A Method for Suppressing Range Finder Pulse Interference Applicable to OFDM Receiver

Abstract

The invention discloses a method suitable for an orthogonal frequency division multiplexing receiver to suppress pulse interference of a range finder, and belongs to the technical field of pulse interference suppression. The method preprocesses the oversampled data through oversampling, adopts an interference reconstruction method based on compressed sensing, obtains 64 channels of interference signals, and finally eliminates the interference signals from the received signal, and obtains the desired signal as the receiver interference elimination The output of the module. The invention uses an orthogonal matching tracking algorithm, which has fast operation speed, easy program implementation, and can meet the requirements of real-time processing of interference signals; the invention finds the optimal measurement matrix iteratively, has a high probability of reconstructing interference signals, and can effectively eliminate interference; The compressed sensing algorithm adopted in the invention is based on the adaptive change of signal sparsity, fits the characteristics of actual DME signal generation, and has high reconstruction efficiency.

Description

technical field [0001] The invention relates to a method for suppressing pulse interference, in particular to a method for suppressing pulse interference of a medium-strength rangefinder suitable for an orthogonal frequency division multiplexing receiver. Background technique [0002] In recent years, the air traffic volume has increased sharply, and aviation communications are facing new challenges and requirements in terms of increasing data transmission rates, improving spectrum utilization, and increasing the capacity of aviation communication networks. However, the VHF frequency band (118-136MHZ), which has been widely used in the past 70 years, has become saturated, and it is imminent to design and apply a new generation of aeronautical communication systems. In 2007, the World Radiocommunication Conference organized by the International Telecommunication Union (ITU) adopted a decision to allocate part of the L-band frequency (960MHz~1164MHz) used for aviation radio na...

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Problems solved by technology

[0004] However, the side lobe energy of the rangefinder signal can still interfere with the L-DACS1 system signal, so it is necessary to study effective ways to suppress the interference signal so that the new generation of aviation broadband communication system can be deployed on the aircraft smoothly and safely to meet the data requirements. Transmission rate and aeronautical communication network capacity requirements

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