The Experts below are selected from a list of 327 Experts worldwide ranked by ideXlab platform
Guoyu Wang - One of the best experts on this subject based on the ideXlab platform.
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Experimental study on Pulse Radar target probing in RFS based on interrupted transmitting and receiving
Chinese Journal of Aeronautics, 2018Co-Authors: Qihua Wu, Feng Zhao, Guoyu WangAbstract:Abstract Radar target probing and measurement are challenging tasks for Radio Frequency Simulation (RFS) with Pulse Radar signal. Due to the long-time duration of Pulse Radar signal and the limited space of anechoic chamber, the reflected signal returns before Pulse Radar signal is fully transmitted in RFS. As a consequence, the transmitted and reflected signals are coupled at the receiver. To handle this problem, the Interrupted Transmitting and Receiving (ITR) experiment system is constructed in this paper by dividing the Pulse Radar signal into sub-Pulses. The target echo can be obtained by transmitting and receiving the sub-Pulses intermittently. Furthermore, the principles of ITR are discussed and the target probing experiments are performed with the ITR system. It is demonstrated that the ITR system can overcome the coupling between the reflected and transmitted signals. Based on the target probing results, the performance of Pulse Radar target probing and measurement can be verified in RFS with the ITR system.
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A Novel Strategy for Pulse Radar HRRP Reconstruction Based on Randomly Interrupted Transmitting and Receiving in Radio Frequency Simulation
IEEE Transactions on Antennas and Propagation, 2018Co-Authors: Feng Zhao, Xiaofeng Ai, Guoyu WangAbstract:Target probing based on wideband Pulse Radar is a challenging task for radio frequency simulation (RFS) in anechoic chamber. Due to the long time duration of Pulse Radar signal and the limited space of anechoic chamber, the reflected signal returns before the Pulse Radar signal is fully transmitted, which makes it difficult for the signal reception. As a consequence, the target high-resolution range profile (HRRP) cannot be obtained for target imaging and recognition. In this paper, we propose a novel strategy that contains two steps to solve this problem and obtain the target HRRP. First, the randomly interrupted transmitting and receiving (R-ITR) method is proposed to receive the Pulse Radar signal in RFS. Second, the target HRRP is reconstructed by compressive sensing (CS) since the R-ITR echo is piecewise sparse. The protocol to choose R-ITR parameters and performance of HRRP reconstruction are provided. Simulations and experiments with different R-ITR parameters are also conducted to verify the effectiveness of the proposed method.
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An Equivalent Simulation Method for Pulse Radar Measurement in Anechoic Chamber
IEEE Geoscience and Remote Sensing Letters, 2017Co-Authors: Feng Zhao, Xiaofeng Ai, Guoyu WangAbstract:When a Pulse Radar signal is implemented in a range-limited anechoic chamber for Radar measurement, the transmitted and reflected signal will be coupled at the receiver. To solve this problem and equivalently simulate the whole process of Pulse Radar measurement in an anechoic chamber, the interrupted transmitting and receiving method is proposed in this letter based on interrupted sampling. The constraints of the transmitting and receiving parameters are deduced with the sizes of the anechoic chamber and target. The Pulse compression of the proposed method is performed. Then, the window function is applied to extract the main peaks after Pulse compression. Both the simulation and experimental results are provided to demonstrate the effectiveness of the proposed method in overcoming the coupling between the transmitted and reflected Pulse signals.
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Equivalent simulation method for Pulse Radar countermeasure in RFS
2017 Signal Processing Symposium (SPSympo), 2017Co-Authors: Feng Zhao, Guoyu Wang, Qihua Wu, Jian'an ChenAbstract:Pulse Radar signal is widely used in Radar countermeasure and detection. When Pulse Radar signal is adopted in radio frequency simulation (RFS) for Radar countermeasure, the target echo will return before the Pulse signal is totally transmitted because the size of anechoic chamber is small. The reflected signal and transmitted signal will be coupling and the Radar countermeasure cannot be implemented. In this paper, the interrupted transmitting and receiving (ITR) method is adopted to solve the coupling between transmitted and reflected signal. The equivalent simulation method for Radar countermeasure and detection is proposed. Then, the processing and detection results of ITR echo and complete Pulse Radar echo with typical convolution noise jamming are both compared and analyzed. Simulations are conducted to indicate that the detection results of ITR echo are identical with those obtained by the complete Pulse echo in the same jammer to signal ratio (JSR). Therefore, the proposed simulation method is effective and applicable.
Feng Zhao - One of the best experts on this subject based on the ideXlab platform.
