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Method and system for processing reference signal of an open loop MIMO (multiple-input multiple-output) system

A technology of reference signal and processing method, which is applied in the field of communication, and can solve problems such as failure to send, high overhead of additional resource overhead of common reference signal pilots, etc.

Active Publication Date: 2012-12-26
如东县升泰新农村开发建设有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In future versions, considering many factors such as energy saving and resource saving, CRS needs to gradually fade out, so the open-loop transmission mode of TM3 needs to be designed based on DMRS, but there is no corresponding technical support at present, that is, it cannot be realized through DMRS The transmission of open-loop MIMO leads to high additional resource overhead brought by the common reference signal pilot

Method used

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  • Method and system for processing reference signal of an open loop MIMO (multiple-input multiple-output) system
  • Method and system for processing reference signal of an open loop MIMO (multiple-input multiple-output) system
  • Method and system for processing reference signal of an open loop MIMO (multiple-input multiple-output) system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0113] figure 1 The pattern of a group of pilots in a subframe of open-loop DMRS is given, including 12 DMRS groups.

[0114] Open-loop DMRS can be mapped to the {2, 3, 9, 10}th OFDM symbol. Suppose the positions of REs (resource elements) occupied by DMRS groups 0 to 11 are respectively (x0 to 11, y0 to 11), where x represents a subcarrier sequence number index in an RB (resource block), and y represents an OFDM symbol index. {x(m), y(m)}={m, (2,3,9,10)}, where m=0 to 11.

[0115] Optionally, for each DMRS group, TDM and / or CDM can be used to multiplex different DMRS ports. Different DMRS groups can use the same or different precoding weights, and different DMRS groups can also The weights of different layers with the same precoding weight are used, and the same DMRS group uses the weights of the same layer with the same precoding weight and / or the same precoding weight. When using CDM to multiplex different DMRS ports of resources in the same DMRS group, you can use Walsh codes...

Embodiment 2

[0117] figure 2 The pattern of a group of pilots in a subframe of open-loop DMRS is given, including 12 DMRS groups.

[0118] Open-loop DMRS can be mapped to the {2, 3, 5, 6}th OFDM symbol. Suppose the RE positions occupied by DMRS groups 0 to 11 are respectively (x0 to 11, y0 to 11), where x represents the index of the subcarrier number in one RB, and y represents the index of the OFDM symbol. {x(m), y(m)}={m, (2,3,5,6)}, where m=0 to 11.

[0119] Optionally, for each DMRS group, TDM and / or CDM can be used to multiplex different DMRS ports. When each DMRS contains two DMRS ports, the Walsh code can be used to locate {2 , 3, 5, 6} The multiplexing Walsh codes of two ports on two adjacent pilot resource elements of the same subcarrier on the same subcarrier on 3, 5, 6} OFDM symbols can adopt [1, 1], [1, -1]. Different DMRS groups can use the same and / or different precoding weights and / or different DMRS groups can use the same precoding weights for different layer weights, and the...

Embodiment 3

[0121] image 3 The pattern of a group of pilots in a subframe of open loop DMRS is given, including 4 DMRS groups.

[0122] Open-loop DMRS can be mapped to the {2, 3, 5, 6}th OFDM symbol. Suppose the RE positions occupied by DMRS groups 0 to 3 are respectively (x0 to 3, y0 to 3), where x represents the index of the relative subcarrier sequence number OFDM symbol in one RB, and y represents the index of the OFDM symbol. {x0,y0}={(0,4),(2,3,5,6)},{x1,y1}={(1,5),(2,3,5,6)},{x2 , Y2} = {(6, 10), (2, 3, 5, 6)}, {x3, y3} = {(7, 11), (2, 3, 5, 6)}, optional, For each DMRS group, TDM and / or CDM can be used to multiplex different DMRS ports. Different DMRS groups can use the same and / or different precoding weights and / or different DMRS groups can use the same For the weights of different layers of precoding weights, the same DMRS group uses the same precoding weights and / or the same layer weights of the same precoding weights. When using CDM to multiplex different DMRS ports of resour...

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PUM

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Abstract

The invention discloses a method and a system for processing a reference signal of an open loop MIMO (multiple-input multiple-output) system. The method comprises the following steps: utilizing a CDM (code division multiplexing) technology and / or a TDM (time division multiplexing) technology and / or FDM (frequency division multiplexing) technology in a special sub-frame, multiplexing different groups of open loop DMRSs (dynamic memory management system) on one symbol or more than one orthogonal frequency division multiplexing symbols in the second, third, fifth, sixth, ninth and tenth OFDM symbols; and utilizing the same or different weights as to different groups of open loop DMRSs, and carrying out corresponding weighted approach. According to the method and system for processing the reference signal of the open loop MIMO system, the pilot frequency design of the open loop is carried out on the basis of the DMRS; the pre-coded weight or weight formed by a wave beam at the network side cannot be limited by a codebook; the precision of the pre-coded or wave-beam formed weight is greatly improved, and the performance of UE (user equipment) under an open-loop environment can be improved possibly on the basis of not increasing the realization complexity, the test complexity and resource consumption of the UE.

Description

Technical field [0001] The present invention relates to the field of communications, in particular to a reference signal processing method and system for an open-loop multiple input multiple output (MIMO) system. Background technique [0002] In Long term evolution (LTE) version (Release, R) 8 / 9, in order to measure the quality of the channel and demodulate the received data symbols, the Common Reference Signal (CRS) is designed ), UE (User Equipment, user equipment) can measure the channel through the CRS, so as to determine the UE to reselect the cell and switch to the target cell, and measure the channel quality when the UE is connected. When the interference level is high, the physical The layer can disconnect the connection through high-layer related wireless link connection failure signaling. In LTE R10, in order to further improve the average spectrum utilization rate and cell edge spectrum utilization rate of the cell and the throughput rate of each UE, two reference sig...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04L1/06
Inventor 郭森宝孙云锋任敏
Owner 如东县升泰新农村开发建设有限公司
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