Accession Number : ADP006374

Title :   Radar Ground Clutter Measurement and Models. Part 2. Spectral Characteristics and Temporal Statistics,

Corporate Author : DEFENCE RESEARCH ESTABLISHMENT OTTAWA (ONTARIO)

Personal Author(s) : Chan, Hing C.

Report Date : SEP 1991

Pagination or Media Count : 14

Abstract : The performance of ground-based surveillance radars is affected by the spectral characteristics and the temporal statistics of ground clutter. Traditionally, ground clutter problems are treated by employing filtering techniques such as delay-line cancellers. These techniques result in a degraded detection performance of low-velocity targets. With the worsening congestion in air traffic, there is an increased demand for improved performance of low-velocity target detection. To improve the detection performance of ground-based surveillance radars for low-velocity targets, signal processing algorithms which exploit ground-clutter characteristics must be developed. This requires a thorough understanding of ground-clutter behaviour. In this paper, we report the results of the spectral and statistical analyses of low-angle ground clutter, using data of the MIT Lincoln Laboratory Phase I program and S-band coherent ground-clutter data collected by the Radar Division of the Defence research Establishment Ottawa. The results of the spectral analysis show that ground clutter, as observed by a coherent radar with a stationary antenna, comprises three components: (a) a coherent component, (b) a slow-diffuse component and (c) a fast-diffuse component. These components can be described by relatively simple models. The model parameters are functions of radar frequency, waveform resolution, land cover and wind speed.

Descriptors :   *COHERENT RADAR, *GROUND CLUTTER, *RADAR, *TARGET DETECTION, AIR, AIR TRAFFIC, ALGORITHMS, ANGLES, ANTENNAS, CLUTTER, CONGESTION, DELAY, DELAY LINES, DETECTION, DIVISION, FILTRATION, FREQUENCY, FUNCTIONS, GROUND BASED, LABORATORIES, LOW ANGLES, LOW VELOCITY, MODELS, PAPER, PARAMETERS, PHASE, PROCESSING, RESOLUTION, S BAND, SIGNAL PROCESSING, SIGNALS, STATIONARY, STATISTICS, SURVEILLANCE, TARGETS, TRAFFIC, VELOCITY, WAVEFORMS, WIND VELOCITY, MILITARY EQUIPMENT.

Subject Categories : Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE