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A Large-Scale Multiple-Input-Output Wireless Channel Emulator

A wireless channel, input and output technology, applied in the field of electronic information, can solve the problem of a small number of channels, and achieve the effect of improving work efficiency and simplifying complexity

Active Publication Date: 2019-11-08
CHENGDU KSW TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is particularly necessary to design a full-duplex wireless channel emulator with a large number of channels, large signal bandwidth, high signal transmission rate, long simulation signal delay, and convenient signal phase calibration. At present, the number of channels of wireless channel emulators on the market No more than 32 channels, the simulation test support for Massive MIMO has the disadvantage of a small number of channels. To realize the 32*8 scale Massive MIMO simulation, two devices need to be cascaded to achieve it. At the same time, the existing wireless channel simulator The channel is in single-input and single-output mode, and an external instrument is required to calibrate the signal phase.

Method used

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  • A Large-Scale Multiple-Input-Output Wireless Channel Emulator
  • A Large-Scale Multiple-Input-Output Wireless Channel Emulator
  • A Large-Scale Multiple-Input-Output Wireless Channel Emulator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Such as figure 1 As shown, a large-scale multi-input and output wireless channel emulator is composed of multiple signal processing boards, signal exchange boards, frequency synthesis source boards, main control boards, backplanes, power supplies, external monitors, keyboards and mice, wherein the signal The specific application number of processing boards can be selected from 1 to 8 in actual application.

[0020] The signal processing board completes the processing of input signals, the simulation of input signals and the output of signals. The frequency synthesis source board provides local oscillator signals for each signal processing board. The signal exchange board completes the data exchange between multiple signal processing boards. The main control board Run the man-machine interface software, each signal processing board, frequency integrated source board and main control board realize the transmission of control signals through the backplane, the power supply...

Embodiment 2

[0022] Such as figure 2 As shown, each signal processing board contains a maximum of 8 input and output channels, and each input and output duplex channel includes 1 high-isolation power divider, 1 IQ demodulator, 1 ADC, 1 DAC, 1 IQ modulator, 1 large dynamic delay control module, 8 input and output duplex channels share 1 signal processor FPGA, and 1-8 channels can be selected for input and output duplex channels in practical applications.

[0023] Through 8 signal processing boards, each signal processing board is configured with 8 channels, realizing the design of 64 channels for a single device. Furthermore, if the number of channels required is less than 64 channels, it is only necessary to reduce the channel hardware configuration of the signal processing board or a certain signal processing board according to the number of channels.

Embodiment 3

[0025] Implementation of automatic phase calibration: such as figure 2 As shown, the signal processing FPGA of a signal processing board generates a continuous wave digital signal and outputs it to the DAC. After being converted by the DAC, two signals of I and Q are formed. After passing through the IQ modulator, an analog signal is formed and output to the high isolation power The signal is input to the IQ demodulator through the high-isolation power divider and demodulated into I and Q two-way signals, which are collected by the ADC and then input to the FPGA, which completes the signal processing project of self-sending and self-receiving. The FPGA calculates the phase error between the sent signal and the received signal, and obtains the phase error of this channel. The FPGA calculates the phase error of all channels in turn, and selects the phase error of the first channel as a reference value, and the phase error of the other channels Compared with the phase error of t...

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Abstract

The invention belongs to the technical field of electronic information, and particularly relates to a massive MIMO wireless channel simulation instrument and an implementation method of phase automatic calibration, wherein the massive MIMO wireless channel simulation instrument comprises a plurality of signal processing boards, a signal switching board, a frequency synthesis source board, a mastercontrol board, a backboard, a power supply, a display terminal and an input terminal. With the simulation instrument and the implementation method provided by the invention, 32*8 MIMO simulation by asingle device is solved, complexity of a testing system is simplified, and working efficiency is improved; and the simulation instrument has functions of comprising 64 input-output channels in one single device, supporting the Massive MIMO simulation of a 32*8 scale, being capable of realizing calibration of input signal phase without the help of external instruments and being capable of realizing high traffic data exchange among data of all the channels.

Description

technical field [0001] The invention belongs to the technical field of electronic information, and in particular relates to a large-scale multi-input-output wireless channel emulator and a method for realizing automatic phase calibration. Background technique [0002] MIMO technology refers to the use of multiple transmitting antennas and receiving antennas at the transmitting end and receiving end, respectively, so that signals are transmitted and received through multiple antennas at the transmitting end and receiving end, thereby improving communication quality. It can make full use of space resources, realize multiple transmissions and multiple receptions through multiple antennas, and can double the system channel capacity without increasing spectrum resources and antenna transmission power, showing obvious advantages, and is regarded as the next generation of mobile The core technology of communication. [0003] With the development of next-generation mobile communica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0413H04B17/391
CPCH04B7/0413H04B17/3912
Inventor 李文军张吉林房保卫沈亮张杰
Owner CHENGDU KSW TECH
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