时宽-波形基联合捷变的LPD通信波形

doi:10.3969/j.issn.1001-506X.2020.12.26

Abstract

Abstract:

In order to improve the performance of the low probability of detection (LPD) for the communication signal, the waveform framework based on joint agility of time width and waveform bases (JATW) is proposed from the perspective of reducing energy convergent characteristic (ECC) in various transform domains. Based on this framework, the chirp spread spectrum (CSS) and sinusoidal frequency spread spectrum (SFSS) are adopted as waveform bases, and a mixed LPD waveform based on VTW-CSS/SFSS is proposed using the parameter configuration method with the varied time width (VTM). Mathematical deduction and numerical simulation demonstrate the ECC of the proposed waveform over various transform domains. Theoretical analysis and numerical simulation results show that the proposed waveform reduces the ECC over various transform domains, compared with the CSS and the SFSS, the wareform framework based on JATW benefits the improvement of LPD feature for the communication waveform.

Key words: low probability of detection (LPD), joint agility of time width and waveform base (JATW), varied of time width (VTW), chirp spread spectrum (CSS), sinusoidal frequency spread spectrum (SFSS), energy convergence characteristic (ECC)

CLC Number:

TN911.6

Xiaotong ZHANG, Shukai LI, Zhiguo SUN, Hong XIE. LPD communication waveform of joint time width waveform agility[J]. Systems Engineering and Electronics, 2020, 42(12): 2884-2891.

Figures/Tables 10

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References 31

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波形子集	m^VTW-CSS(t)	m^VTW-SFSS(t)
时宽序号i	m_{i, b}^VTW-CSS(t)	m_{i, b}^VTW-SFSS(t)
波形时宽控制字C_j^T	C_j^T=i－1	C_j^Wj=1
波形基控制字C_j^W	C_j^W=1	$\overline {C_j^W} =1$
波形时宽	T_i	T_i
扫频带宽	B	B
时宽带宽积	D_i=BT_i	D_i=BT_i

D_i取值	波形
D_i取值	CSS	SFSS	CSS/SFSS	DSSS/BPSK
50	0.197 3	0.193 7	0.174 1	0.363 4
100	0.163 5	0.162 0	0.144 8	0.361 2
150	0.146 7	0.149 6	0.132 7	0.360 1
200	0.134 6	0.138 0	0.122 2	0.359 9

波形参数	波形
波形参数	CSS	VTW-CSS	VTW-CSS/SFSS
波形时宽/s	1.00	0.90、1.10	0.9、1.10
曲线标准方差(精度为10^-4)	0.864 1	0.073 4	0.037 7

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LPD communication waveform of joint time width waveform agility

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参数	波形
参数	CSS	VTW-CSS	VTW-CSS/SFSS
SNR限/dB	-14.2	-12.6	-10.5