Emitter identification of electronic intelligence system using type-2 fuzzy classifier

Figures & data

Figure 1. The clock uncertainty interval-valued clock cycles in ELINT modulation.

Figure 2. ELINT System for intercepting pulses used in this paper.

Table 1.  A sample radar pulse data-set for experiments.

	RF (GHz)		PRI (μs)		PW (μs)
Emitter sample	Lower limit	Upper limit	Lower limit	Upper limit	Lower limit	Upper limit	Emitter type
1	15.77	16.57	8.21	9.33	2.52	3.39	1
2	15.60	16.13	8.16	8.92	2.33	3.13	1
3	15.85	16.54	8.62	9.46	2.25	3.58	1
4	15.69	16.45	8.35	9.52	2.37	2.76	1
5	4.42	4.81	2.93	3.49	2.65	4.67	2
6	4.50	4.83	2.84	3.96	3.02	4.67	2
7	4.59	4.99	3.14	4.06	2.86	4.00	2
8	4.45	4.71	3.14	3.55	3.40	4.18	2
9	16.37	17.37	5.88	6.80	5.49	7.22	3
10	16.54	17.40	5.78	6.14	6.19	7.22	3
11	16.85	16.93	5.47	6.42	5.95	7.81	3
12	16.72	17.40	5.16	6.03	6.20	7.25	3
13	3.84	4.26	8.55	9.04	4.18	4.47	4
14	6.07	6.16	8.42	9.42	3.99	4.30	4
15	5.76	6.34	8.49	8.88	4.16	4.55	4
16	6.03	6.54	8.84	9.24	3.80	4.27	4
17	8.75	9.10	6.58	7.04	2.89	3.36	5
18	9.04	9.21	6.33	7.40	3.14	3.35	5
19	8.61	9.38	6.81	7.27	3.05	3.45	5
20	8.98	9.35	6.64	6.90	2.85	3.37	5
131	10.01	10.01	8.16	8.16	2.08	2.08	1
132	4.32	4.32	3.13	3.13	3.42	3.42	2
133	16.61	16.61	5.53	5.53	5.89	5.89	3
134	16.89	16.89	5.51	5.51	5.91	5.91	3
135	8.82	8.82	6.30	6.30	2.94	2.94	5
136	15.83	15.83	8.42	8.42	2.38	2.38	1
137	15.80	15.80	8.48	8.48	2.41	2.41	1
138	5.82	5.82	8.66	8.66	3.90	3.90	4
139	6.02	6.02	8.79	8.79	4.10	4.10	4
140	8.68	8.68	6.68	6.68	2.90	2.90	5
141	16.61	16.61	5.53	5.53	5.89	5.89	3
142	4.20	4.20	3.21	3.21	2.62	2.62	2
143	5.97	5.97	8.36	8.36	4.12	4.12	4
144	5.62	5.62	8.27	8.27	4.10	4.10	4
145	4.49	4.49	2.60	2.60	3.57	3.57	2
146	9.05	9.05	6.78	6.78	3.20	3.20	5
147	16.04	16.04	8.45	8.45	1.97	1.97	1
148	4.38	4.38	3.27	3.27	3.50	3.50	2
149	16.89	16.89	5.94	5.94	5.60	5.60	3
150	8.97	8.97	6.46	6.46	3.02	3.02	5

Figure 3. Triangular T2 MF (base left/right endpoints) with uncertain interval-value. (a) Example of type-1 and type-2 MF. (b) T2 MF endpoints with uncertain interval-value.

Figure 4. The operation scheme of design of type-2 fuzzy classifier using uncertainty UMF and LMF bounds technique.

Figure 5. RF (lower limit) for the MFs.

Figure 6. T2 fuzzy flassifier for antecedent MFs’ UMF/LMF.

Table 2.  Average EDL performance of type-2 and type-1 fuzzy classifiers testing samples with jitter variation.

	Interval-value data
EDL (%)	Type-1 fuzzy classifier	Type-2 fuzzy classifier
20	43.2	70.5
18	49.3	75.7
16	52.7	79.2
14	58.6	83.7
12	64.1	87.5
10	69.6	89.6
8	73.8	90.9
6	78.6	92.2
4	80.7	94.5
2	83.5	98.7
0	87.7	100