Weighted target detector via estimated SNR in a multipath environment

Autor: Guo-ping Hu, Hao Zhou, Jun-peng Shi, Yu Xiao
Jazyk: angličtina
Rok vydání: 2019
Předmět:
mimo systems
multipath environment
Computer science
probability
MIMO
Energy Engineering and Power Technology
low-altitude environment
02 engineering and technology
Signal
law.invention
0203 mechanical engineering
law
detection performance
0202 electrical engineering
electronic engineering
information engineering
radar detection
estimated snr
low-altitude target detection
low snr channels
Radar
Computer Science::Information Theory
020301 aerospace & aeronautics
traditional equal weight detector
Detector
General Engineering
estimated signal-to-noise ratio
multipath channels
020206 networking & telecommunications
object detection
low-snr region
Eigenfunction
weighted target detector
high snr channels
novel weighted detector
multipath intensity factor
lcsh:TA1-2040
negative multipath effect
filtering theory
Detection performance
esnr
eigenvalues and eigenfunctions
mimo communication
serious performance degradation
lcsh:Engineering (General). Civil engineering (General)
Algorithm
Software
Multipath propagation
Degradation (telecommunications)
Zdroj: The Journal of Engineering (2019)
DOI: 10.1049/joe.2019.0416
Popis: Multipath effect cause serious performance degradation in low-altitude target detection. To overcome the negative multipath effect in a low-altitude environment, a novel weighted detector based on the estimated signal-to-noise ratio (ESNR) is proposed. By introducing the multipath intensity factor, the signal models for different radar systems in the low-altitude environment are established. Then, inspired by the recent development of cognitive theory, the weighted detector based on ESNR is proposed to strengthen the high SNR channels and suppress the low SNR channels. The eigenfunction method is adopted to derive the theoretical detection probability of the proposed detector. Simulation results suggest that, compared with the traditional equal weight detector, the proposed detector can effectively overcome the negative influence of multipath and improve the detection performance in the low-altitude environment. It is also proved that in most cases, with the proposed method, multi-input multi-output (MIMO) radar has better detection performance than that of other radars in the low-SNR region.
Databáze: OpenAIRE
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