Interference signal suppression circuit and mobile terminal
A technology for interfering signals and suppressing circuits, which is applied in the fields of transmission noise suppression, electrical components, transmission systems, etc., and can solve problems such as difficulty in eliminating communication frequency band interference and sacrificing communication performance.
Inactive Publication Date: 2014-06-11
YULONG COMPUTER TELECOMM SCI (SHENZHEN) CO LTD
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[0007] The invention provides an interference signal suppression circuit and a mobile terminal, which solves the problem that communication performance needs to be sacrificed when suppressing interference signals in the existing scheme, and it is difficult to eliminate interference in the communication frequency band
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[0027] 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 of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0028] In communication systems, intermodulation interference usually occurs in frequency division duplex (FDD) systems. Intermodulation interference signals are mainly the third frequency generated by signals of two different frequencies entering a nonlinear device at the same time. When the signal is within the receiving frequency band of the communication system, it will interfere with the reception. Theoretically, through two signals of diffe...
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The invention discloses an interference signal suppression circuit and a mobile terminal. The interference signal suppression circuit comprises a frequency division module and a control module. One end of the frequency division module serves as a signal input end. The frequency division module is used for filtering out interference signals with the working frequency outside the set working frequency section from input signals according to the set working frequency section. The other end of the frequency division module is used for transmitting the signals with the interference signals filtered out to one end of the control module. The control module is used for controlling the transmission of the signals with the interference signals filtered out through the frequency division module, and the other end of the control module serves as a signal output end. By means of the technical scheme, the problems that according to an existing scheme, the communication performance needs to be sacrificed when the interference signals are suppressed, and the interference produced in a communication frequency band is difficultly eliminated are solved. The interference signals in the input signals are filtered out and the transmission of the signals with the interference signals filtered out are controlled through the frequency division module and the control module, and the interference to the signal receiving in the receiving frequency band of the interference signals is effectively prevented.
Description
technical field [0001] The invention relates to the field of mobile communication, in particular to an interference signal suppression circuit and a mobile terminal. Background technique [0002] With the continuous development of communication technology, a 2G / 3G / 4G hybrid network pattern has been formed, which also means that the requirements for mobile terminals are getting higher and higher. In order to meet the communication quality in the 2G / 3G / 4G networking mode, the mobile terminal needs to integrate communication modules of different standards, and at the same time, it needs to work concurrently with multiple standards in the same mobile terminal. [0003] In the concurrent mode of multi-mode and multi-standby, it becomes one of the main problems of the mobile terminal to solve the interference between each system while working at the same time. In the current technical solution, the following two methods are mainly used to reduce or eliminate the intermodulation i...
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IPC IPC(8): H04B1/40H04B15/00H04B1/525
Inventor 王宇峰伍双杰
Owner YULONG COMPUTER TELECOMM SCI (SHENZHEN) CO LTD