A method and device for channel estimation based on sliding window

A channel estimation and sliding window technology, applied in the field of channel estimation based on sliding window, can solve the problems of affecting channel estimation performance and increasing the mean square error value, and achieve the effect of improving performance and increasing computational complexity.

Active Publication Date: 2011-12-07
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology

However, the edge zone between particles does not make full use of the pilot information on both sides. If the particles are large, the mean square error of the particle edge estimation value will increase significantly, which will affect the overall channel estimation performance.

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  • A method and device for channel estimation based on sliding window
  • A method and device for channel estimation based on sliding window
  • A method and device for channel estimation based on sliding window

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Embodiment Construction

[0025] When using Wiener estimation for channel estimation, the process of Wiener interpolation filtering is as follows:

[0026] A set of channel responses of pilot positions have been obtained before interpolation, let the frequency and time indexes of the channel responses of pilot positions be k' and l' respectively, H(k', l') is the corresponding frequency domain channel Response. From these channel response values, the channel response value can be estimated by the two-dimensional Wiener filter interpolation algorithm, as shown in formula (1)

[0027] H ^ ( k , l ) = Σw ( k ′ , l ′ ; k , l ) H ( k ′ ...

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Abstract

The embodiment of the invention discloses a channel estimating method based on a sliding window, and the method comprises the following steps of: obtaining the information of the sliding window, obtaining channels of data frequency points in the sliding window according to the information of the sliding window, moving the sliding window according to the information of the sliding window, and traversing system bandwidth to obtain the channels of the data frequency points in the system bandwidth. In the embodiment, through estimating the channels of all the data frequency points in the system bandwidth by using the sliding window, under the condition that the operational complexity is not increased, the channel estimating performance is promoted effectively.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a channel estimation method and device based on a sliding window. Background technique [0002] The main idea of ​​OFDM (Orthogonal Frequency Division Multiplexing) technology is: divide the channel into several orthogonal sub-channels, convert high-speed data signals into parallel low-speed sub-data streams, and modulate them on each sub-channel to transfer. Wherein, the orthogonal signals can be separated by adopting correlation technology at the receiving end, so that the mutual interference ICI (Inter Channel Interference, inter-channel interference) between the sub-channels can be reduced. Since the signal bandwidth on each sub-channel is smaller than the correlation bandwidth of the channel, it can be regarded as flat fading on each sub-channel, so that the interference between symbols can be eliminated. [0003] During the evolution to B3G / 4G (the last thre...

Claims

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Application Information

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IPC IPC(8): H04L25/02H04L27/26
Inventor 王双赵伟马卫国刘龙伍晓波王仙朋
Owner DATANG MOBILE COMM EQUIP CO LTD
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