Precise Positioning Methods Of Netted UWB Battlefield Surveillance Radars

There are tremendous application requirements about radar in modern war, preparation of the battlefield, strategic point protection and fighting against terrorism. UWB (Ultra-Wide Band) Battlefield surveillance radar has excellent performances in foliage penetration and precise ranging, thereby there are much greater values in military and civil fairs with research it. Unfortunately, the domestic research in this area is still blank. This paper should solve the inherent problem of the low azimuth resolution of P-band UWB radar.In this paper, firstly, the foundation theories on (T/R)~n bistatic(multistatic) radar positioning based on range observations are analyzed. Secondly, two new methods implemented easily about improvement with velocity compensation on the average time method are brought out, one is using Doppler velocity to compensate relative velocity, the other is using the estimated target speed in approximate congruent triangles. Thirdly, one method is proposed to use 2-D positioned results as the initial value of the 3-D iterative algorithm with three radars. Fourthly, tradeoff between positioning accuracy and region is studied in 2-D positioning by two radars, and the critical values of the baseline length is found, that corresponding to the largest area in which targets can be positioned precisely enough. Fifthly, UWB communication channel model and improving ranging accuracy ways depended on the model parameters are studied, furthermore, establishing channel model on UWB radar wave propagation through foliage is described. Sixthly, APC (Adaptive Pulse Compression) just proposed in recent years, which can be use for super-accuracy positioning, is investigated. All of the methods mentioned above have been systematically integrated, and the implementation process is brought forward.Finally, results of the above ideas and algorithms are showed by MATLAB simulations, and the parameters are selected according with the practical application. Further verifiers will be done in field experiments in the near future.