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Method and arrangement in wireless communications system

A wireless communication system and frequency domain channel technology, applied in the field of frequency domain channel estimation, can solve problems such as mutual discrimination, and achieve the effects of improving accuracy, reducing computational complexity, and maintaining computational complexity

Inactive Publication Date: 2013-09-04
ERICSSON (CHINA) COMMUNICATION COMPANY LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Thus, the unwanted noise and the useful channel power that has leaked out in the time domain will be mixed, and a conventional DFT-based estimation scheme will remove not only the noise, but also some of the useful leaked power, since there is no way to combine them distinguish each other

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  • Method and arrangement in wireless communications system
  • Method and arrangement in wireless communications system
  • Method and arrangement in wireless communications system

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Embodiment Construction

[0015] Hereinafter, the present invention will be described in more detail with reference to certain embodiments and drawings. For purposes of explanation and not limitation, specific details such as particular situations, techniques, etc. are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details.

[0016] Furthermore, those skilled in the art will appreciate that the functions and components described herein below can be implemented using software functioning in conjunction with a programmed microprocessor or general purpose computer and / or using application specific integrated circuits (ASICs). It will also be appreciated that although the invention has been described primarily in the form of methods and apparatus, the invention can also be implemented in a computer program product and in a...

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Abstract

The present invention relates to a receiving node, and to a related method of adjusting a frequency domain channel estimate in a receiving node of a wireless communication system using Orthogonal Frequency Division Multiplexing. The method comprises estimating (210) a phase rotation of the frequency domain channel estimate, and compensating (220) for the estimated phase rotation in the frequency domain channel estimate. It also comprises transforming (230) the compensated frequency domain channel estimate into a time domain channel estimate, filtering (240) the time domain channel estimate to suppress noise, transforming (250) the filtered time domain channel estimate back into a noise suppressed frequency domain channel estimate, and adding (260) the estimated phase rotation in the noise suppressed frequency domain channel estimate to achieve an adjusted and improved frequency domain channel estimate.

Description

technical field [0001] The present invention relates to frequency domain channel estimation. More specifically, the present invention relates to a receiving node and a method of adjusting frequency domain channel estimates in a receiving node of a wireless communication system using Orthogonal Frequency Division Multiplexing. Background technique [0002] The Universal Mobile Telecommunications System (UMTS) is one of the third generation mobile communication technologies designed to succeed the Global System for Mobile Communications (GSM). 3GPP Long Term Evolution (LTE) is a project within the 3rd Generation Partnership Project (3GPP) to improve the UMTS standard for the future in terms of improved services such as higher data rates, increased efficiency and reduced costs Require. The Universal Terrestrial Radio Access Network (UTRAN) is the radio access network of the UMTS, and the Evolved UTRAN (E-UTRAN) is the radio access network of the LTE system. In E-UTRAN, a Use...

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Application Information

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IPC IPC(8): H04L27/26
CPCH04L5/0023H04L25/0204H04L25/0212H04L25/022H04L27/2647H04L25/0232H04B1/12
Inventor 郭志恒王亥张瑞齐
Owner ERICSSON (CHINA) COMMUNICATION COMPANY LTD