Efficient Methods of Doppler Processing for Coexisting Land and Weather Clutter

Download
2008-05-30
The joint suppression of returns from land and weather clutter is required in many radar applications. Although the optimal method of land-weather clutter suppression is known, the solution is usually not practical to implement. In this paper, we propose a method that employs rank-1 and rank-2 approximations on the weather clutter correlation matrix to obtain suboptimal but simpler detectors which are easier to implement. The performance of the proposed detectors is compared with the optimal detector and some other detectors commonly used for clutter suppression.

Suggestions

Efficient Methods of Clutter Suppression for Coexisting Land and Weather Clutter Systems
Candan, Çağatay; Yılmaz, Ali Özgür (Institute of Electrical and Electronics Engineers (IEEE), 2009-10-01)
The removal of coexisting land and weather clutter signals is a common problem in many radar applications. Although the optimal method for land-weather clutter suppression is known, it is usually not amenable to implementation due to computation and storage limitations of the processor. We propose an alternative method that employs low rank approximations on weather clutter correlation matrix to obtain detectors which are feasible to implement. The performance of the proposed method is compared with the opt...
IMPLEMENTATION OF MATCH FILTERS AS IP CORE FOR SONAR APPLICATIONS
Karabalkan, Melike Atay; Oner, Mehmet (2015-05-19)
Matched Filtering is an important part of the radar and sonar systems. Implementation of match filtering in time or frequency domain can be more advantageous due to bandwidth constraints. Another important part in match filtering is unwanted sidelobes. These sidelobes can be detected as a main part of another signal and it can be misleading. In literature, lots of methods have been proposed to reduce sidelobes. Each method has advantages and disadvantages regarding resource usage and speed. In this work, ma...
Design of an experimental FMCW weather radar
Coşkun, Salih; Yılmaz, Ali Özgür; Koç, Seyit Sencer; Department of Electrical and Electronics Engineering (2015)
FMCW Radars are used in many applications including weather surveillance. Transmitting during the entire observation interval makes them efficient in terms of required power. They are also cheap and easy to implement. This study which was conducted as a master's thesis, is a radar system working at X band. In this system, 0.8 Watts continuous electromagnetic wave which is modulated with a frequency ramp of 30 MHz bandwidth is generated and radiated through the transmit antenna. The scattered signal from the...
Dynamic sea clutter simulation at low grazing angles
Erdoğan, Muhammed Z; Koç, Seyit Sencer; Department of Electrical and Electronics Engineering (2018)
High-amplitude clutter signals may be observed during radar operation due to environmental objects having large surface areas. By Doppler processing, modern radars can discriminate between echoes from mobile targets and echoes from stationary objects like mountains, buildings and so on. However, there is no simple way to do this discrimination for sea clutter since sea is always on the move. Therefore, statistical and empirical models are frequently used to characterize sea clutter. Yet, such models are unl...
A Low Complexity Two-Stage Target Detection Scheme for Resource Limited Radar Systems
Candan, Çağatay (2013-01-01)
A two-stage detector is proposed to accommodate high computational load requirements of modern radar systems. The first stage of the proposed system is a low-complexity detector that operates at an unusually high false alarm probability value around 1/10. This stage is to prescreen and eliminate some of the test cells with relatively few operations. The second stage operates only on the cells passing the prescreening stage and implements a high-complexity detector at a desired system false alarm rate. Due t...
Citation Formats
Ç. Candan and A. Ö. Yılmaz, “Efficient Methods of Doppler Processing for Coexisting Land and Weather Clutter,” 2008, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/42352.