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v2009.01.01 - Convex Optimization

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4.4. RANK-CONSTRAINED SEMIDEFINITE PROGRAM 293<br />

1.2<br />

1<br />

0.8<br />

0.6<br />

0.4<br />

0.2<br />

0<br />

−0.2<br />

−0.2 0 0.2 0.4 0.6 0.8 1 1.2 1.4<br />

Figure 78: Typical solution for 4-lattice in Figure 73 with noise factor<br />

η = 0.1 . Four red vertical middle-left nodes are anchors; remaining nodes<br />

are sensors. Radio range of sensor 1 indicated by arc; radius = 0.75 . Actual<br />

sensor indicated by target while its localization is indicated by bullet • .<br />

Rank-2 solution found in 7 iterations (678) (1581a).<br />

1.2<br />

1<br />

0.8<br />

0.6<br />

0.4<br />

0.2<br />

0<br />

−0.2<br />

−0.2 0 0.2 0.4 0.6 0.8 1 1.2 1.4<br />

Figure 79: Typical solution for 5-lattice in Figure 74 with noise factor<br />

η = 0.1 . Five red vertical middle nodes are anchors; remaining nodes are<br />

sensors. Radio range of sensor 1 indicated by arc; radius = 0.56 . Actual<br />

sensor indicated by target while its localization is indicated by bullet • .<br />

Rank-2 solution found in 3 iterations (678) (1581a).

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