Receiver antenna scan rate requirements needed to implement pulse chasing in a bistatic radar receiver

Abstract

Pulse chasing is a technique implemented by a bistatic or multistatic radar system that allows rapid and efficient search of a desired volume of space whereby the receiving antenna is made to follow or "chase" the transmitted pulse as it travels radially outward from the transmitter antenna. An expression for receiver antenna scan rate requirements is derived that corrects an error in the prior literature. The results give significantly reduced scan rates in the forward scatter region near the baseline showing that pulse chasing is more easily implemented using conventional analog beamformer phased array technology than was suggested by prior work.

Bistatic and Stereoscopic Configurations for HF Radar

“…Of course, for low-power radars, background noise will almost invariably swamp RTW returns. Fourth, when pulsed waveforms are used, the fact that bistatic geometry couples time delay to angle-of-arrival may require that one implements a pulse-chasing capability [19], with its attendant penalties. Fifth, the spatial properties of bistatic resolution cells are well-known [20], but less attention has been paid to what we might call the Doppler sensitivity, ∂ω ∂v , where ω is the Doppler shift and v is the target speed.…”

“…It is instructive to see the form of the Doppler spectrum as a function of the bistatic geometry for particular situations and as a function of various parameters. First, we present Figure 8, taken from [19], which shows, at a most basic level, how a particular seastate modulates the frequency of the scattered signal depending on the scattering geometry: Back scatter, forward scatter, side scatter, or up scatter. In this example, only the VV (vertical in, vertical out) element of the polarization power scattering matrix is presented.…”

Multistatic adaptive pulse compression

“…This paper introduces a multistatic method for adaptive pulse compression as a possible mechanism to enable shared-spectrum multistatic radar. Multistatic system-level topics such as pulse-chasing [3] are not addressed here. The focus of this work is upon the signal processing involved in the separation and subsequent pulse compression of multiple concurrently-received shared-spectrum radar return signals originating from multiple transmitters.…”

Azimuth-Variant Signal Processing in High-Altitude Platform Passive SAR with Spaceborne/Airborne Transmitter

“…Moreover, the satellite antenna direction is often uncontrollable for us. The pulse chasing technique proposed in [30] cannot be easily implemented for noncooperative passive BiSAR configurations, particularly when spaceborne transmitter is employed. For these reasons, we use a wide antenna beamwidth on receiver due to its advantage of high signal-to-noise ratio (SNR) in this system.…”