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A power self-calibration device and method for a multi-mode multi-frequency multi-channel system

A multi-mode, multi-frequency, calibration method technology, applied in the field of wireless communication, can solve the problems of inconvenient and different calibration time and space, and achieve the effect of improving power accuracy and strong versatility

Active Publication Date: 2017-06-16
CHINA ELECTRONIS TECH INSTR CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the influence of factors such as external temperature changes and device aging, even the same design on the same platform will have different electrical properties, especially for multi-channel systems. The electrical properties of different channels change over time. It will be very big, and it will be very inconvenient in terms of time and space if you go back to the original factory for calibration every time

Method used

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  • A power self-calibration device and method for a multi-mode multi-frequency multi-channel system
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  • A power self-calibration device and method for a multi-mode multi-frequency multi-channel system

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Embodiment Construction

[0020] Such as figure 1 As shown, the schematic diagram of the system of the present invention includes two receiving channels respectively RX1 and RX2, and two transmitting channels respectively TX1 and TX2. The two-way receiving and two-way transmitting technical schemes are the same. The single transmission channel contains thirteen units: transmission reference clock unit, baseband data generation unit, up-converter unit, radio frequency mixing unit, broadband local oscillator unit, open-closed loop conversion unit, modulator unit, multi-stage amplification unit, power Divider unit, detection and sampling unit, time-division synchronization operation unit, power adjustment unit, MIMO interface unit. The single receiving channel includes eight units: receiving power attenuation unit, pre-gain control unit, frequency mixing unit, broadband local oscillator unit, matched filter unit, down-converter unit, receiving reference clock unit, and data analysis unit.

[0021] The s...

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Abstract

The invention discloses a power self-calibration device and method for a multi-mode, multi-frequency, and multi-channel system, which includes two transmission channels and two reception channels. The transmission channel contains a time-division synchronization operation unit, which is used for detecting and sampling digital signals, Multiple averaging and composite operations are performed within the time slot, the original data is kept outside the time slot, and the data is converted into an analog voltage to control the different attenuation of the modulator. In the form of infinite approximation and negative feedback, the sampled data finally reaches a dynamic constant value, satisfying that the power accuracy of the transmitting channel signal is better than 0.2dB. The transmission channel uses the look-up table to control the output signal power, and calibrates the attenuator and intermediate frequency gain of the receiving channel through the transmitting channel. The test power accuracy is better than 0.5dB.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a power self-calibration device and method for a multi-mode, multi-frequency, and multi-channel system. Background technique [0002] The new generation of broadband wireless mobile communication network will realize the industrialization and large-scale application of LTE, and carry out the R&D and industrialization of LTE-Advanced key technologies, standardization and the overall industrial chain. TD-LTE-Advanced / TD-LTE / LTE-Advanced FDD / LTE FDD / TD-SCDMA / WCDMA / GSM [0003] Multi-mode and multi-frequency terminals are the direction of terminal development. A system capable of performing radio frequency testing on multi-mode and multi-frequency terminals is an essential test and verification platform for multi-mode terminal R&D and certification. [0004] According to the design, the multi-mode, multi-frequency and multi-channel system needs to be at least dual-tr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/34H04B17/11H04B17/21
Inventor 杨政凌云志铁奎张煜
Owner CHINA ELECTRONIS TECH INSTR CO LTD
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