Signal interference canceller and signal interference canceling method

A signal interference and electrical signal technology, applied in electromagnetic wave transmission system, transmission noise suppression, electrical components, etc., can solve the problems of poor anti-electromagnetic interference, increased difficulty, large volume, etc., and achieve strong anti-electromagnetic interference and high output amplitude Continuously adjustable effect

Inactive Publication Date: 2009-04-08
桂林航天光比特科技股份公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the delayed transmission of the obtained interference electrical signal directly through the microstrip line, there are deficiencies in the transmission process: large loss, low delay accuracy, poor anti-electromagnetic interference, large volume, heavy weight, small bandwidth, poor adjustability, etc. Inherent shortcomings limit the development

Method used

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  • Signal interference canceller and signal interference canceling method
  • Signal interference canceller and signal interference canceling method
  • Signal interference canceller and signal interference canceling method

Examples

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[0044] figure 1 It is a schematic diagram of a preferred signal interference canceller of the present invention, which includes a main channel, a delay branch and a cancellation module. At least two radio frequency electrical signals transmitted from different radio stations are received through an antenna, and these radio frequency electrical signals enter the receiving end of the signal interference canceller at the same time. The receiving end of the canceller includes an active induction influence receiving module, which can select out the signals that the user does not need. Different active induction influence receiving modules can sense electrical signals of different frequencies and use them as the radio frequency to be delayed. The electrical signals are sent to different delay branches respectively. The uninduced signal is transmitted into the main channel as a radio frequency electrical signal to be processed, and is directly sent to the canceller through the cable.

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Abstract

The invention discloses a signal interference canceller and a signal interference cancelling method. The signal interference canceller converts an electric interference signal into an optical modulation signal and then transmits the signal to an optical delay line for changing the corresponding optical length passed by the optical signal, so as to realize the delaying of the optical signal and finally converts the optical signal to an electric signal, thereby realizing to transfer the phase of a RF electric signal by (2n+1)180 degrees; wherein, n is equal to 0, 1, 2, 3, and the like; finally the interference signal which affects useful signals is filtered by cancelling. The invention can effectively remove useless signals received by a receiving terminal during the process of multi-carrier transmission; moreover, the invention is characterized by high delaying precision and high electromagnetic interference resistance.

Description

(1) Technical field [0001] The invention relates to a radio signal receiving system, in particular to a signal interference canceller and a signal interference cancel method. (2) Background technology [0002] In the field of wireless communication, in order to improve the communication capacity, multiple radio stations are usually placed in one place, each radio station transmits a different wireless carrier, and a specific signal receiving end often only needs to receive multiple carrier signals One of the carrier signals is a useful signal, so the signals carried by other carriers can be regarded as "interference" signals for the useful signal to be received. Therefore, how to effectively filter out these "interferences" is a key problem to be solved by the multi-carrier receiving end. In the prior art, an interference canceller is usually used to suppress "interference" signals outside the useful signal bandwidth at the receiving end. The purpose of the so-called inter...

Claims

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Application Information

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IPC IPC(8): H04B1/10H04B10/158H04B15/00
Inventor 苏磊
Owner 桂林航天光比特科技股份公司
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