plurality of channels for data transmission, and obtaining the measurement signal according to the test data source comprises:

transmitting the test data source via the plurality of channels to obtain multi-channel signals;

performing digital-to-analog conversion on the multi-channel signals to obtain multi-channel analog signals;

performing power amplification on the multi-channel analog signals to obtain multi-channel amplified analog signals;

sampling the multi-channel amplified analog signals to obtain multi-channel sampled signals, wherein the multi-channel sampled signals are a set of sampled signals from each of the plurality of channels;

selecting the specific channel signal from the multi-channel sampled signals; and

obtaining the measurement signal according to the specific channel signal.

2. The EVM measurement method of claim 1 , wherein obtaining a measurement signal according to the specific channel signal comprises:

coupling the specific channel signal to obtain a coupled signal, wherein the coupled signal contains data of a plurality of slots;

selecting data of a specific slot of the plurality of slots from the coupled signal; and

performing analog-to-digital conversion on the data of the specific slot to obtain the measurement signal.

3. The EVM measurement method of claim 2 , wherein determining an error vector magnitude according to the measurement signal and a preset reference signal comprises:

determining a test model according to the cell configuration parameter;

determining a modulation mode according to the test model;

obtaining a link delay according to the measurement signal and the reference signal;

performing delay alignment on the measurement signal according to the link delay to obtain first symbol data and second symbol data, wherein the first symbol data is service data corresponding to the link delay in the data of the specific slot, and the second symbol data is other service data except the service data corresponding to the link delay in the data of the specific slot;

performing channel estimation on a channel where the first symbol data is located according to the reference signal to obtain a channel parameter;

performing channel equalization on the second symbol data according to the channel parameter to obtain an equalized data; and

demodulating the equalized data according to the modulation mode to obtain the error vector magnitude.

4. The EVM measurement method of claim 1 , after sampling the multi-channel amplified analog signals to obtain multi-channel sampled signals, further comprising:

obtaining multi-channel service signals according to the multi-channel amplified analog signals;

filtering the multi-channel service signals to obtain filtered signals; and

sending the filtered signals.

5. An Error Vector Magnitude (EVM) measurement apparatus, comprising:

an information acquisition module, configured to acquire a cell configuration parameter from a control terminal device;

a generation module, configured to generate a test data source according to the cell configuration parameter;

a processing module, configured to obtain a measurement signal according to the test data source;

a test module, configured to determine an error vector magnitude according to the measurement signal and a preset reference signal; and

a transmission module, configured to transmit the error vector magnitude to the control terminal device, wherein the control terminal device determines whether there is any abnormality in RF indicators of a transmitter according to the error vector magnitude;

wherein the transmitter is provided with a plurality of channels for data transmission, and obtaining the measurement signal according to the test data source comprises:

transmitting the test data source via the plurality of channels to obtain multi-channel signals;

performing digital-to-analog conversion on the multi-channel signals to obtain multi-channel analog signals;

performing power amplification on the multi-channel analog signals to obtain multi-channel amplified analog signals;

sampling the multi-channel amplified analog signals to obtain multi-channel sampled signals, wherein the multi-channel sampled signals are a set of sampled signals from each of the plurality of channels;

selecting the specific channel signal from the multi-channel sampled signals; and

obtaining the measurement signal according to the specific channel signal.

6. A transmitter, comprising a memory, a processor, a program stored in the memory and capable of running on the processor, and a data bus for implementing connection and communication between the processor and the memory, wherein the program, when executed by the processor, causes the processor to carry out an Error Vector Magnitude (EVM) measurement method, applied to a transmitter, comprising:

acquiring a cell configuration parameter from a control terminal device;

generating a test data source according to the cell configuration parameter;

obtaining a measurement signal according to the test data source;

determining an error vector magnitude according to the measurement signal and a preset reference signal; and

sending the error vector magnitude to the control terminal device, wherein the control terminal device determines whether there is any abnormality in RF indicators of the transmitter according to the error vector magnitude;

wherein the transmitter is provided with a plurality of channels for data transmission, and obtaining the measurement signal according to the test data source comprises:

transmitting the test data source via the plurality of channels to obtain multi-channel signals;

performing digital-to-analog conversion on the multi-channel signals to obtain multi-channel analog signals;

performing power amplification on the multi-channel analog signals to obtain multi-channel amplified analog signals;

sampling the multi-channel amplified analog signals to obtain multi-channel sampled signals, wherein the multi-channel sampled signals are a set of sampled signals from each of the plurality of channels;

selecting the specific channel signal from the multi-channel sampled signals; and

obtaining the measurement signal according to the specific channel signal.

7. A base station, comprising a memory, a processor, and a computer program stored in the memory and capable of running on the processor, wherein the computer program, when executed by the processor, causes the processor to carry out the EVM measurement method of claim 1 .

8. A non-transitory computer-readable storage medium, storing a computer-executable program which, when executed by a computer, causes the computer to carry out the EVM measurement method of claim 1 .

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (18)