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Channel estimation method and device

A channel estimation and channel technology, applied in baseband system components, shaping network in transmitter/receiver, etc., can solve problems such as complex calculations, and achieve the effect of improving performance

Inactive Publication Date: 2013-10-23
FUJITSU LTD
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Problems solved by technology

However, even if information such as channel correlation and SNR are obtained, the calculation is more complicated due to the inverse operation of the matrix involved

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  • Channel estimation method and device
  • Channel estimation method and device

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Embodiment Construction

[0025] Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings. In the interest of clarity and conciseness, not all features of an actual implementation are described in this specification. It should be understood, however, that in developing any such practical embodiment, many implementation-specific decisions must be made in order to achieve the developer's specific goals, such as meeting those constraints related to the system and business, and those Restrictions may vary from implementation to implementation. Furthermore, it should also be understood that development work, while potentially complex and time-consuming, would at least be a routine undertaking for those skilled in the art having the benefit of this disclosure.

[0026] Here, it should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only the device structure and / or processing steps closely related to t...

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Abstract

The invention discloses a channel estimation method and device, wherein the channel estimation method includes: a least square (LS) estimation step for calculating an LS estimation value of a channel according to a received channel state indicator-reference signal (CSI-RS); a signal-to-noise ratio estimation step for estimating a signal-to-noise ratio based on the estimated LS estimation value; a channel parameter estimation step for estimating channel parameters related to delay spread of the channel; a smoothing-matrix selection step for selecting a linear minimum mean square error (LMMSE) smoothing-matrix according to the estimated signal-to-noise ratio and the estimated channel parameters; an LMMSE smoothing step for using the selected LMMSE smoothing matrix to carry out LMMSE smoothing filtering on the LS estimation value; and an output step for outputting a filtering result as channel estimation information. According to the channel estimation method and device, relative high channel estimation performance oriented to the CSI-RS can be realized.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, and more particularly, to a channel estimation method and device based on a Channel State Indicator-Reference Signal (CSI-RS) used in a wireless communication system. Background technique [0002] In wireless communication systems, due to its good anti-multipath performance and high spectral efficiency, Orthogonal Frequency Division Multiplexing (OFDM) is adopted by IEEE P802.16m and Universal Mobile Communication System-Long Term Evolution ( 4G and quasi-4G technologies including Universal Mobile Telecommunication System-Long Term Evolution, UMTS-LTE) are adopted as the main transmission technology. In an OFDM system, in order to implement resource scheduling and support link adaptive technology at the receiving end, RS-based channel estimation technology is generally used to track channel changes in time domain and frequency domain. [0003] In the R8 version of LTE, a c...

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Application Information

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IPC IPC(8): H04L25/02H04L25/03
Inventor 严闳中王昕
Owner FUJITSU LTD
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