Multiple-input multiple-output system and its realization method

Abstract

The invention relates to a multi-input multi-output system and an implementation method thereof, wherein the method comprises the following steps: respectively combining a signal from the output end of each antenna of a multi-antenna communication system with a signal from the output end of an antenna of another communication system; and taking each combined signal as a signal source, respectively inputting the signal source in various floor branch antennas of an indoor distribution system, wherein the signal source input into any floor branch antenna is different from the signal source input into one or two floor branch antennas in adjacent floors, and implementing double flow by utilizing a single-channel indoor distribution system. According to the invention, the multi-input multi-output system is implemented in the indoor distribution system with the relatively low cost.

Description

technical field [0001] The present disclosure relates to the field of MIMO (Multiple Input Multiple Output, multiple input multiple output), and in particular, relates to a multiple input multiple output system and an implementation method thereof. Background technique [0002] 2014 will be the first year of LTE (Long Term Evolution, long-term evolution) network, and also a year of great development of LTE network. With the development of mobile Internet, mobile data traffic shows an explosive growth trend, and relevant statistics show that 70% to 80% of mobile data services occur in indoor environments, so indoor coverage is the most important in the near future and in the future. The focus of the operator's attention. In order to improve the indoor coverage effect and speed up the progress of network construction, various operators vigorously organize and carry out indoor distribution reconstruction and construction work, and the competition for indoor traffic has become ...

AI Technical Summary

Problems solved by technology

[0008] At present, in the LTE network construction, outdoor stations all adopt 2T2R (that is, 2 channels of transmission and 2 channels of reception) or 2T4R, etc., and MIMO is realized outdoors, but in the case of indoor division and simple combination, because each Although there are multiple antennas on each floor, they are all connected to a certain port of the device, that is, only one signal branch is included, and the transmitted signals are all the same signal, with strong autocorrelation and poor orthogonality, and the rank of the propagation matrix is 1, so MIMO cannot be achieved

That is to say, the theoretical rate of outdoor users can reach more than 100Mbps, and the rate will be reduced by half as soon as they enter the room, which will bring inconsistent experience to future operations and will inevitably have a serious impact on user perception when the network is launched in the future.

[0009] (2) The cost-effectiveness ratio of network investment is low

[0015] Since the current room distribution system is transformed on the basis of the original C-network room distribution system, and the original C-network room distribution system is a mature property, it is very difficult to coordinate the real estate during the LTE room distribution system transformation, and it is unlikely to transform the original room distribution system into a two-way Indoor division and frequency shifting methods are basically impossible to implement due to the need to install and use active antennas, and the original property decoration needs to be destroyed during renovation.

[0016] (2) The cost of two-way indoor distribution is high

[0017] To transform the original C network single-way room distribution into a two-way room distribution, the cost is equivalent to building a new room distribution system, and the construction cost is unacceptable

[0018] The frequency shift method needs to replace all the antennas in the room, and the construction cost and construction difficulty are relatively large

[0019] (3) The renovation and construction period is long

[0020] Due to the large workload and long construction period, the two-way room division transformation and frequency shifting transformation cannot meet market demand under the current large-scale network construction conditions

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