Results 1 to 10 of about 412 (70)
An Efficient Digital Channelized Receiver for Low SNR and Wideband Chirp Signals Detection
Applied Sciences, 2023 Synthetic aperture radar (SAR) is essential for obtaining intelligence in modern information warfare. Wideband chirp signals with a low signal-to-noise ratio (SNR) are widely used in SAR.
Wenhai Cheng +4 more
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IEEE Access, 2021 A novel photonic scheme for generating multi-band dual-chirp waveforms with linear or nonlinear chirp rates is proposed via two cascaded polarization modulators (PolMs) paralleled with a phase modulator (PM).
Hongshi Zhao, Jianxin Ma
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Photonics‐based de‐chirp processor with the capability of processing dual‐band signals
Electronics Letters, 2021 A photonics‐based de‐chirp processor with the capability of processing dual‐band linearly frequency‐modulated (LFM) waveforms is proposed and demonstrated.
Jiang Liu +3 more
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Photonic Generation of Switchable Dual-Band Dual-Chirp Microwave Waveforms
IEEE Photonics Journal, 2022 In this article, a photonic scheme based on dual-drive dual-parallel Mach-Zehnder modulator (DD-DPMZM) to generate switchable dual-band dual-chirp microwave waveforms is proposed and experimentally demonstrated.
Shuaiquan Yu +3 more
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IET Radar, Sonar & Navigation, 2021 Direction of arrival (DOA) estimation for signals with large time‐bandwidth products is very important in modern communication and radar systems. Traditional narrowband DOA estimation algorithms are not accurate for such wideband signals.
Ronald Mulinde +2 more
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Interspecific differences of stridulatory signals in three species of bark beetles from the genus Polygraphus Er. (Coleoptera: Curculionidae, Scolytinae) inhabiting the island of Sakhalin [PDF]
PeerJ, 2020 Stridulatory signals are involved in conspecific interactions between bark beetles (Coleoptera: Curculionidae, Scolytinae). In this study, we compared the qualitative profiles of acoustic signals in three species from the genus Polygraphus Er.
Ivan Andreevich Kerchev
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IEEE Access, 2020 Parameter estimation of chirp signals plays an important role in the field of radar countermeasures. Compressed sensing (CS) based sub-Nyquist sampling and parameter estimation methods alleviates the pressure on hardware systems to acquire and process ...
Hanning Su, Qinglong Bao, Zengping Chen
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IET Radar, Sonar & Navigation, 2021 In ISAR imaging, echo signals of complex manoeuvring targets have to be modelled as multi‐component cubic phase signals (m‐CPS). In this condition, the Doppler diffusion will seriously affect the quality of ISAR imaging.
Fengkai Liu +3 more
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IEEE Photonics Journal, 2021 We propose a photonic scheme to generate binary phase-coded microwave pulses and dual-chirp microwave waveforms without baseband-modulated signals (background noise) based on a dual-polarization dual-drive Mach-Zehnder modulator (DP-DDMZM) which contains
Guangyi Li +6 more
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Sensors, 2019 There are some special merits for the orthogonal frequency division multiplexing (OFDM) chirp waveform as multiple input multiple output (MIMO) signals. This signal has high range resolution, good Doppler tolerance, and constant modulus superiority since
Xiang Lan, Min Zhang, Jin-Xing Li
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