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Method and device for reducing reference signal CM in carrier wave polymerization scene

A technology of reference signal and carrier aggregation, which is applied in the field of wireless communication and can solve problems such as the increase of equipment CM

Inactive Publication Date: 2009-08-26
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] The technical problem to be solved by the present invention is to overcome that when multiple carriers are configured in a cell in the LTE-A system, each aggregated carrier under the same power generation generates the same reference signal sequence according to the cell identification number, which leads to an increase in the CM of the device. In order to solve the problem, a method and device for reducing the CM value of the reference signal in the carrier aggregation scenario are proposed, which can reduce the CM of the transmitting end without basically changing the LTE specification, thereby reducing the power consumption of the device

Method used

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  • Method and device for reducing reference signal CM in carrier wave polymerization scene
  • Method and device for reducing reference signal CM in carrier wave polymerization scene
  • Method and device for reducing reference signal CM in carrier wave polymerization scene

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Embodiment 1

[0090] Embodiment 1 (Scheme 1)

[0091] For example, the number of downlink carriers configured in an LTE-A cell is N Total , where the number of non-backward compatible carriers is N Non , then the number of backward compatible carriers is N Total -N Non , where N Total -N Non >0.

[0092] Such as figure 1 As shown, the embodiment of the present invention includes the following steps:

[0093] Step 101, first generate a long sequence based on the sequence generation method in LTE Release 8, but different from LTE Release 8, we changed the length of m in formula (1):

[0094] S 1 = r l , n s ( m ) = 1 2 ( 1 - 2 · c ...

Embodiment 2

[0103] Embodiment two (scheme 2)

[0104] For example, when an LTE-A cell is configured with N Total Carriers, where N Non The number of non-backward compatible carriers configured for the downlink of this LTE-A cell, N Non_Max is the maximum number of non-backward compatible carriers in the LTE-A system, and N Non_Max ≥N Non , so the number of backward compatible carriers configured in this LTE-A cell is N Total -N Non , and N Total -N Non >0.

[0105] Such as figure 2 As shown, the embodiment of the present invention includes the following steps:

[0106]Step 201, first generate a long sequence based on the sequence generation method in LTE Release 8, but different from LTE Release 8, we changed the length of m in formula (1):

[0107] As shown in formula (4), we extend the length of m to 2(N Non_Max +1)N RB max，DL , ie K=N Non_Max +1:

[0108] r l , n s ...

corresponding approach 2

[0138] The generating module is used to generate the following long sequence:

[0139] r l , n s ( m ) = 1 2 ( 1 - 2 · c ( 2 m ) ) + j 1 2 ( 1 - 2 · c ( 2 m + 1 ) ) , m = 0,1 , . . . , 2 ( ...

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Abstract

The invention discloses a method and device for reducing reference signal CM in carrier wave polymerization scene. The method includes steps of generating long sequence according to LTE-A system carrier wave configure and cell specific descending reference signal sequence in LTE Release 8, grouping the generated long sequence, and distributing the long sequence according to cell carrier wave property to reduce base station terminal CM. The technical solution provided by the present invention can reduce CM of transmitting terminal at the premise of not changing the LTE standard basically, thereby reducing power consumption of device.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a method and device for reducing a reference signal cubic metric (Cubic Metric, CM) in a carrier aggregation scenario in a Long Term Evolution Advanced (LTE-A) system. Background technique [0002] In wireless communication, nonlinear distortion and peak amplitude limitation of high power amplifier (HPA) will cause inter-modulation effect between carriers and introduce additional interference in the system. In order to prevent this negative effect, the power amplifier should work in its linear range. Usually, in order to save device cost, a wireless communication terminal will not configure a power amplifier with a large linear range. In this case, if clipping is performed on a signal with a large amplitude, interference to the in-band signal and adjacent channel signals will occur. If the linearity characteristics of the PA are improved by "backing off", the power...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/707H04L5/00H04L27/26
CPCY02D30/70
Inventor 夏树强芮赟金圣峣田金凤易辉跃胡宏林
Owner ZTE CORP
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