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Channel estimation method and device

A channel estimation and equipment technology, applied in the field of channel estimation, can solve problems such as low accuracy and reduced signal detection performance

Inactive Publication Date: 2013-07-24
CHINA ACAD OF TELECOMM TECH
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Problems solved by technology

[0007] A method and device for channel estimation provided by the embodiments of the present invention are used to solve the problem that the accuracy of the channel estimation method in the prior art is relatively low, thereby reducing the performance of signal detection

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Embodiment Construction

[0021] In the embodiment of the present invention, the original channel estimation values ​​corresponding to at least two training sequences are combined to obtain a composite channel estimation value, wherein the time interval between any two training sequences subjected to the combination processing is less than the set duration; according to the composite channel estimation value for channel estimation. Since the channel estimation is performed according to the synthetic channel estimation value obtained through the combining process, the accuracy of the channel estimation and the performance of the signal detection are improved.

[0022] The embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0023] Such as figure 2 As shown, the method for channel estimation in the embodiment of the present invention includes the following steps:

[0024] Step 201. Combine the original channel estimation values...

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Abstract

The invention relates to the technical field of wireless communication, in particular to a channel estimation method and device. The channel estimation method and device is used for solving the problem that performance of signal detection is reduced due to the fact that an existing channel estimation method is low in accuracy. According to the channel estimation method and device, original channel estimation values corresponding to at least two training sequences are merged to obtain a merged channel estimation value and then channel estimation is carried out according to the merged channel estimation value, wherein the time interval between any two training sequences treated with merging processing is smaller than a predetermined length of time. Due to the fact that the channel estimation is carried out according to the merge channel estimation value obtained through the merging processing, accuracy of the channel estimation is improved, and the performance of the signal detection is improved.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method and equipment for channel estimation. Background technique [0002] At present, the training sequence is mainly used to obtain channel estimation. For example, in the TD-SCDMA (Time Division Synchronous Code Division Multiple Access, Time Division Synchronous Code Division Multiple Access) system, its time slot structure is as follows Figure 1A shown. [0003] Among them, Midamble is the training sequence for obtaining channel estimation. Since the TD-SCDMA system training sequence is generated by Midamble cyclic shift method, the receiving end can use simple FFT (Fast Fourier Transform, Fast Fourier Transform) / IFFT (Inverse Fast Fourier Transform) , Inverse Fast Fourier Transform) transform to obtain the channel estimation result, and perform noise reduction processing on the channel estimation after the FFT / IFFT transformation, so as to obtain t...

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Application Information

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IPC IPC(8): H04L25/02
Inventor 谭凤鸣徐红艳张艳康绍莉
Owner CHINA ACAD OF TELECOMM TECH
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