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Transmitter power calibration device and method

A power calibration and transmitter technology, applied in the field of wireless communication, can solve the problems of multi-channel radio frequency interference of the MIMO transmitter of the electronic components of the instrument, and the difficulty of maintaining the transmitting power of the transmitter, so as to ensure the accuracy of the transmitted signal power, improve the speed, The effect of strong generality and reference

Active Publication Date: 2016-04-20
THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The first purpose of the present invention is to provide a power calibration device for transmitters, which solves the problem that the existing high-precision MIMO transmitters are easily affected by changes in the external environment, the non-linear interval work of electronic components of the instrument, and the multi-channel gap between the MIMO transmitters. Due to its own radio frequency interference, the transmission power of the transmitter is difficult to keep consistent

Method used

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  • Transmitter power calibration device and method
  • Transmitter power calibration device and method
  • Transmitter power calibration device and method

Examples

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Embodiment 1

[0033] combine figure 1 A power calibration device for a transmitter includes a transmitter, a receiver and a main control unit, the transmitter is connected to the receiver, and the main control unit is connected to the transmitter and the receiver respectively.

[0034] The transmitter includes a baseband modulation signal unit and eight transmission channels. Each transmission channel is composed of a digital-to-analog converter, a first mixer, a second mixer, a modulator, an attenuator and a radio frequency output port connected in sequence. The digital-to-analog converter is connected with the baseband modulation signal unit, the radio frequency output port is connected with the receiver, and the baseband modulation signal unit is provided with a field programmable gate array.

[0035] A 614.4MHz clock signal is input to the digital-to-analog converter, a first local oscillator signal is input to the first mixer, and a second local oscillator signal is input to the second...

Embodiment 2

[0037] combine Figure 1 to Figure 3 , a method for calibrating a power calibrating device of a transmitter according to the above-mentioned embodiment 1, comprising:

[0038] Step 1: Divide the interval. Assuming that the transmit signal bandwidth is an LTE modulated signal of 20MHz, the frequency range from 1.8GHz to 6GHz in each transmit channel is divided into N1 interval points. Since the flatness of the frequency response is not enough, the frequency response is divided into intervals The division is smaller to ensure good accuracy. The frequency response of each transmission channel is divided into N2 interval points. Both N2 and N1 are positive integers, and N2 is greater than N1.

[0039] Step 2: Attenuator calibration, perform attenuator calibration on the N1 interval points in each transmission channel, each 10dB gear of the attenuator in the range of 0dB to 120dB obtains the difference between the real attenuation value and the expected attenuation value Differenc...

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Abstract

The invention provides a transmitter power calibration device and method. The transmitter power calibration device comprises a transmitter, a receiver and a main control unit. Estimation processing of calibration data is achieved by utilizing twice extract fitting methods, the power accuracy and the calibration speed requirements of a transmission channel are ensured, a transverse calibration process of a calibration process is achieved by a first extract fitting processing, and accurate calibration metadata at a current frequency point is ensured to be extracted; a longitudinal calibration process of the calibration process is achieved by a second extract fitting processing, and accurate modulation of a modulator transmission power value under a single point frequency condition is ensured; therefore, a requirement that the high-precision transmission power is ensured while the speed is increased is finally achieved. The transmitter power calibration device and method not only achieve a quick calibration purpose, but also ensure the power accuracy of transmission signals, and are suitable for other multichannel systems, and the universality and reference performance are high.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a transmitter power calibration device and a calibration method. Background technique [0002] With the continuous improvement of the new generation of mobile communication standards represented by LTE-Advanced and the continuous advancement of the commercialization process, the research on key communication technologies and testing technologies is also deepening. As the core of test technology, test instruments and meters are designed to test and verify a series of core technical problems, such as MIMO transmission diversity, MIMO space division multiplexing, carrier aggregation, etc., providing guarantee for solving this series of key technologies. The high-precision MIMO transmitter system can provide the transmission function of multi-channel broadband modulated signals, and is an essential platform for R&D, verification and production use. [0003] The high-p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/11
Inventor 杨传伟王嘉嘉凌云志
Owner THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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