Passive Location And Positioning Performance Analysis

With the development of science and tecbnology,the electronic warfare has gotten to a new stage,electronic jammers,anti-radialized missiles,superlow altitude attacks have turned into great threats confronted with radar nowadays.Former single-based radar not only had difficulty in finishing expected tasks,but also the survival of itself had been a pressing problem,people have to probe into multifarious countermeasures in order to improve the viability and effective work-capacity.Passive detection system have high concealing and survival ability, due to not emitting electromagnetic wave.Ln recent years,many new techniques have been developed,among which multi-based passive detection has gotten great attentions coming from all over the world.The emitter location methods commonly include: Angle of Arrival (AOA) measurement,time-difference-of-arrival(TDOA)measurement and AOA together with TDOA measurement.This paper derive some important techniques and theories bearing upon passive location in this field.Three kinds of passive location algorithm in three-dimensional(3-D) space are deduced based on that of 2-D space.At the same time each performance is analyzed,each graph of geometric dilution of precession(GDOP) is emulated for different station position,different measurement error,and different target height.Accordingly some valuable academic and emulational results are obtained by myself,which will provide researches in this field with definite technical refrence.At the end of this paper,the passive location method of JTIDS(joint tactical distribution systems) is discussed,which is expected to enforce the tactical performance of JTIDS in the intending development.