Compressed sensing PIE (Pulse Interference Elimination) system based on space-frequency coding

Abstract

The invention relates to a compressed sensing PIE system based on space-frequency coding. In a transmitter, a channel encoder, a modulator, an orthogonal converter, a symbol interleaver, a serial-to-parallel converter and a space-frequency encoder are successively connected in series, the space-frequency encoder is connected with two subcarrier mapping devices of the same structure, and each subcarrier mapping device is successively connected with an up sampler, a reverse discrete Fourier transformer, a cyclic prefix adder, a parallel-to-serial converter, a D/A conversion and RF emitter and an emission antenna. A receiver comprises a reception antenna, an RF front-end converter, an A/D converter, a Doppler frequency offset estimator, a Doppler frequency offset compensator, a cyclic prefix remover, a discrete Fourier transformer, a compressed sensing interference eliminator, a frequency-domain down sampler, a channel estimator, a space-frequency decoder, a symbolic solution interleaver, a reverse orthogonal converter and a channel decoder successively in serial connection. The compressed sensing algorithm can be directly utilized to reconstruct pulse signals of a range finder and converts the pulse signals to the frequency domain for elimination, and thus, the pulse signals of the range finder are effectively inhibited.

Description

technical field [0001] The invention relates to an interference suppression method. In particular, it relates to a compressed sensing impulse interference suppression system based on space-frequency coding. Background technique [0002] The L-band digital aviation communication system is an air-to-ground cellular mobile communication system deployed by civil aviation along land routes in the future. The system mainly provides data communication services for air traffic control and airline operation management for aircraft on land routes, terminal areas and airports. It is one of the main technical means of the future aviation mobile communication system of civil aviation. According to the plan of the International Civil Aviation Organization, the L-band digital aviation communication system will be deployed in an embedded manner between the channels of the L-band range finder, occupying a transmission bandwidth of 500KHz. Due to the partial overlap between the rangefinder ...

AI Technical Summary

Problems solved by technology

In practical applications, this method has the following two problems: the location of the pulse interference signal is not easy to determine, and the inter-subcarrier interference is caused after the pulse is extinguished.

In practical application, this method has disadvantages: when the rangefinder int

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