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Channel estimation device and channel estimation method of nonideal synchronous single-carrier frequency division multiple access system

A single-carrier frequency division and channel estimation technology, applied in baseband system components and other directions, which can solve the problems of time-frequency offset sensitivity and complex channel estimation algorithm.

Inactive Publication Date: 2011-04-27
ZTE CORP
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Problems solved by technology

[0004] In view of the above analysis, the present invention aims to provide a channel estimation device and method for a non-ideal synchronous single-carrier frequency division multiple access system to solve the problems in the prior art that the channel estimation algorithm is complex and sensitive to time-frequency offset

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  • Channel estimation device and channel estimation method of nonideal synchronous single-carrier frequency division multiple access system
  • Channel estimation device and channel estimation method of nonideal synchronous single-carrier frequency division multiple access system
  • Channel estimation device and channel estimation method of nonideal synchronous single-carrier frequency division multiple access system

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Embodiment Construction

[0055] The purpose of the present invention is to realize a channel estimation method and device that is simple to implement, flexible in design and insensitive to time-frequency offset, taking full account of the impact of time-frequency offset on channel estimation from the system point of view.

[0056] Preferred embodiments of the present invention will be specifically described below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the application and are used together with the embodiments of the present invention to explain the principles of the present invention. For the sake of clarity and simplicity, detailed descriptions of known functions and constructions in the devices described herein will be omitted when it may obscure the subject matter of the present invention.

[0057] first combined with figure 1 to attach Figure 4 The device described in the embodiment of the present invention will be described in detai...

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Abstract

The invention discloses a channel estimation device and a channel estimation method of a nonideal synchronous single-carrier frequency division multiple access system. The channel estimation method comprises the following steps of: converting a received time domain base band signal into frequency domain data by a time domain signal processing unit, separating data of each user from the frequency domain data and outputting; acquiring a pilot frequency character in the user data from the user data by a pilot frequency position processing unit, and estimating the channel at a pilot frequency position by utilizing the pilot frequency character in the user data to obtain a channel estimation value of the pilot frequency position; carrying out time bias estimation compensation, noise reduction, filtering and time bias recovery on the channel estimation value of the pilot frequency position, then carrying out frequency bias estimation and initial phase difference compensations and outputting to the channel estimation unit of the data position; and estimating the channel estimation value of the user data by a data position processing unit according to the channel estimation value of the pilot frequency position, wherein the channel estimation value of the pilot frequency position is received from the pilot frequency position processing unit. The invention overcomes the defects of high complexity and sensitivity to time frequency bias of the traditional channel estimation algorithm.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a channel estimation device and method for a non-ideal synchronous single carrier frequency division multiple access system. Background technique [0002] SC-FDMA (Single Carrier-Frequency Division Multiplex Access, single carrier frequency division multiple access) technology has a lower PAPR (Peak Average Power Ratio, peak-to-average power ratio) and achieves OFDM (Orthogonal Frequency Division Multiplexing, orthogonal frequency division Multiplexing) technology has comparable performance, so it has been applied in the 3G LTE (Long Term Evolution, long-term evolution) system. However, in order to fully realize the improvement of system performance brought by SC-FDMA technology, research on related key technologies is still required, and channel estimation technology is one of them. [0003] Most of the existing patent documents on channel estimation only provide channel...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02
Inventor 梁弟标刘东贾文娟卫瑞平
Owner ZTE CORP
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