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Channel estimation method and device

A technology for channel estimation and insertion position, which is applied in baseband system components, multi-frequency code systems, etc., and can solve problems such as small subcarrier spacing, mutual interference between subcarriers, and affecting the accuracy of channel estimation.

Active Publication Date: 2016-05-18
无锡感知金服物联网科技有限公司
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Problems solved by technology

[0003] However, the inventors found that the subcarrier spacing of the multi-carrier system in the prior art is relatively small, and it is susceptible to the influence of frequency offset and channel time variation when transmitting pilot symbols, resulting in mutual interference between subcarriers and affecting The transmission performance of the pilot symbols, which in turn affects the accuracy of channel estimation when performing channel estimation

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  • Channel estimation method and device

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Embodiment Construction

[0089] Hereinafter, the implementation of the channel estimation method and device according to the embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0090] figure 1 It is the first channel estimation method in the embodiment of the present invention, which can be set at the sending end of the pilot symbol; for example figure 1 As shown, the method includes:

[0091] Step 101: Determine the pilot subcarrier spacing and the insertion position offset value of adjacent frequency domain pilot symbols;

[0092] Step 102: According to the pilot carrier spacing and the insertion position offset value of adjacent frequency domain pilot symbols, insert the frequency domain pilot symbols into the effective subcarriers corresponding to the frequency domain pilot symbols;

[0093] Step 103: Determine a time-domain pilot symbol according to the frequency-domain symbol sequence obtained after the insertion process;

[0094] St...

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Abstract

The invention discloses a channel estimation method and a channel estimation device. The channel estimation method includes the following steps: a pilot frequency sub-carrier distance and an insert position deviation value of pilot frequency symbols in adjacent frequency domains are determined; according to the pilot frequency sub-carrier distance and the insert position deviation value of the pilot frequency symbols in adjacent frequency domains, the pilot frequency symbols in the frequency domains are inserted in effective sub-carriers corresponding to the frequency domain pilot frequency symbols; according to a frequency domain symbol sequence obtained after inserting processing, time domain pilot frequency symbols are determined; and the time domain pilot frequency symbols are transmitted, so that an opposite end carries out channel estimation according to the time domain pilot frequency symbols after receiving the time domain pilot frequency symbols. By means of the channel estimation method and the channel estimation device, influences on transmission from frequency deviation and channel time-varying characteristics can be avoided, and the accuracy of the channel estimation is improved.

Description

technical field [0001] The present invention relates to the communication field, in particular to a channel estimation method and device. Background technique [0002] The concept of OFDM (Orthogonal Frequency Division Multiplexing) was proposed in the 1950s and 1960s, and the patent of OFDM was published in 1970. Multiplexing) method to transfer data in parallel. [0003] However, the inventors found that the subcarrier spacing of the multi-carrier system in the prior art is relatively small, and it is susceptible to the influence of frequency offset and channel time variation when transmitting pilot symbols, resulting in mutual interference between subcarriers and affecting The transmission performance of the pilot symbols, and then when performing channel estimation, affects the accuracy of channel estimation. Contents of the invention [0004] In view of this, the technical problem to be solved by the present invention is to provide a channel estimation method and de...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02H04L27/26
Inventor 姜建沈杰刘海涛
Owner 无锡感知金服物联网科技有限公司
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