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Pre-coding matrix selecting method and system for space division multiplexing

A precoding matrix, space division multiplexing technology, applied in diversity/multi-antenna system, space transmit diversity, baseband system components and other directions, can solve the problems of complex operation and large amount of calculation.

Inactive Publication Date: 2013-05-08
GLOBAL INNOVATION AGGREGATORS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] It can be seen that the existing precoding matrix selection method has a matrix inversion operation, and the calculation amount is large and the operation is complicated.

Method used

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  • Pre-coding matrix selecting method and system for space division multiplexing
  • Pre-coding matrix selecting method and system for space division multiplexing
  • Pre-coding matrix selecting method and system for space division multiplexing

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Embodiment 1

[0074] Figure 4 A structural diagram of the precoding matrix selection system applied to space division multiplexing in Embodiment 1 of the present invention, as shown in Figure 4 As shown, the number of antennas at the transmitting end and the receiving end is 4 antennas. In this embodiment, the precoding matrix is ​​selected by the receiving end, the number of code streams is 2, and the receiving end uses a minimum mean square error (MMSE) receiver for decoding Specifically, the receiving end includes a channel estimation unit, a precoding codebook storage unit, a precoding matrix selection unit, and an index sending unit.

[0075] Figure 5 It is a schematic flowchart of a method for selecting a precoding matrix applied to space division multiplexing according to Embodiment 1 of the present invention, as shown in Figure 5 As shown, the precoding matrix selection method applied to space division multiplexing in Embodiment 1 of the present invention includes the followin...

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Abstract

The invention discloses a pre-coding matrix selecting method for space division multiplexing, which comprises the following steps of: acquiring a channel matrix H; approximately reducing the characteristic value of HHH according to the predefined pre-coding matrix in a pre-coding codebook and the channel matrix H respectively; and selecting an optimal pre-coding matrix according to the reduced characteristic value. The invention correspondingly discloses a pre-coding matrix selecting system for the space division multiplexing, which comprises a channel estimation unit, a pre-coding matrix selecting unit and a pre-coding codebook storage unit. SVD decomposition and matrix inversion operation of the estimated channel matrix H are not needed, so the method and the system can effectively reduce the calculation quantity and the operation complexity of pre-coding matrix selection.

Description

technical field [0001] The present invention relates to wireless network transmission technology, in particular to a precoding matrix selection method and system applied to space division multiplexing. Background technique [0002] Multiple-input multiple-output (Multi-input Multi-output, MIMO) technology has become an important way for future mobile communication systems to achieve high data rates and high transmission quality. A prominent feature of MIMO technology is that it can significantly improve the spectrum utilization rate of the wireless system, thereby increasing the data transmission rate. However, due to the correlation between multi-antenna spatial channels, it is difficult for the receiver to separate the multi-channel data. Therefore, if the transmitter fully knows or partially knows the channel state information, it can make full use of the known channel state information to transmit The signal is precoded to adjust the power of each transmit antenna in th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/06H04L25/02H04B7/06
Inventor 张婷李斌
Owner GLOBAL INNOVATION AGGREGATORS LLC
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