Within the next decade intelligent millimeterwave radar systems for vehicular sensor applications in the frequency band from 77 GHz to 81 GHz will be developed in Germany. State of the art in passive and active components of monolithic integrated silicon millimeterwave systems is discussed and the data of already realized components are presented.

Before radar systems gained widespread use, passive sound-detection based systems were employed in Great Britain to detect incoming aircraft. This paper examines a proposed system that utilizes two microphone systems, with the goal of measuring the angle of arrival of an aircraft. Noise from nearby automobile traffic will be modeled, and the effects on system performance will be estimated and s...

Active and passive microwave remote sensing data offer complementary information on the properties of the observed scene. This study investigates the relationship of L-band radiometer and radar signals to vegetation and soil during four field campaigns conducted in United States between 1999 and 2008. The study shows complex relationship between radiometer observed reflectivity and radar observ...

The central purpose of passive signal intercept receivers is to perform automatic categorization of unknown radar signals. Currently, there is an urgent need to develop intelligent classification algorithms for these devices due to emerging complexity of radar waveforms. Especially multifunction radars (MFRs) capable of performing several simultaneous tasks by utilizing complex, dynamically var...

This paper describes a computationally e cient nearly-optimal Bayesian algorithm to estimate rain (and drop-size-distribution) pro les, given a radar re ectivity pro le at a single attenuating wavelength. In addition to estimating the averages of all the mutually ambiguous combinations of rain parameters that can produce the data observed, the approach also calculates the r.m.s. uncertainty in ...

This paper concerns the detection, parameter and height estimation of PN signals, with a passive radar receiver network applied in wireless communication systems, in multipath interference. The investigation is obtained by Monte Carlo simulation. The achieved results can be applied for target detection in multistatic radars using existing communication networks.

Mapping of natural and man-made water bodies is a critical component of environmental studies, including climate change, agriculture, flood forecasting and groundwater recharge estimation. Moreover, standing water heavily impacts the ability to accurately estimate soil moisture from satellite, particularly from low resolution passive microwave data using a radiometer. NASA’s soil moisture dedic...

The connections between laboratory measurements and remote-sensing observations of sea ice are explored. The focus of this paper is on thin ice, which is more easily simulated in a laboratory environment. We summarize results of C-band scatterometer measurements and discuss how they may help in the interpretation of remote-sensing data. We compare the measurements with observations of thin ice ...