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Narrowband interference eliminating method and apparatus in spread-spectrum system

A narrowband interference and spread spectrum system technology, applied in transmission systems, electrical components, etc., can solve the problem that hardware is not easy to realize in real time, and achieve the effect of obvious narrowband interference suppression, reduced calculation amount, and reduced requirements.

Inactive Publication Date: 2008-03-12
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The technical problem to be solved by the present invention is to improve the second solution in the above-mentioned existing frequency domain cancellation technology, optimize the generation process of the threshold, so that the threshold can maintain a certain stability and can adapt to the change of the channel environment. changes, and overcome the problem that the hardware in the prior art is not easy to implement in real time, reducing the amount of calculation and hardware complexity

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  • Narrowband interference eliminating method and apparatus in spread-spectrum system
  • Narrowband interference eliminating method and apparatus in spread-spectrum system
  • Narrowband interference eliminating method and apparatus in spread-spectrum system

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Embodiment Construction

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0024] FIG. 1 is a schematic diagram of spectrum energy of a general spread spectrum signal, which has been described in detail in the background art, and will not be repeated here.

[0025] Fig. 2 is a schematic diagram of the working of the device of the present invention, in which the part of the device of the present invention is inside the box. FIG. 3 is a schematic diagram of the interference cancellation control unit 180 in FIG. 2 . The present invention will be described below with reference to FIG. 2 and FIG. 3 .

[0026]The signal is received by the radio frequency converter 100, and then sampled by the digital quantizer 110 to become a digital signal, which is input to the interference elimination device 120 of the present invention. The interference elimination device 120 of the present invention includes a data storage unit 130 ...

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Abstract

The invention relates to a method and device for dispelling the selective interference in the spread-spectrum system. The device comprises a data storing unit and a FFT changing unit, an interference dispelling unit, an IFFT changing unit, a choosing unit and an interference dispel controlling unit, wherein the interference dispel controlling unit comprises N energy computing units, N accumulating units, an accumulating count control unit, a min value computing unit, a time average unit, a multiplier, a comparing unit and a position depositing unit which are decided by the min differentiate interference bandwidth. The method dispels the narrow band interfering signal.

Description

technical field [0001] The invention relates to a method and device for eliminating narrowband interference in a wireless communication system, in particular to a method and device for eliminating narrowband interference in a spread spectrum communication system. Background technique [0002] Spread spectrum communication systems are becoming more and more common in today's world. Spread spectrum or pseudo-random code (PN) modulation can reduce interference from other users and wireless signals. When the interference is a narrowband signal, in the process of cross-correlation between the received signal and the PN sequence, the interference signal will spread to the entire frequency band so as to weaken the influence of the interference. Therefore, the spread spectrum signal can weaken the narrowband interference to a certain extent. [0003] A typical frequency spectrum of a spread spectrum signal (for example: spread spectrum by PN sequence) is submerged in noise, as sho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/707H04B1/10H04B1/71H04B1/7107
Inventor 赵盟郁光辉吴岩巍胡留军向际鹰王志坚
Owner ZTE CORP