Pre-code achieving method, pre-code achieving device and multiple input multiple output (MIMO) system

An implementation method and precoding technology are applied in the field of devices, MIMO systems, and precoding implementation methods, which can solve the problems of inability to dynamically implement linear coding and nonlinear coding switching, and achieve the effects of improved performance and easy implementation.

Inactive Publication Date: 2013-06-19
SHENZHEN INSTITUTE OF INFORMATION TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0054] The purpose of the embodiments of the present invention is to provide a method for realizing precoding, aiming at solving the problem that in the existing MIMO system, when precoding the signal at the transmitting end of the downlink, the gap between linear coding and nonlinear coding cannot be dynamically realized. The problem of switching between

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  • Pre-code achieving method, pre-code achieving device and multiple input multiple output (MIMO) system
  • Pre-code achieving method, pre-code achieving device and multiple input multiple output (MIMO) system
  • Pre-code achieving method, pre-code achieving device and multiple input multiple output (MIMO) system

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Embodiment 1

[0081] figure 2 It is the implementation method of precoding provided by the first embodiment of the present invention, the method can be applied to the base station eNB and multiple user equipment UEs, and specifically includes the following steps:

[0082] In step S201, channel state information sent by multiple user equipments is received.

[0083]The transmitting end (base station eNB) first sends channel state information reference signals to multiple user equipment UEs; user equipment UEs perform channel measurement according to the received channel state information reference signals, determine channel state information (CSI), and then feed back Channel state information to the base station eNB. According to the PHY standard research of LTE R8 / R9 / R10, channel state information CSI includes two possible forms: one is implicit feedback, which is currently used in the standard, and the feedback forms are mainly PMI, RI and CQI; the other One is explicit feedback. The fe...

Embodiment 2

[0094] image 3 It is the implementation method of precoding provided by the second embodiment of the present invention, which can be applied to the base station eNB and multiple user equipment UEs, and specifically includes the following steps:

[0095] In step S301, channel state information sent by multiple user equipments is received.

[0096] In step S302, a preset number of multiple user equipments are selected from users available for pairing to perform multi-user MIMO user pairing.

[0097] In step S303, the actual precoding type is selected according to the preconfigured precoding type, and the data of the selected multiple user equipments are precoded according to the precoding type to generate a multi-user MIMO precoding codeword.

[0098] Before receiving the channel state information sent by multiple user equipments, the base station configures the precoding type. The precoding type includes linear coding and nonlinear coding. When the precoding type configured b...

Embodiment 3

[0104] Figure 4 It is the implementation method of precoding provided by the second embodiment of the present invention, which can be applied to the base station eNB and multiple user equipment UEs, and specifically includes the following steps:

[0105] In step S401, channel state information sent by multiple user equipments is received.

[0106] In step S402, a preset number of multiple user equipments are selected from users available for pairing to perform multi-user MIMO user pairing.

[0107] In step S403, the channel state information relationship of the paired user equipment is calculated according to the channel state information.

[0108] The channel state information relationship of the paired user equipment refers to the chord distance (chord distance) of the channel matrix between the paired user equipments or the chord distance (chord distance) of the chord distance of the precoding matrix indicated by the precoding matrix indication PMI between the paired user...

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Abstract

The invention is suitable for the technical field of communication and provides a pre-code achieving method, a pre-code achieving device and a multiple input multiple output (MIMO) system. The pre-code achieving method comprises the steps of receiving channel state information sent by multiple user devices; selecting a preset number of user devices from users for being paired to perform user pairing of multiple-user MIMO; selecting actual pre-code type according to a preset strategy, performing pre-code treatment to data of the selected multiple user devices according to the pre-code type to produce pre-code words of the multiple-user MIMO; broadcasting the preset number of pre-code words of the multiple-user MIMO and demodulation reference signals corresponding to the pre-code words of the multiple-user MIMO to the multiple user devices. On the one hand, the performance of the multiple-user MIMO or cooperative multiple-point transmission COMP is improved; on the other hand, a pre-code achieving system easily achieves user MIMO or the cooperative multiple-point transmission COMP.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a precoding implementation method, device and MIMO system. Background technique [0002] In the Long Term Evolution system (LTE: Long Term Evolution), there are three forms of channel state information (Channel State Information, CSI) reflecting the state of the downlink physical channel: channel quality indication (Channels quality indication, CQI), precoding matrix indication (Precoding matrix indication) -coding Matrix Indicator, PMI), Rank Indicator (Rank Indicator, RI). [0003] CQI is an index to measure the quality of downlink channel. In the 36-213 protocol, the CQI is represented by an integer value from 0 to 15, which represent different CQI levels. Different CQIs correspond to their respective modulation methods and coding rates (MCS). There are 16 cases in total, and 4 can be used. represented by bits of information. [0004] PMI means that only i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06
Inventor 卢鑫王建华王文利
Owner SHENZHEN INSTITUTE OF INFORMATION TECHNOLOGY
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