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Method and device for suppressing narrowband interference of baseband signals

A baseband signal, narrowband interference technology, applied in electrical components, transmission systems, etc., can solve the problem of not being able to achieve the best narrowband interference suppression capability.

Active Publication Date: 2010-02-17
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology

[0007] The disadvantage of the existing technology is that: when all frequency points of the received signal are treated equally according to the existing technology, that is, the method of using the same threshold to filter out narrow-band interference cannot make the narrow-band interference suppression capability of the system optimal

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  • Method and device for suppressing narrowband interference of baseband signals
  • Method and device for suppressing narrowband interference of baseband signals
  • Method and device for suppressing narrowband interference of baseband signals

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Embodiment Construction

[0066] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0067] Because the mobile communication channel is a typical band-limited channel, in order to suppress the intersymbol interference, the mobile communication system adopts the pulse shaping filter at the receiving end. After the received signal passes through the received pulse shaping filter, the frequency signal of the received signal can be divided into the frequency point signal in the passband of the pulse shaping filter, the frequency point signal in the transition band and the frequency point signal in the transition band according to the frequency response characteristics of the pulse shaping filter. The frequency point signal in the stop band. However, the signal strengths of frequency points in different segments are very different. Based on this, the present invention proposes a narrow-band interference suppression scheme suitable for baseba...

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Abstract

The invention discloses a method and a device for suppressing narrowband interference of baseband signals. The method comprises the following steps: acquiring the baseband signals of received signals after passing through a pulse shaping filter; carrying out fast Fourier transform for the baseband signals to acquire frequency domain signals of the received signals; filtering frequency point signals in a pass band, a transition band and a stop band of the pulse shaping filter in the frequency domain signals according to the frequency response chrematistics of the pulse shaping filter respectively; and carrying out inverse fast Fourier transform for the filtered frequency domain signals to acquire the baseband signals of the received signals. Compared with the narrowband interference suppression algorithm which adopts an identical threshold and an identical processing method in the prior art, the method and the device after implementation can improve the narrowband interference suppression capacity of a communication system.

Description

technical field [0001] The invention relates to communication interference suppression technology, in particular to a method and device for suppressing narrow-band interference of baseband signals. Background technique [0002] DSSS (Direct Sequence Spread Spectrum, Direct Sequence Spread Spectrum) system is one of the main forms of spread spectrum technology in practical applications. Not only has strong anti-interference performance, good communication confidentiality, but also relatively simple engineering implementation, so it is widely used in military fields, satellite communications and digital mobile communication systems. With the rapid development of electronic technology, spectrum resources are increasingly scarce, and the electromagnetic environment in the air is also deteriorating, which puts forward higher requirements for the anti-jamming performance of DSSS systems. Especially in the field of future military struggles, the enemy's malicious strong narrowband...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/707H04B1/10H04B1/71
Inventor 陈永倩孙建勋裴亚丽
Owner DATANG MOBILE COMM EQUIP CO LTD
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