DocumentCode :
2975953
Title :
Adaptive OFDM radar for detecting a moving target in urban scenarios
Author :
Sen, Satyabrata ; Hurtado, Martin ; Nehorai, Arye
Author_Institution :
Dept. of Electr. & Syst. Eng., Washington Univ. in St. Louis, St. Louis, MO
fYear :
2009
fDate :
8-13 Feb. 2009
Firstpage :
268
Lastpage :
272
Abstract :
We address the problem of detecting a moving target in an urban canyon using an orthogonal frequency division multiplexing (OFDM) radar and exploiting the multipath reflections. The multipath propagation increases the spatial diversity of the radar system and provides different Doppler shifts over different path. In addition, the use of broadband OFDM signal provides frequency diversity to the system. We develop a parametric measurement model that accounts for the multipath components at multiple frequencies as well as Doppler shifts. Then, we develop a statistical detection test and evaluate its performance characteristics. Based on this, we propose an algorithm to optimally design the spectral weights for the next transmitting waveform. We present a few numerical examples to illustrate our analytical results. We demonstrate the achieved performance improvement due to the exploitation of multipath propagation, OFDM signalling, and adaptive waveform design.
Keywords :
Doppler radar; OFDM modulation; diversity reception; electromagnetic wave reflection; radar detection; radiowave propagation; statistical testing; Doppler shift; adaptive OFDM radar; broadband OFDM signal; frequency diversity; moving target detection; multipath propagation; multipath reflection; orthogonal frequency division multiplexing radar; parametric measurement model; statistical detection test; urban canyon; Algorithm design and analysis; Doppler radar; Doppler shift; Frequency diversity; Frequency measurement; OFDM; Radar detection; Reflection; Signal design; Testing;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Waveform Diversity and Design Conference, 2009 International
Conference_Location :
Kissimmee, FL
Print_ISBN :
978-1-4244-2970-7
Electronic_ISBN :
978-1-4244-2971-4
Type :
conf
DOI :
10.1109/WDDC.2009.4800358
Filename :
4800358
Link To Document :
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