Estimation of distance and its derivatives in the bistatic passive radar location system

Passive radar systems make it possible to detect and track sources of radio emission at a longer range than active systems, while increasing the stealth and survivability of its carriers. However, in order to carry out effective guidance on the emission source, it is necessary to have, on top of the estimates of the angular coordinates, estimates of range and velocity. In the case of single-passive systems, such estimates can be obtained by flying on a special trajectory, but accuracy even when tracking stationary objects is low. The most rational solution to this problem is to use multi-position passive systems.
The problem of estimating the coordinates in multi-position passive radar systems is considered in the article. Based on the apparatus of linear analog-discrete filtering, an algorithm is obtained for estimating the range and speed in a bistatic passive radar system. Results of simulation of the algorithms confirm its effectiveness and lesser computational cost when compared with non-linear algorithms.