In this paper we introduce and analyze a passive synthetic aperture radar system motivated by space surveillance radar networks for detecting, tracking, imaging, and identifying small debris (aka target) in low-earth orbit. We propose a system with a powerful transmitter on the ground and one or several flying receiver platforms. Each platform can separate the direct signals from the source, co...

Synthetic aperture radar (SAR) allows all-weather, day-and-night surface surveillance and has the ability to detect, classify and geolocate objects at long stand-off ranges. Bistatic SAR, in which the transmitter and the receiver are on separate platforms, is seen as a potential means of countering the vulnerability of conventional monostatic SAR to electronic countermeasures, particularly dire...

Recently many studies have been done on different issues of using multiple antennas at transmit and receive sides of a radar system in a MIMO (Multiple Input Multiple Output) configuration. In addition, for the purpose of electronic warfare, the utilization of available signals of the environment to detect the targets has gained considerable attention in recent years. Such passive radars use th...

Cyclic prefix (CP) based MIMO-OFDM radar has been recently proposed for distributed transmit antennas, where there is no inter-range-cell interference (IRCI). It can collect full spatial diversity and each transmitter transmits signals with the same frequency band, i.e., the range resolution is not reduced. However, it needs to transmit multiple OFDM pulses consecutively to obtain range profile...

This work addresses the problem of target detection for multistatic radars. We propose an algorithm that is able to keep constant the false alarm rate, when the disturbance samples associated with each receiver-transmitter pair are distributed according to a compound Gaussian model. The performance of the proposed detection algorithm are analysed to assess the impact of clutter diversity on det...

The Tasman International Geospace Environment Radar (TIGER), which is part of the global SuperDARN network, is a dual HF radar system with overlapping footprints designed to map ionospheric motions by detecting ionospheric scatter. The stereo SuperDARN radar concept is an interesting new innovation that effectively enables two radars to operate from the one site, sharing expensive infrastructur...

For the best surveillance picture, surveillance data from sources on different platforms should be combined. This requires a robust communication capability for transferring both raw sensor data and processed track data between platforms. A communication system can be built using existing radar transmitters and antennas. This report describes a communications architecture and associated protoco...

The superiority of multiple-input multiple-output (MIMO) radars over conventional radars has been recently shown in many aspects. These radars consist of many transmitters and receivers located far from each other. In this scenario, the MIMO radar is able to observe the targets from different directions. One of the advantages of these radars is exploitation of Doppler frequencies from different...

Recently, advanced driver assistance systems (ADAS) with the keyword of “safety” have attracted attention in the world. Many mega-suppliers (Tier 1) and the others have been carrying out development for safe systems using cameras, lasers, and millimeter-wave radar to realize a self-driving system in the near future. Fujitsu Laboratories has been developing millimeter-wave monolithic microwave i...

A fundamental task in wireless communication is channel estimation: Compute the channel parameters a signal undergoes while traveling from a transmitter to a receiver. In the case of delay-Doppler channel, a widely used method is the matched filter algorithm. It uses a pseudo-random waveform of length N, and, in case of non-trivial relative velocity between transmitter and receiver, its computa...