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Power control method and equipment of special pilot frequency

A technology of dedicated pilot frequency and equipment, applied in the field of power control method and equipment of dedicated pilot frequency, to achieve the effects of fast power control, realization of power control, and improvement of MIMO demodulation performance

Active Publication Date: 2012-10-24
NANTONG HANGDA ELECTRONICS TECH
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, public pilots do not require power control, so the power control scheme of public pilots cannot be applied to dedicated pilots, and it is necessary to study the power control scheme of dedicated pilots

Method used

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  • Power control method and equipment of special pilot frequency
  • Power control method and equipment of special pilot frequency
  • Power control method and equipment of special pilot frequency

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Embodiment Construction

[0020] figure 1 It is a schematic flow chart of an embodiment of a power control method for a dedicated pilot in the present invention, including:

[0021] Step 11: Perform precoding processing on the dedicated pilot, the precoding matrix used in the precoding processing is the same as the precoding matrix used in the High Speed ​​Physical Downlink Shared Channel (HS-PDSCH);

[0022] Among them, the dedicated pilot (dedicated pilot) is a concept relative to the common pilot (common pilot), the common pilot is the pilot sent to all UEs, and the dedicated pilot is the pilot sent to a certain UE , the UE can perform more accurate channel estimation and data demodulation according to the corresponding dedicated pilot. For the specific concept of the dedicated pilot, refer to the provisions in the Long Term Evolution (Long Term Evolution, LTE) protocol.

[0023] The precoding matrix adopted by the HS-PDSCH refers to the precoding matrix adopted by the data carried by the HS-PDSCH...

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Abstract

The invention provides a power control method and equipment of special pilot frequency. The method comprises the following steps of: precoding the special pilot frequency, wherein a precoding matrix adopted for the precoding processing is the same with the precoding matrix adopted for HS-PDSCH (high-speed physical downlink shared channel); receiving feedback information of UE (user equipment), and adjusting the transmission power of the special pilot frequency and the transmission power of a first physical channel according to the feedback information, so that the adjusting amount of the special pilot frequency is equal to the adjusting amount of the first physical channel, wherein the first physical channel is DPCH (dedicated physical channel) or F-DPCH (fractional dedicated physical channel); and sending the precoded special pilot frequency by adopting the adjusted transmission power. By the embodiment, the special pilot frequency can be subjected to power control treatment.

Description

technical field [0001] The invention relates to mobile communication technology, in particular to a power control method and equipment for a dedicated pilot. Background technique [0002] The 3rd Generation Partnership Project (3GPP) plans to introduce 4 branches (branch) Multiple Input Multiple Output (MIMO) in the downlink of the Universal Mobile Telecommunications System (UMTS). During the discussion of 4-branch MIMO, it tends to introduce dedicated pilots in addition to common pilots. After the dedicated pilot is introduced, in order to make the receiving signal-to-noise ratio of the dedicated pilot meet the demodulation requirements of the user equipment (User Equipment, UE) as much as possible, and minimize the interference to other UEs, it is necessary to perform power control on the dedicated pilot. In the prior art, the public pilot does not need power control, so the power control scheme of the public pilot cannot be applied to the dedicated pilot, and it is neces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/04H04L1/00H04L1/06
Inventor 吴更石花梦杨毅焦淑蓉铁晓磊
Owner NANTONG HANGDA ELECTRONICS TECH
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