Millimeter wave large-scale MIMO (Multiple Input Multiple Output) channel simulation system and method

Abstract

The invention discloses a millimeter wave large-scale MIMO (Multiple Input Multiple Output) channel simulation system. The system comprises a shielding device, wherein a large-scale MIMO system, a MIMO channel simulator and a channel and equipment control device are arranged outside the shielding device; a three-dimensional spherical probe device is arranged in the shielding device; the large-scale MIMO system is connected with the MIMO channel simulator; the MIMO channel simulator is connected with the three-dimensional spherical probe device; and the channel and equipment control device communicates with the three-dimensional spherical probe device and the MIMO channel simulator respectively. A channel space mapping method is adopted to realize space separation and mapping of beam signals, and an antenna-based subchannel is mapped into a space angle direction-based subchannel, thereby reducing the number of analog subchannels, simplify a channel generation method at the same time, effectively reducing simulator resources and lowering the cost.

Description

technical field [0001] The invention relates to communication test technology, in particular to a millimeter wave massive MIMO channel simulation system. Background technique [0002] The wireless channel is a complex and variable signal physical channel, and there are unfavorable factors such as multipath fading, flat fading, and noise that affect the communication performance, and these are issues that must be considered in the research of communication systems. The wireless channel simulator simulates the path loss, multipath fading and other related characteristics of the transmitted signal of the antenna port through the online real-time simulation of the wireless environment, accurately simulates the influence of the wireless environment on the system performance in the laboratory, and verifies the system equipment and terminals in various performance in complex scenarios. [0003] In the existing channel simulation test, the channel simulator is connected to the tran...

AI Technical Summary

Problems solved by technology

Facing hundreds of channels, upper GHz system bandwidth and millimeter-wave frequency band up to 100GHz, the main challenges faced by the existing channel simulation are: 1) Compared with the 8×2 multi-antenna system in the 4G era, 5G channel simulation The number of sub-channels simulated in real-time will increase by nearly two orders of magnitude, and the simulation resources will increase significantly, requiring high-cost multi-channel simulators to work together, and the simulators need to face data throughput rates of more than 1Tbps transmission Symbol (nanosecond) level synchronization on demand and transmission

This makes it extremely difficult for existing architectures to simulate massive MIMO channels

2) In the millimeter wave frequency band, the cable interconnection between devices is consistent, and since the 5G system equipment usually adopts the integrated design of the antenna and the RF front end, there is no RF interface for connecting the channel simulator, so it is necessary to study the new 5G millimeter wave Channel Simulation Test Method

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