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Channel estimation normalizing method and device for common distribution mode

A channel estimation and common allocation technology, applied in the normalization field of channel estimation, can solve the problems of performance loss, inability to correctly reconstruct the system correlation matrix, adjustment of different code channel power, etc., to improve the resistance to interference and noise. the effect of the ability

Active Publication Date: 2006-10-25
XUANPU INDUSTRY CO LTD
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Problems solved by technology

[0004] In the conventional detection algorithm, because when the downlink transmission power is different, the corresponding power adjustments are not made for different code channels, so the correlation matrix of the system cannot be correctly reconstructed during joint detection, resulting in performance loss

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  • Channel estimation normalizing method and device for common distribution mode
  • Channel estimation normalizing method and device for common distribution mode
  • Channel estimation normalizing method and device for common distribution mode

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Embodiment Construction

[0039] The following pass Figure 2 ~ Figure 4 , to introduce specific embodiments of the present invention in detail, so as to further understand the content of the present invention.

[0040] A normalization method for channel estimation in a time division synchronous code division multiple access system, which is used in the case where the system adopts a common allocation mode (COMMON MODE) to allocate shifted training sequences, such as figure 2 As shown, it specifically includes the following steps:

[0041] Step 21, calculate the power P of each channelization code of the current CCTrCH k , and get the power information list of each code channel PowerList={P k1 P k2 …P kn};

[0042] Step 22, perform activation detection on each channelization code, and obtain the activation status of the current CCTrCH of the target user and the channelization codes of other users;

[0043] Step 23: Perform channel estimation normalization on the channels corresponding to the ac...

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Abstract

Using this user's physical coded combination transfers information of channel. After detecting out information of active training sequence assigned to this user, or information of power of each active code channel, the method carries out normalization process for estimated value of channel of target user. When down going transmission power is different, the disclosed normalization method for estimating channel in TDS-CDMA system carries out relevant power adjustment for different code channels in order to raise combined testing accuracy of correlation matrix in time reconstructed system.

Description

technical field [0001] The present invention relates to a normalization method of channel estimation in a TD-SCDMA (Time Division Synchronous Code Division Multiple Access) system, specifically, it relates to a normalization method for channel estimation in a TD-SCDMA system in a public distribution mode. Integrated method and device. Background technique [0002] In the receiving device of the TD-SCDMA system, the distribution mode of the shifted training sequence in the whole system is determined by the network layer, and there are three kinds of distribution modes of the shifted training sequence in the whole system: default distribution mode (DEFAULT MODE), common distribution mode ( COMMON MODE) and user-specified allocation mode (UESPECFIC MODE), such as figure 1 shown. [0003] In the allocation of different shifted training sequences, the allocation of limited-length channel estimation resources in the system is different: when the allocation of the system shifted ...

Claims

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Application Information

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IPC IPC(8): H04L25/02H04J3/14
Inventor 王炳立
Owner XUANPU INDUSTRY CO LTD
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