Interference rejection method, device and receiver

Abstract

The invention relates to the communication technical field, and discloses an interference suppression method and a device embodiment. The method includes the following steps that: interference characteristic data of an interference digital signal is acquired, according to an interference detection threshold corresponding to the current interference digital signal which is waiting for processing; an interference suppression processing is performed to the interference digital signal, according to the acquired interference characteristic data. The device comprise an interference detection unit which is used for acquiring the interference characteristic data of the interference digital signal according to the interference detection threshold corresponding to the current interference digital signal which is waiting for processing; and an interference suppression unit which does the interference suppression processing to the interference digital signal according to the interference characteristic data. The invention also discloses an embodiment of a receiver. The embodiment of the invention can improve the accuracy of the interference detection, thereby improving the effect of the interference suppression.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to an interference suppression method, device and receiver. Background technique [0002] Base stations of spread spectrum broadband systems such as Code-Division Multiple Access (CDMA for short), Wideband CDMA (WCDMA for short), and Time Division Multiplexing-Synchronous Code Division Multiple Access (TD-SCDMA for short) The uplink channel of the physical layer is likely to cause narrowband interference due to factors such as co-frequency or intermodulation during air interface transmission. The typical scenario is that the frequency of the uplink channel is low. The signal is easy to generate a high-amplitude pulse in the frequency domain of the uplink channel, which seriously affects the uplink demodulation of the base station. Therefore, anti-interference technology is generally used before uplink demodulation. [0003] A narrow-band anti-interference technology is provi...

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Problems solved by technology

[0004] In the process of realizing the present invention, the inventors found that the existing technical solutions have at least the following problems: when using the interference suppression function to filter out the narrow-band interference in the signal, it is necessary to first detect the interference point and obtain the interference characteristic data; among them, When detecting interference points, a fixed threshold value is simply used to judge the interference level of sampling points; this scheme can better realize interference detection when the signal strength is relatively stable, but in practice, The strength of the background noise signal often changes. At this time, if a fixed threshold value is still used for interference detection, its accuracy will be greatly reduced, and the effect of interference suppression will be reduced accordingly.

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