A Carrier Estimation Method for Mapsk

Abstract

The invention discloses a carrier wave estimation method of MAPSK (multiple amplitude phase shift keying). The method comprises the specific steps: determining a benchmark semi-diameter of a benchmark circular ring based on a MAPSK modulation standard constellation diagram, and performing power normalization processing on an acquired MAPSK to-be-estimated carrier frequency signal; screening constellation points in the constellation diagram of the MAPSK to-be-estimated carrier frequency signal after the power normalization processing according to the benchmark semi-diameter of the benchmark circular ring, and performing N power operation on the screened MAPSK to-be-estimated carrier frequency signal, and performing FFT (fast Fourier transformation) solving operation on the N power operation result to obtain an N power frequency spectrum of the MAPSK to-be-estimated carrier frequency signal; and then performing modular operation on the N power frequency spectrum of the MAPSK to-be-estimated carrier frequency signal, wherein the frequency corresponding to the highest spectral line is N times of the carrier wave frequency of the MAPSK to-be-estimated carrier frequency signal, thereby determining the carrier wave frequency of the MAPSK to-be-estimated carrier frequency signal. Through the adoption of the method disclosed by the invention, the condition that the carrier wave estimation error of the MAPSK is great is avoided, and meanwhile, the computation burden is reduced, and the carrier wave estimation precision is increased.

Description

technical field [0001] The invention relates to the field of discrete signal analysis, in particular to a method for MAPSK carrier estimation. Background technique [0002] With the increasing complexity and density of the signal environment, the signal modulation methods tend to be diversified. Communication signals have various modulation modes with different modulation parameters in a wide frequency band. To quickly and efficiently identify these communication signals, it is useful in military and military applications. Civilian fields all have important positive significance. [0003] Since the signal modulation recognition technology mainly studies the frequency domain characteristics of digital signals, accurate carrier estimation plays a vital auxiliary role in the signal modulation recognition technology. Therefore, it is necessary to quickly and efficiently identify increasingly complex and dense communication signals, and it is required to determine the carrier fr...

AI Technical Summary

Problems solved by technology

[0005] But for MAPSK (Multiple Amplitude Phase Shift Keying), its modulation standard constellation diagram is a non-strict phase modulation signal, and the Nth power is performed on the modulated signal and the FFT (FastFourier Transformation) calculation is performed on the signal obtained after the Nth power of the modulated signal , the obtained carrier estimation deviation is large

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