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Method and device for post-treatment of TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) channel estimation

A technology of TD-SCDMA and channel estimation, applied in the post-processing field of TD-SCDMA channel estimation, to achieve the effect of reducing noise components

Inactive Publication Date: 2014-06-25
津亚高科智能设备(上海)有限公司
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to reduce the noise component in the estimated channel and improve the accuracy of channel estimation

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  • Method and device for post-treatment of TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) channel estimation
  • Method and device for post-treatment of TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) channel estimation
  • Method and device for post-treatment of TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) channel estimation

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Embodiment Construction

[0029] In most mobile communication systems, baseband processing is usually digital processing. Due to the extensive use of pulse shaping filters in mobile communication systems, the sampling rate of the baseband signal is usually the chip rate, which is called double-rate sampling. In the following analysis, the signals in the built wireless mobile communication system model are all digital signals sampled at a multiple rate.

[0030] Define the actual digital channel impulse response window as:

[0031] H=[h 0 , h 1 ,..., h W-1 ] (1)

[0032] In formula (1): H is the complex channel impulse response window; W is the window length of the complex channel impulse response window, that is, the number of sampling points; h k is the value of the kth sampling point in the complex channel impulse response window, 0≤k≤W-1.

[0033] figure 1 It is a simple wireless mobile communication system model.

[0034] When the channel estimation algorithm is a linear algorithm or an ...

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Abstract

The invention discloses a method for post-treatment of TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) channel estimation. The method comprises the following steps of pretreating a channel estimation result, selecting Z paths with received signal power being more than a threshold Pth, filtering the path with the received signal power being less than the threshold Pth, wherein Z is less than the maximum number of the path; superimposing pretreated sub-frame channel estimation results output by the selected Z paths, obtaining the superimposed output value of the current sub-frame channel results; and obtaining the final post-treatment result of the current sub-frame channel estimation according to the superimposed output value of the current sub-frame channel results. The invention further discloses a device for post-treatment of the TD-SCDMA channel estimation. The method and the device provided by the invention can be used for reducing the noise components in the estimated channel and improving the precision of the channel estimation.

Description

technical field [0001] The invention relates to wireless communication technology, in particular to a TD-SCDMA channel estimation post-processing method and device. Background technique [0002] In wireless mobile communication, most receiving algorithms need to obtain wireless mobile channel model for channel equalization and multi-user demodulation. Usually, the wireless mobile channel is a time-varying channel. In the low-chip-rate time-division duplex mode defined by the Third Generation Partnership for Mobile Communications (3GPP), the wireless mobile channel can be regarded as a time-varying frequency-selective multipath channel. . In this working mode, shorter burst pulses are used for communication. Within one pulse period, the wireless mobile channel can be approximately regarded as a linear time-invariant channel, and the channel estimation can be realized by using the training sequence. In this mode, the mode of inserting the training sequence (Midamble) in the ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02
Inventor 汤德明沈润姚骏刘金东
Owner 津亚高科智能设备(上海)有限公司
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