Systems Engineering and Electronics ›› 2023, Vol. 45 ›› Issue (10): 3302-3311.doi: 10.12305/j.issn.1001-506X.2023.10.35
• Communications and Networks • Previous Articles
Single-channel blind source separation algorithm for energy differential mixed signals
Weihong FU, Yufei ZHOU, Wensheng ZHAO
- School of Telecommunications Engineering, Xidian University, Xi'an 710071, China
-
Received:2022-07-07Online:2023-09-25Published:2023-10-11 -
Contact:Weihong FU
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Cite this article
Weihong FU, Yufei ZHOU, Wensheng ZHAO. Single-channel blind source separation algorithm for energy differential mixed signals[J]. Systems Engineering and Electronics, 2023, 45(10): 3302-3311.
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Fig.1
Schematic diagram of mixed signals parameter estimation"
Fig.1
Table 1
Source signal parameters"
| 源信号si(t) | 幅度 | 滚降系数 | 低通采样频率Fs1/MHz | 符号速率Rb/(bit/s) | 载频fi/MHz |
| s1(t) | 1 | 0.5 | 20 | 200×103 | 5 |
| s2(t) | 3 | 0.5 | 20 | 200×103 | 5.2 |
Table 1
Table 2
Mixed signal parameter estimation results"
| 上边频fl/MHz | 下边频fr/MHz | 分界频率fm/MHz | fl到fm之间频谱平均值${\bar F}$1 | fm到fr之间频谱平均值${\bar F}$2 | 能量比 | 能量较大信号频率范围Δfmax/MHz | 能量较小信号频率范围Δfmin/MHz |
| 4.89 | 5.32 | 5.11 | 63.56 | 180.62 | 3 | [5.11, 5.32] | [4.89, 5.11] |
Table 2
Table 3
Spectral correlation coefficient and center frequency obtained by EVMD algorithm"
| 参数 | 1 | 2 | 3 | 4 |
| 谱相关系数ρi | 0.094 0 | 0.363 2 | 0.396 9 | 0.362 2 |
| 中心频率fci′/MHz | 4.99 | 5.14 | 5.20 | 5.26 |
Table 3
Fig.2
Signal spectrum comparison diagram"
Fig.2
Table 4
Correlation coefficient between estimated signals and source signal"
| 信号类型 | 源信号s1(t) | 源信号s2(t) |
| 估计信号y1(t) | 0.838 5 | 0.047 8 |
| 估计信号y2(t) | 0.030 5 | 0.947 1 |
Table 4
Fig.3
Variation curve of correlation coefficient between estimate signals and source signals with signal to noise ratio under different modulation signals"
Fig.3
Fig.4
Variation curve of bit error rate between estimated signals with small energy and source signals with signal to noise ratio under different modulation signals"
Fig.4
Fig.5
Variation curve of correlation coefficient between estimate signals and source signals with signal to noise ratio under different carrier frequency intervals"
Fig.5
Fig.6
Variation curve of bit error rate between estimated signals with small energy and source signals with signal to noise ratio under different carrier frequency intervals"
Fig.6
Fig.7
Variation curve of correlation coefficient between estimate signals and source signals with signal to noise ratio"
Fig.7
Fig.8
Variation curve of bit error rate between estimated signals with small energy and source signals with signal to noise ratio"
Fig.8
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