Narrowband Interference Suppression Method and Device
A narrow-band interference and suppression device technology, which is applied in the field of spread spectrum communication, can solve problems such as complex circuit implementation, damage to spread spectrum signals, and incomplete suppression of narrow-band interference, and achieve simple circuit implementation and good prediction effects
Active Publication Date: 2020-04-24
HUNAN GOKE MICROELECTRONICS
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[0004] The purpose of the embodiments of the present invention is to provide a narrowband interference suppression method and device to solve the problems of incomplete narrowband interference suppression, damage to spread spectrum signals, and complicated circuit implementation in the prior art
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[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.
[0018] It should be noted that like numerals and let...
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The invention provides a narrowband interference suppression method and device and relates to the technical field of spread spectrum communication. The method comprises the steps of carrying out narrowband interference detection on an input signal, thereby obtaining a narrowband interference frequency; computing a narrowband interference prediction signal according to a current predicted weight value and the narrowband interference frequency; carrying out narrowband interference suppression on the input signal according to the narrowband interference prediction signal; and computing a next predicted weight value according to the narrowband interference prediction signal, the input signal, the current predicted weight value and the narrowband interference frequency, thereby recomputing thenarrowband interference prediction signal by taking the next predicted weight value as the current predicted weight value when next narrowband interference suppression is carried out. Only a frequencyof a narrowband interference source is detected in a frequency domain and notch processing and inverse FFT do not need to be carried out, so a spread spectrum signal is not damaged, and circuit realization is simple. According to the method and the device, the narrowband interference prediction signal is obtained according to the current predicted weight value and the narrowband interference frequency and does not comprise the spread spectrum signal, so the narrowband interference suppression is relatively thorough.
Description
technical field [0001] The present invention relates to the technical field of spread spectrum communication, in particular to a narrowband interference suppression method and device. Background technique [0002] Existing narrowband interference suppression technologies include time domain technology and frequency domain technology. Time domain technology uses the difference in correlation (predictability) between spread spectrum signals and narrowband interference signals to predict narrowband interference signals, and through The time-domain subtraction removes the narrow-band interference signal, the most commonly used is the adaptive filter, the principle of the traditional adaptive filter is as follows figure 1 As shown, the main input signal S(n+1) (including the spread spectrum signal S1(n+1) and the narrowband interference signal S2(n+1)) is regarded as the input signal X(n) of the adaptive filter, and As the desired signal d(n+1), since the spread spectrum signal ...
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IPC IPC(8): H04B1/71
CPCH04B1/71
Inventor 陶长来
Owner HUNAN GOKE MICROELECTRONICS