利用联合特征参数的卫星单-混信号调制识别

doi:10.12305/j.issn.1001-506X.2023.02.32

Abstract

Abstract:

In view of the common single-mix binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), 8 phase shift keying (8PSK) and 16 quadrature amplitude modulation (16QAM) signal modulation recognition problems in satellite communications, based on the cumulative differencesand spectrum characteristics of different modulating signal, we make full use of the cumulants and spectral characteristics and construct reasonable characteristic parameters, and finally build a decision tree classifier. It achieves the modulation recognition of these signal, and effectively realizes the recognition of mixed QPSK and mixed 8PSK signals. Test shows that the algorithm can achieve the classification of single-mix BPSK, QPSK, 8PSK and 16QAM signals affected by Gaussian white noise. When the signal-to-noise ratio is greater than 6 dB, except mixed QPSK and mixed 8PSK signals, the modulation recognition rate of other signals can reach 98%. When the signal-to-noise ratio is greater than 10 dB, the modulation recognition rate of mixed QPSK and mixed 8PSK signals can reach 92%. Compared with the existing algorithms, the recognition rate is higher, which proves the effectiveness of the proposed algorithm.

Key words: modulation recognition, cumulant, spectrum characteristics, characteristic parameters, decision tree classifier

CLC Number:

TN911

Pei GONG, Tianyun LI, Xinliang ZHANG, Chentao CUN. Modulation recognition for satellite single-mixed signals using joint characteristic parameters[J]. Systems Engineering and Electronics, 2023, 45(2): 589-596.

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调制方式	$\widetilde{C} $₂₀	$\widetilde{C} $₂₁	$\widetilde{C} $₄₀	$\widetilde{C} $₄₂	$\widetilde{C} $₆₃
BPSK	1	1	-2	-2	16
QPSK	0	1	1	-1	4
8PSK	0	1	0	-1	4
16QAM	0	0	0.4	-0.27	0
BPSK混	0.24	0.24	0.87	0.87	-3.16
QPSK混	0	0.25	0.23	0.26	-0.5
8PSK混	0	0.25	0	0.3	-0.5
16QAM混	0	0	0.12	0.75	0

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Modulation recognition for satellite single-mixed signals using joint characteristic parameters

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特征参数	QPSK	8PSK	16QAM
F₁	16	16	0

特征参数	QPSK混	8PSK混	16QAM混
F₁	2	2	0