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Method and device for channel prediction

A channel prediction and channel estimation technology, applied in baseband system components and other directions, can solve the problems of large signaling feedback load, large number of channel estimation results, and increased storage length and algorithm complexity.

Active Publication Date: 2009-12-02
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology

[0006] The characteristic of the above-mentioned existing channel prediction algorithm is that all the processing of channel prediction is carried out at the sending end, which leads to the following disadvantages in the existing channel prediction algorithm: on the one hand, due to the need to store a large number of channel estimation results at the sending end, it increases the The length of storage and the complexity of the algorithm; on the other hand, due to the large number of channel estimation results that need to be transmitted, the load of signaling feedback is huge

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  • Method and device for channel prediction

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Embodiment 1

[0051] Figure 4 It is a flowchart of Embodiment 1 of the method of the present invention. Such as Figure 4 As shown, Embodiment 1 mainly includes:

[0052] Step 401, the sending end uses the Wiener smoothing method to perform smoothing filtering on the historical sample values ​​y(t), y(t-Δt), ..., y(t-(N-1)Δt) obtained by the channel estimation , to obtain the sample value after smoothing and filtering y ~ ( t | t ) , y ~ ( t - Δt | t ) , · · · · · · , y ~ ( t - ( M - 1 ) ...

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Abstract

The invention discloses a method and a device for channel prediction. The method comprises the following steps: a receiving terminal carries out smooth filtering on a history sample value of channel estimation to obtain a sample value after smooth filtering; the receiving terminal feeds back the sample value after smooth filtering to a transmitting terminal via a feedback channel; the transmitting terminal carries out channel prediction according to the sample value after smooth filtering to obtain a channel prediction result of L step. In the invention, noise reduction processing is carried out on the result of channel estimation by smooth filtering; on one hand, the statistical property of a receiving signal is further smoothened and the accuracy of channel prediction is effectively enhanced; on the other hand, the quantity of data transmitted on the feedback channel is reduced, thereby reducing the load of the feedback channel and the calculation quantity of the transmitting terminal.

Description

technical field [0001] The present invention relates to mobile communication technology, in particular to a channel prediction method and device. Background technique [0002] In order to improve the spectrum utilization of the system more effectively, a variety of adaptive technologies are used in the existing adaptive communication system, such as Adaptive Modulation and Coding (AMC), power control, dynamic resource allocation, and Multiple Input Multiple Output (MIMO ) precoding and other techniques, all of which require corresponding current channel state information (CSI). Using the state information of the current channel, on the one hand, the transmission capability of the current channel can be fully exploited through the link adaptive technology; on the other hand, the multi-user scheduling gain can be further obtained through the adaptive multi-user resource allocation. Usually, channel state information is obtained through feedback from the receiving end. Due to...

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Application Information

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IPC IPC(8): H04L25/02
Inventor 赵锐孙韶辉
Owner DATANG MOBILE COMM EQUIP CO LTD