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Method and device for transmitting public pilot frequency

A technology of common pilot frequency and dedicated pilot frequency, applied in the field of mobile communication, can solve the problem of no technical solution, and achieve the effect of improving channel estimation performance

Inactive Publication Date: 2009-12-30
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there is no relevant technical solution for the common pilot transmission method that removes the restriction of only using the first two common pilots

Method used

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  • Method and device for transmitting public pilot frequency
  • Method and device for transmitting public pilot frequency
  • Method and device for transmitting public pilot frequency

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] According to Embodiment 1 of the present invention, a common pilot sending method is provided.

[0035] image 3 is a flow chart of a common pilot transmission method according to Embodiment 1 of the present invention, such as image 3 As shown, the method includes:

[0036] Step 302, for a user equipment (UE) configured with a dedicated downlink pilot, the first four Orthogonal Frequency Division Multiplexing (Orthogonal Frequency Division Multiplexing, referred to as OFDM) symbols of each subframe of the UE correspond to the common pilots sent by the PBCH The number of antenna ports is the maximum number of antenna ports, that is, the base station sends common pilots on the configured antenna ports according to the mapping pattern specified in the 3GPP LTE standard;

[0037] Step 304, for a UE not configured with a dedicated downlink pilot, the number of antenna ports corresponding to the common pilots sent by each OFDM symbol in each subframe of the UE is the maxim...

Embodiment 2

[0057] According to Embodiment 2 of the present invention, a common pilot sending method is provided.

[0058] Figure 9 It is the common pilot transmission method according to Embodiment 2 of the present invention, such as Figure 9 As shown, the method includes:

[0059] Step 902, for a UE configured with a dedicated downlink pilot, the number of antenna ports corresponding to the first four OFDM symbols of each subframe of the UE and the common pilot sent by the PBCH is the maximum number of antenna ports, that is, the base station is configured on the configured antenna port According to the mapping pattern stipulated in the 3GPP LTE standard, common pilots are sent;

[0060] Step 904: For UEs that are not configured with downlink dedicated pilots, the number of antenna ports corresponding to the common pilots sent by each OFDM symbol in each subframe of the UE is the maximum number of antenna ports, that is, the base station uses the configured antenna ports according t...

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PUM

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Abstract

The invention discloses a method for transmitting public pilot frequency. The method comprises the following step: the antenna port number which corresponds to the public pilot frequency transmitted by front four orthogonal frequency division multiplexing symbols of each subframe of user equipment matched with downlink dedicated pilot frequency is the maximal antenna port number matched by a base station. The invention also provides a device for transmitting the public pilot frequency. The invention provides a scheme for transmitting the public pilot frequency under the condition of not transmitting front two public pilot frequency links and improves the channel estimation performance of the dedicated pilot frequency.

Description

technical field [0001] The present invention relates to the field of mobile communication, in particular to a common pilot transmission method and device for a 3GPP LTE (3rdGeneration partnership project Long Term Evolution) system and an LTE Advanced system. Background technique [0002] In the LTE system, the downlink dedicated pilot is used as a phase reference for demodulation of a downlink data shared channel (Physicaldownlink shared channel, PDSCH for short), which is configured semi-statically for a user terminal (User Terminal, UE for short) by high layers. Wherein, the downlink dedicated pilot is sent by the antenna port 5, and it is mainly applied to beamformed downlink reference signals, specific precoded downlink reference signals, and parallel load scenarios. [0003] The LTE 50bis meeting adopted the working assumption that only the common pilots of the first two antenna ports are transmitted when using the downlink dedicated pilots. According to this method, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/26H04L27/26
CPCH04L5/005H04L5/0023
Inventor 姜静孙云锋于辉夏树强赵楠
Owner ZTE CORP