Interference cancellation device and method based on cascade digital control method

Abstract

The invention discloses an interference cancellation device and method based on a cascade digital control method. The device comprises a digital radio frequency storage subsystem, a digital control analog cancellation subsystem and a digital control digital cancellation subsystem. The input end of the digital radio frequency storage subsystem receives the co-location interference signal, digitalizes the co-location interference signal, estimates a system delay matching error, and performs delay matching processing; the digital control analog cancellation subsystem and the digital control digital cancellation subsystem form a two-stage cascade cancellation processing mode for the co-site interference signals to suppress the co-site interference signals. The cancellation method comprises thefollowing steps: initializing a system; enabling the delay matching control unit to estimate a system delay matching error and perform delay matching processing; performing two-stage interference cancellation processing on the co-location interference signal; outputting the cancelled signal to an interfered receiver through a third radio frequency transmitting link, and finally suppressing the co-located interference signal.

Description

technical field [0001] The invention relates to the field of electromagnetic compatibility, in particular to an interference cancellation device and method based on a cascade digital control method. Background technique [0002] At present, modern military platforms such as ships, aircraft, satellites, and vehicles are usually densely deployed with multiple and multi-type radio frequency transceivers; such radio frequency transceivers are usually used for communication stations, data links, radars, navigation and positioning system, electronic warfare equipment, identification friend or foe system and detection equipment, etc. [0003] Among them, the electromagnetic energy emitted by the RF transmitter in the RF transceiver is often coupled to the RF receiver in the same platform through radiation and conduction, forming interference to the RF receiver, which is called co-site interference or Self-interference and co-location interference degrade or even invalidate the per...

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Problems solved by technology

[0011] For above-mentioned deficiencies in the prior art, the object of the present invention is to provide a kind of interference cancellation device and method based on the cascaded digital control method, digital radio frequency storage technology is introduced into the interference cancellation system, and the interference source signal (i.e. reference signal) Digitalization has been carried out to solve the problem that the interference cancellation system is limited by the inability to intervene in the digital baseband part of the transmitter; the digital control analog cancellation sub-system and the digital control digital cancellation sub-system are used to perform two-stage cascade cancellation of co-site interference processing to achieve fast and deep cancellation of broadband co-location interference

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