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Method and device for channel estimation

A channel estimation and channel correlation technology, applied in baseband system components and other directions, can solve problems such as poor channel estimation robustness

Active Publication Date: 2013-06-19
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology

[0029] The square spectrum or evenly distributed spectrum is simple to implement, but in a non-ideal environment, because the spectrum type cannot match the actual situation well, the robustness of channel estimation is not good.
[0030] However, the determination of the parameters of the exponential spectrum brings additional complexity. The channel estimation method based on the exponential spectrum is similar to the steps of the square spectrum. It can't match the actual situation very well, so the robustness of its channel estimation is not good.

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Embodiment Construction

[0045] The embodiment of the present invention provides a channel estimation method and device. When determining channel-related information, the power delay spectrum shape is based on: the time domain response is a constant value before the preset intermediate baseband time sampling point, After the intermediate baseband time sampling point, the time domain response decays with the baseband time; and then channel estimation is performed through the channel related information. Since the used power delay profile has an attenuation process and can better match the actual situation, using the power delay profile for channel estimation improves the robustness of channel estimation.

[0046] Such as figure 1 As shown, the channel estimation method provided by the embodiment of the present invention includes:

[0047] Step S101: Determine channel-related information according to the power delay spectrum. The power delay spectrum profile is specifically: the time domain response is a co...

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Abstract

The invention discloses a method and a device for channel estimation, and relates to communication technology. When channel relevant information is determined, a based power delay spectrum shape is characterized in that time domain response is a constant value before a preset middle base band time sampling point, time domain response is decayed along base band time after the middle base band time sampling point, and then channel estimation is carried out through the channel relevant information. Due to the fact that a used power delay spectrum has a decay process, actual conditions can be matched well, and robustness of channel estimation by using the power delay spectrum for channel estimation is improved.

Description

Technical field [0001] The present invention relates to communication technology, in particular to a channel estimation method and device. Background technique [0002] From the second generation (2G) to the third generation (3G) and the fourth generation (4G) cellular mobile communication systems, the complexity of the system is gradually increasing, and the requirements for the physical layer processing capabilities of the base station and the terminal are also gradually increasing. , Especially in the quasi-4G system represented by the Long Term Evolution (LTE) system, the ability to use optimized physical layer processing algorithms under the premise of ensuring performance is great for enhancing the competitiveness of products Helping. [0003] OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) technology has become the mainstream technology in the current long-term evolution system, and MMSE (Minimum Mean Square Error) channel estim...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02
Inventor 戴晓明黄琛唐胜志
Owner DATANG MOBILE COMM EQUIP CO LTD