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Channel estimation method under high-speed mobile environment

A channel estimation, high-speed mobile technology, applied in the field of channel estimation, can solve problems such as low estimation accuracy

Inactive Publication Date: 2011-09-14
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of low estimation accuracy of the existing channel estimation method in the high-speed mobile environment, and propose a channel estimation method in the high-speed mobile environment with high estimation accuracy

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  • Channel estimation method under high-speed mobile environment

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Embodiment Construction

[0027] The method of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0028] In this embodiment, a channel estimation method in a high-speed mobile environment is provided. Here, the wireless mobile communication system under the high-speed mobile speed environment is in the macro-cellular environment, and the propagation medium in the wireless signal propagation channel is isotropic in scattering of the wireless signal.

[0029] Here, the uplink system of the future wireless mobile communication system Long Term Evolution (LTE, Long Term Evolution) is used as the wireless mobile communication system in the embodiment of the present invention. The specific parameters of the LTE uplink system in the embodiment are shown in Table 1, wherein QAM (Quadrature Amplitude Modulation) means quadrature amplitude modulation.

[0030] Table 1

[0031] The number of all subcarriers N

2048

...

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Abstract

The invention discloses a channel estimation method under a high-speed mobile environment, and is characterized in that a channel estimation method based on a base extension model is utilized to obtain channel estimation values at pilot frequency character positions; then optimal time-domain interpolation coefficients at the pilot frequency character positions corresponding to the channel estimation method based on the base extension model are calculated; and finally the obtained channel estimation values at the pilot frequency character positions multiplies the obtained optimal time-domain interpolation coefficients to obtain channel estimation values at data character positions. In the method, the exact channel estimation values at the pilot frequency character positions are combined with the optimal time-domain interpolation coefficients by the calculation so as to exactly estimate the channel estimation values at the data character position under the high-speed mobile environment,thus the channel estimation accuracy is obviously improved by using the channel estimation method provided by the invention under the high-speed mobile environment compared with an existing channel estimation method. The channel estimation method provided by the invention is applied to carrying out the channel estimation on wireless mobile communication systems using starlike pilot frequency patterns or block pilot frequency patterns frame signals under the high-speed mobile environment.

Description

technical field [0001] The invention relates to the field of wireless mobile communication, in particular to a channel estimation method therein. Background technique [0002] With the vigorous construction of high-speed railways around the world, the normal communication of wireless mobile communication technology in a high-speed mobile environment (120 km / h, 350 km / h or higher) is an urgent problem to be solved, and it is suitable for this high-speed mobile environment. The high-precision channel estimation method is a difficult problem to be solved urgently. In order to improve the transmission rate and spectrum utilization rate of the wireless mobile communication system, users will be allocated a certain number of subcarriers among all the subcarriers in the frame signal of the wireless mobile communication system for communication. At present, the research on channel estimation methods under different mobile speed environments mainly focuses on the channel estimation ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02
Inventor 钟科雷霞李少谦
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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