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Method and device for eliminating narrow-band interference in communication system

A narrow-band interference and communication system technology, applied in the field of communication, can solve problems such as interference, relatively large computational requirements, and spectrum elimination defects, and achieve the effects of reducing real-time processing requirements, reducing computational costs, and reducing occupation.

Active Publication Date: 2010-09-08
ZTE CORP
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0010] However, this method has defects in spectrum elimination, because the use of rectangular window truncation introduces spectrum expansion, and the discrete Fourier transform of non-periodic signals makes the interference diffuse in the entire spectrum space; Normal signals are compressed in the front and rear parts of the data segment, which also affects the signal quality
[0011] In addition, the above methods have certain difficulties in the real-time implementation of hardware, because each data sample point must be processed and operated during processing, and it is necessary to continuously perform spectrum estimation and limit the power spectrum within a certain range. For high-speed broadband system data, the demand for computing power is relatively large

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  • Method and device for eliminating narrow-band interference in communication system
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  • Method and device for eliminating narrow-band interference in communication system

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Embodiment Construction

[0037] Hereinafter, a method and device for eliminating narrowband interference in a communication system of the present invention will be described in detail with reference to FIGS. 1 to 6 .

[0038] Describe in detail the method for eliminating narrowband interference in a communication system of the present invention, the method includes the following steps:

[0039] Step 100: After performing windowing transformation and fast Fourier transform (FFT) transformation on the sampling signal including predetermined point (for example N) length, calculate the signal energy of each point respectively, and respectively accumulate the signal energy of each point, when the accumulation reaches the predetermined When the time is reached, each accumulated value is output.

[0040] Wherein, in the embodiment of the present invention, the bandwidth of the spread spectrum signal in the embodiment is 1.2288MHz, and the data sampling rate is 2×1.2288MHz. 3) = 81.92 points, which is the FF...

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Abstract

This invention provides a method and a device for eliminating narrow band interference in a communication system, in which, the method includes: A, carrying out windowed transformation and fast Fourier transformation FFT to sampled signals of the first length containing N points and then computing signal energy of each point and accumulating the energies, B, comparing the accumulated value with apreset target value when reaching to preset time and recording the signal position information corresponding to the accumulated value of the target value, C, adjusting the signal amplitude of the position in conformity with the target value and then outputting it after IFFT.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a method and device for eliminating narrowband interference in a communication system. Background technique [0002] In the communication system, the spread spectrum communication system is more and more popular in today's world, and the spread spectrum communication technology is becoming more and more mature. The inherent spread spectrum gain of spread spectrum technology makes the spread spectrum communication system have stronger anti-interference ability than other communication systems. When the bandwidth of the interference signal is smaller than the bandwidth of the spreading code itself, the interference signal will spread to the entire frequency band after despreading at the receiving site, thereby reducing the impact of interference. Therefore, the spread spectrum signal can weaken the narrowband interference to a certain extent, and the degree of weakening is r...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/707H04L27/00H04B1/71
Inventor 金辉毕文仲
Owner ZTE CORP