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TD-SCDMA associated detection technology based channel estimation method

A TD-SCDMA and joint detection technology is applied in the field of channel estimation improvement based on TD-SCDMA joint detection technology, and can solve the problems of low channel impulse response accuracy and low precision.

Active Publication Date: 2008-01-02
DATANG MOBILE COMM EQUIP CO LTD +1
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Problems solved by technology

When several code channels of a user correspond to multiple Midamble code offsets, in theory the channel impulse responses corresponding to these different Midamble code offsets are the same, but the above method does not take advantage of this feature, so The accuracy of the estimated channel impulse response is not very high, especially when the noise or interference is strong, the accuracy will be very low

Method used

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  • TD-SCDMA associated detection technology based channel estimation method
  • TD-SCDMA associated detection technology based channel estimation method
  • TD-SCDMA associated detection technology based channel estimation method

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Embodiment Construction

[0085] Below we will describe in detail the best implementation of the present invention with reference to the accompanying drawings. First of all, it should be pointed out that the meanings of the terms, words and claims used in the present invention should not be limited to their literal and ordinary meanings, but also include meanings and concepts that are consistent with the technology of the present invention. This is because It is up to us, as inventors, to define terms appropriately in order to best describe our inventions. Therefore, the configurations given in this specification and the accompanying drawings are only preferred implementations of the present invention, rather than enumerating all technical characteristics of the present invention. We need to recognize that there are various equivalents or modifications that could replace ours.

[0086] Based on the traditional channel estimation method, the present invention carries out weighted combination processing...

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Abstract

The invention provides a channel evaluation method based on TD-SCDMA coupled check technique, comprising that weighting and combining the channel impact response of all windows of the user at initial evaluation, according to the weighting and combining result, confirming the modified channel impact response of each window or code channel, wherein the result can be used as the modified impact response of each window or code channel. According to the weighting and combining result, the invention can confirm the modified channel impact response, comprising that averaging the result, reducing the amplitude of the averaged result, and using the result after amplitude reduction as the modified channel impact response.

Description

technical field [0001] The invention relates to a joint detection technology of TD-SCDMA, in particular to an improved channel estimation method based on the joint detection technology of TD-SCDMA. Background technique [0002] In the current TD-SCMDA system, joint detection technology is one of its characteristic solutions, and channel estimation technology is a very important part of joint detection technology. The accuracy of channel estimation directly affects the effect of joint detection. [0003] In the TD-SCDMA system, the joint detection technology mainly deals with time slots. The length of a TDMA (Time Division Multiple Access) frame defined by 3GPP (3rd Generation Partnership Project) is 10ms. In order to realize fast power control, timing advance calibration and support for some new technologies, the TD-SCDMA system will A 10ms frame is divided into two subframes with exactly the same structure, each subframe has a duration of 5ms, and each subframe with a dura...

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Application Information

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IPC IPC(8): H04L1/00H04B7/005
Inventor 杨蓓高炳涛
Owner DATANG MOBILE COMM EQUIP CO LTD
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