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31 October 2014Digital orthogonal receiver for wideband radar based on compressed sensing
Digital orthogonal receiver is one of the key techniques in digital receiver of soft radar, and compressed sensing is
attracting more and more attention in radar signal processing. In this paper, we propose a CS digital orthogonal
receiver for wideband radar which utilizes compressed sampling in the acquisition of radar raw data. In order
to reconstruct complex signal from sub-sampled raw data, a novel sparse dictionary is proposed to represent the
real-valued radar raw signal sparsely. Using our dictionary and CS algorithm, we can reconstruct the complex-valued
radar signal from sub-sampled echoes. Compared with conventional digital orthogonal radar receiver, the
architecture of receiver in this paper is more simplified and the sampling frequency of ADC is reduced sharply.
At the same time, the range profile can be obtained during the reconstruction, so the matched filtering can
be eliminated in the receiver. Some experiments on ISAR imaging based on simulated data prove that the
phase information of radar echoes is well reserved in our orthogonal receiver and the whole design is effective for
wideband radar.
Qingkai Hou,Yang Liu,Zengping Chen, andShaoying Su
"Digital orthogonal receiver for wideband radar based on compressed sensing", Proc. SPIE 9254, Emerging Technologies in Security and Defence II; and Quantum-Physics-based Information Security III, 925411 (31 October 2014); https://doi.org/10.1117/12.2067016
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Qingkai Hou, Yang Liu, Zengping Chen, Shaoying Su, "Digital orthogonal receiver for wideband radar based on compressed sensing," Proc. SPIE 9254, Emerging Technologies in Security and Defence II; and Quantum-Physics-based Information Security III, 925411 (31 October 2014); https://doi.org/10.1117/12.2067016