Abstract
The explosive growth of wireless data traffic in the future fifth generation mobile communication system (5G) has led researchers to develop new disruptive technologies. As an extension of traditional MIMO technology, massive MIMO can greatly improve the throughput rate and energy efficiency, and can effectively improve the link reliability and data transmission rate, which is an important research direction of 5G wireless communication. Massive MIMO technology is nearly three years to get a new technology of rapid development and it through a lot of increasing the number of antenna communication, using very duplex communication mode, make the system spectrum efficiency to an unprecedented height.
Highlights
In recent years, the growth of mobile data traffic has been increasing rapidly and is expected to reach 200 to 1,000 times by 2020
Massive Multiple-input multiple-output (MIMO) technology refers to the large number of antennas deployed by the base station, usually one hundred or hundreds of antennas [9], which is increased by several orders of magnitude over the existing communication system
1) The distributed MIMO channel is measured under 2.6GHZ microcellular conditions : In order to study the crosscorrelation characteristics of large-scale fading of distributed MIMO consisting of four base stations and a mobile station between different base station links, the channel in 2.6GHZ microcell environment has been measured in the previous literature [6]
Summary
The growth of mobile data traffic has been increasing rapidly and is expected to reach 200 to 1,000 times by 2020. Study found that when a village on the number of base station antenna becomes infinite, different user channel will tend to be orthogonal, additive white gaussian noise and small scale fading, all negative effects can be neglected, only limited to single user throughput is the same in the other community pilot sequences of interference users, system throughput than traditional MIMO system more than one order of magnitude [5][6]. Due to the large number of base station antenna MIMO and air separation users than traditional MIMO is orders of magnitude increases, both in the wireless communication on the basic principles and specific methods had different both in common, it provides researchers with contains many high research value of "gold mining and metallurgy" [7].
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