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Method for transmitting signal

A technology for signal transmission and reference signal, applied in the shaping network of transmitter/receiver, baseband system components, preventing/detecting errors through diversity reception, etc., can solve the problem of no solution, etc., to improve the overall performance Effect

Inactive Publication Date: 2009-01-28
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the OFDM system, MIMO technology is adopted, and the base station can support the application of up to 8 antennas. Correspondingly, the reference signal also needs to support the 8-antenna scenario. In order to better apply MIMO technology, it is necessary to redesign the reference for spatial channel estimation. signal, at present, there is no specific solution in the prior art for the transmission method of the 8-antenna reference signal

Method used

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  • Method for transmitting signal
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Examples

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Embodiment 1

[0044] According to an embodiment of the present invention, a signal sending method is provided.

[0045] image 3 is a flowchart of a signal sending method according to an embodiment of the present invention, such as image 3 As shown, the method includes the following steps:

[0046] Step S302, divide the multiple antenna ports into 3 groups, each group contains multiple antenna ports, the number of antenna ports contained in the first antenna port group and the second antenna port group are the same, and the number of antenna ports contained in the third antenna port group The number of antenna ports is different, wherein the initial frequency domain position of the reference signal of each antenna port can be determined according to the cell identity;

[0047] Step S304, carrying and sending the reference signals of multiple antenna ports in the third antenna port group in the same symbol, wherein the interval of the reference signals belonging to the same antenna port o...

Embodiment 2

[0061] According to an embodiment of the present invention, a signal sending method is provided.

[0062] Figure 4 is a flowchart of a signal sending method according to an embodiment of the present invention, such as Figure 4 As shown, the method includes the following steps:

[0063] Step S402, divide the 8 antenna ports into 3 antenna port groups, wherein the first antenna port group includes 2 antenna ports, the second antenna port group includes 2 antenna ports, and the third antenna port group includes 4 antenna ports ;

[0064] Step S404, for each antenna port group, carry the reference signals of the antenna ports in the same symbol, wherein the initial frequency domain position of the reference signal of each antenna port can be determined according to the cell identifier;

[0065] Step S406, for the first and second antenna port groups, the interval of reference signals belonging to the same antenna port on the same symbol in the frequency domain is 6 subcarrier...

example 1

[0079] Figure 5(A) is a schematic diagram of the position of reference signals carrying 8 antenna ports in one resource block when the system uses a conventional cyclic prefix, and Figure 5(B) is a schematic diagram of the position of carrying 8 antennas in one resource block when the system uses an extended cyclic prefix Schematic diagram of the location of the reference signal at the port.

[0080] As shown in Figure 5(A), for the reference signal {R of the first antenna port group 0 , R 1}:

[0081] Will R 0 Carried on the kth subcarrier and the k+6th subcarrier of each resource block of the symbol numbered 0 in each slot, where k∈{0, 1, 2, 3, 4, 5};

[0082] Will R 0 It is also carried on the k+3th subcarrier and the mth subcarrier of each resource block of the symbol whose number is 4 in each time slot, where m=(k+9)mod12, k is the same as above;

[0083] Will R 1 Carried on the k+3th subcarrier and the mth subcarrier of each resource block numbered 0 in each time s...

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Abstract

The invention discloses a method for transmitting a signal, comprising the following steps: a plurality of antenna terminals are divided into three groups, each group comprises a plurality of antenna terminals; the first group of the antenna terminals and the second group of the antenna terminals have the same number of the antenna terminals; reference signals of the plurality of antenna terminals in the third group of the antenna terminals are loaded in the same symbol to be transmitted. Through the method, the transmission for eight antenna reference signals can be realized, thereby improving the whole performance of a system.

Description

technical field [0001] The present invention relates to the communication field, in particular to a signal sending method. Background technique [0002] Orthogonal Frequency Division Multiplexing (OFDM for short) is a multi-carrier modulation communication technology, which is one of the core technologies of the fourth generation mobile communication. In the frequency domain, the OFDM multipath channel exhibits the characteristics of frequency selective fading. In order to overcome this fading, the channel is divided into multiple sub-channels in the frequency domain. The spectral characteristics of each sub-channel are approximately flat, and the OFDM Each sub-channel is orthogonal to each other, allowing spectrums of the sub-channels to overlap with each other, which can maximize the use of spectrum resources. [0003] Multiple-Input Multiple-Output (MIMO) technology can increase system capacity, improve transmission performance, and can be well integrated with other phys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04L25/03H04L27/26
Inventor 梁春丽夏树强戴博郝鹏
Owner ZTE CORP
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