Multi-input multi-output system, data transmission method and data transmission device thereof

A multi-output, multi-input technology, applied in baseband system components, shaping network in transmitter/receiver, preventing/detecting errors through diversity reception, etc., can solve system throughput impact, low system throughput, Increase signaling overhead and other issues to achieve the effect of reducing signaling overhead, expanding system capacity, and improving throughput

Active Publication Date: 2010-03-31
XIAOMI INC
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Problems solved by technology

[0006] For the open-loop SU-MIMO mode, the throughput of the system is low because the channel information is not fully utilized to match the channel; for the SU-MIMO mode in the closed-loop code

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  • Multi-input multi-output system, data transmission method and data transmission device thereof
  • Multi-input multi-output system, data transmission method and data transmission device thereof
  • Multi-input multi-output system, data transmission method and data transmission device thereof

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Embodiment Construction

[0031] In the embodiment of the present invention, in a MIMO system with uplink and downlink symmetry, the user terminal side can perform corresponding modulation on the data stream to be sent according to the received modulation and coding scheme (Modulation and coding Scheme, MCS) information determined by the base station side Encoding, and inserting user-specific demodulation reference signals in each data stream to be sent; performing eigenvalue decomposition according to the estimated downlink channel information to obtain the corresponding precoding matrix, which is used as the uplink precoding matrix ; using the uplink precoding matrix to precode the data stream inserted into the user-specific demodulation reference signal, and then send it to the base station side. The MIMO system applied in the present invention is a symmetric uplink and downlink system. Therefore, the eigenvalue decomposition can be performed according to the estimated downlink channel information to...

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Abstract

The invention discloses a multi-input multi-output system, a data transmission method and a data transmission device thereof, which are used for improving the throughput of uplink data transmission inthe multi-input multi-output system. The method comprises that: a user terminal side performs corresponding modulation and coding on a data stream to be transmitted according to received modulation and coding scheme MCS information determined by a base station side, and inserts a user dedicated demodulation reference signal into each data stream to be transmitted respectively; downlink channel estimation is performed, and according to downlink channel information obtained by the estimation, eigenvalue decomposition is performed to obtain a corresponding pre-coding matrix which is used as an uplink pre-coding matrix; and the uplink pre-coding matrix is adopted to pre-code the data stream inserted with the user dedicated demodulation reference signal, and then the pre-coded data stream is transmitted to the base station side. The method and the device fully utilize uplink channel state information to obtain the spatial diversity gain of a plurality of antennae and improve the throughputof the uplink data transmission.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a multiple input multiple output (Multiple Input Multiple Output, MIMO) system and a data transmission method and device thereof. Background technique [0002] MIMO technology uses multiple antennas for transmission and reception at both the transmitting end and the receiving end, thereby greatly improving the transmission performance and capacity of the system. The transmission diversity technology of MIMO is to repeatedly send the precoded data stream at the transmitter to obtain diversity gain and coding gain; the spatial multiplexing technology of the MIMO system is to send several different data streams at the transmitter, so as not to increase In the case of increasing the bandwidth, the capacity and spectrum efficiency of the communication system can be doubled, which truly embodies the essence of the capacity improvement of the MIMO system, but it requires t...

Claims

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Application Information

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IPC IPC(8): H04L1/06H04L25/03
Inventor 缪德山陈文洪拉盖施索士强孙韶辉
Owner XIAOMI INC
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