In the study of passive localization problem

localization estimation can be seriously influenced by sensors-emitter space. Angle-of-arrival（ AOA） measurements are used to locate emitter by configuration with passive receivers. The Cramer-Rao bound（ CRB） is calculated and the optimal space configuration is analyzed via changing distance and angular distribution

theoretic analysis of optimal geometry of receiver-target is given without considering receiver constraints. Analytic solutions to the optimal space configuration of receiver are achieved in static cases. Simulation verification is carried out by using self-adaptive genetic algorithm（ GA）.