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Narrow-band interference rejection method and its device

A narrow-band interference and in-band signal technology, applied in the field of narrow-band interference suppression methods and devices, can solve problems such as inaccurate narrow-band interference judgments, achieve simple and easy algorithm implementation, reduce the probability of missed judgments and misjudgments, and reduce misjudgments The effect of the probability of

Inactive Publication Date: 2007-02-07
HUAWEI TECH CO LTD
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Problems solved by technology

[0009] The present invention provides a narrowband interference suppression method to solve the problem of inaccurate judgment of narrowband interference existing in the prior art

Method used

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  • Narrow-band interference rejection method and its device
  • Narrow-band interference rejection method and its device
  • Narrow-band interference rejection method and its device

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Embodiment Construction

[0052] The basic idea of ​​the method for suppressing narrowband interference in the frequency domain provided by the present invention is: first sample a group of received signals and perform windowing processing, and then perform time / frequency transformation on the processed data blocks; domain data to perform threshold judgment (the threshold is the median threshold, which is obtained by estimating the interference and signal spectrum) and the processing of eliminating interference; after frequency / time conversion and window compensation processing, the signal that eliminates or suppresses narrow-band interference is obtained .

[0053] The specific implementation steps of the frequency domain-based narrowband interference suppression method of the present invention include:

[0054]Step 1. Convert the serial data stream into N-point (the number of FFT) parallel data through a buffer (Buffer), and complete overlap preservation at the same time, so that in step 5, the frequ...

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Abstract

The invention relates to a narrow-band interference restrain method, which comprises: sampling the signal, and converting the sampled time domain signal into frequency domain signal; obtaining the middle value of said frequency domain, and damping the signal that higher than middle threshold value; converting the processed frequency domain signal into time domain signal, and recovering the signal. And the invention also discloses a device which comprises: a signal sample module, a time / frequency convert module, a narrow-band interference processing module, a frequency / time convert module and a signal reducing module; the narrow-band interference processing module obtains the middle value of frequency domain signal obtained by time / frequency conversation, and damps the signal higher than said middle threshold value, and obtain the signal that damp the narrow-band interference via frequency / time conversation and reduction. The invention can effectively restrain the narrow-band interference of signal.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a narrowband interference suppression method and device. Background technique [0002] At present, in the 3G (3rd Generation, third generation) mobile communication system, the direct spread CDMA (Code Division Multiple Addressing, Code Division Multiple Access) system has been widely used, and the direct spread CDMA system directly converts the frequency spectrum of the data sequence to Extended to a bandwidth spectrum that is much wider than required, this processing method by spreading the spectrum can suppress narrow-band interference to a certain extent. However, when the narrow-band interference signal is strong enough that it cannot be suppressed by direct spread spectrum, it is necessary to pre-process the received signal through a narrow-band interference suppression device. [0003] Narrowband interference suppression devices in the prior art are mainly classified i...

Claims

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Application Information

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IPC IPC(8): H04B1/10H04B1/707H04B1/71
Inventor 相里瑜邓杰锋
Owner HUAWEI TECH CO LTD
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