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Channel frequency domain correlation calculation method and device, and channel estimation method and device

A technique of correlation calculation and channel estimation, which is applied in multi-frequency code systems, baseband system components, shaping networks in transmitters/receivers, etc., and can solve problems such as large system delays and large system overheads

Inactive Publication Date: 2014-01-08
FUJITSU LTD
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Problems solved by technology

No matter which method is used, synchronous real-time estimation of channel frequency domain correlation while performing channel estimation requires a lot of calculation and statistics, which will cost a lot of system overhead and cause a large system delay

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  • Channel frequency domain correlation calculation method and device, and channel estimation method and device
  • Channel frequency domain correlation calculation method and device, and channel estimation method and device
  • Channel frequency domain correlation calculation method and device, and channel estimation method and device

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Embodiment Construction

[0068] Exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the interest of clarity and conciseness, not all features of an actual implementation are described in this specification. It should be understood, however, that in developing any such practical embodiment, many implementation-specific decisions must be made in order to achieve the developer's specific goals, such as meeting those system and business-related constraints and Restrictions may vary from implementation to implementation. Moreover, it should also be understood that development work, while potentially complex and time-consuming, would at least be a routine undertaking for those skilled in the art having the benefit of this disclosure.

[0069] Here, it should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only the device structure and / or processing steps closely related to the solu...

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Abstract

The invention discloses a channel frequency domain correlation calculation method, a channel frequency domain correlation calculation device, a channel estimation method and a channel estimation device. The channel frequency domain correlation calculation method provided by the invention comprises the following steps of: analyzing the path delay distribution of a sample channel; analyzing the path energy distribution of the sample channel; constructing a channel model according to the path delay distribution and path energy distribution of the sample channel; and calculating channel frequency domain correlation according to the constructed channel model. The channel estimation method provided by the invention comprises the following steps of: calculating the least square channel estimation of a pilot sub-carrier; reading pre-stored channel frequency domain correlation; estimating the travel speed of a receiver relative to a transmitter; calculating channel time domain correlation according the travel speed of the receiver relative to the transmitter; calculating a minimum mean square error (MMSE) filter coefficient by utilizing the calculated channel time domain correlation and the read channel frequency domain correlation; and acquiring the channel estimation of a data sub-carrier according to the calculated MMSE filter coefficient and the least square channel estimation of the pilot sub-carrier, wherein the pre-stored channel frequency domain correlation is acquired by the channel frequency domain correlation calculation method.

Description

technical field [0001] The present invention relates generally to wireless communications. Specifically, the present invention relates to a channel frequency domain correlation calculation method and its device, and a channel estimation method and its device. Background technique [0002] Affected by surrounding buildings, objects, pedestrians, vehicles, and the ground, wireless signals may be reflected, refracted, diffracted, and scattered during transmission. Therefore, the wireless signals received by the receiving end usually experience severe fading and delay extension. In order to restore the transmitted data, the receiver needs to estimate the wireless channel experienced by the signal, and then compensate for the loss suffered by the received signal. The module that estimates the channel is called the channel estimation module, and the module that compensates the received signal is called the equalization module. The channel estimation module is crucial to the wir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02H04L25/03H04L27/26
Inventor 张磊严闳中王昕
Owner FUJITSU LTD
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