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Experimental study on Pulse Radar target probing in RFS based on interrupted transmitting and receiving
Chinese Journal of Aeronautics, 2018Co-Authors: Qihua Wu, Feng Zhao, Guoyu WangAbstract:Abstract Radar target probing and measurement are challenging tasks for Radio Frequency Simulation (RFS) with Pulse Radar signal. Due to the long-time duration of Pulse Radar signal and the limited space of anechoic chamber, the reflected signal returns before Pulse Radar signal is fully transmitted in RFS. As a consequence, the transmitted and reflected signals are coupled at the receiver. To handle this problem, the Interrupted Transmitting and Receiving (ITR) experiment system is constructed in this paper by dividing the Pulse Radar signal into sub-Pulses. The target echo can be obtained by transmitting and receiving the sub-Pulses intermittently. Furthermore, the principles of ITR are discussed and the target probing experiments are performed with the ITR system. It is demonstrated that the ITR system can overcome the coupling between the reflected and transmitted signals. Based on the target probing results, the performance of Pulse Radar target probing and measurement can be verified in RFS with the ITR system.
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A Novel Strategy for Pulse Radar HRRP Reconstruction Based on Randomly Interrupted Transmitting and Receiving in Radio Frequency Simulation
IEEE Transactions on Antennas and Propagation, 2018Co-Authors: Feng Zhao, Xiaofeng Ai, Guoyu WangAbstract:Target probing based on wideband Pulse Radar is a challenging task for radio frequency simulation (RFS) in anechoic chamber. Due to the long time duration of Pulse Radar signal and the limited space of anechoic chamber, the reflected signal returns before the Pulse Radar signal is fully transmitted, which makes it difficult for the signal reception. As a consequence, the target high-resolution range profile (HRRP) cannot be obtained for target imaging and recognition. In this paper, we propose a novel strategy that contains two steps to solve this problem and obtain the target HRRP. First, the randomly interrupted transmitting and receiving (R-ITR) method is proposed to receive the Pulse Radar signal in RFS. Second, the target HRRP is reconstructed by compressive sensing (CS) since the R-ITR echo is piecewise sparse. The protocol to choose R-ITR parameters and performance of HRRP reconstruction are provided. Simulations and experiments with different R-ITR parameters are also conducted to verify the effectiveness of the proposed method.
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An Equivalent Simulation Method for Pulse Radar Measurement in Anechoic Chamber
IEEE Geoscience and Remote Sensing Letters, 2017Co-Authors: Feng Zhao, Xiaofeng Ai, Guoyu WangAbstract:When a Pulse Radar signal is implemented in a range-limited anechoic chamber for Radar measurement, the transmitted and reflected signal will be coupled at the receiver. To solve this problem and equivalently simulate the whole process of Pulse Radar measurement in an anechoic chamber, the interrupted transmitting and receiving method is proposed in this letter based on interrupted sampling. The constraints of the transmitting and receiving parameters are deduced with the sizes of the anechoic chamber and target. The Pulse compression of the proposed method is performed. Then, the window function is applied to extract the main peaks after Pulse compression. Both the simulation and experimental results are provided to demonstrate the effectiveness of the proposed method in overcoming the coupling between the transmitted and reflected Pulse signals.
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Equivalent simulation method for Pulse Radar countermeasure in RFS
2017 Signal Processing Symposium (SPSympo), 2017Co-Authors: Feng Zhao, Guoyu Wang, Qihua Wu, Jian'an ChenAbstract:Pulse Radar signal is widely used in Radar countermeasure and detection. When Pulse Radar signal is adopted in radio frequency simulation (RFS) for Radar countermeasure, the target echo will return before the Pulse signal is totally transmitted because the size of anechoic chamber is small. The reflected signal and transmitted signal will be coupling and the Radar countermeasure cannot be implemented. In this paper, the interrupted transmitting and receiving (ITR) method is adopted to solve the coupling between transmitted and reflected signal. The equivalent simulation method for Radar countermeasure and detection is proposed. Then, the processing and detection results of ITR echo and complete Pulse Radar echo with typical convolution noise jamming are both compared and analyzed. Simulations are conducted to indicate that the detection results of ITR echo are identical with those obtained by the complete Pulse echo in the same jammer to signal ratio (JSR). Therefore, the proposed simulation method is effective and applicable.
Atsushi Mase - One of the best experts on this subject based on the ideXlab platform.
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Ultrashort-Pulse Radar system for breast cancer detection experiment: Imaging in frequency band
2011 China-Japan Joint Microwave Conference, 2011Co-Authors: Dan Zhang, Atsushi MaseAbstract:Simulation experiment of breast cancer detection has been performed using an ultrashort-Pulse Radar (USPR) system. Breast models for the experiment are made by cooking-oil. We measure reflection data to reconstruct images of the breast models with dielectrics alien objects and discuss the image reconstruction in different frequency bands.
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Multi-objective experiment using ultrashort-Pulse Radar system for breast cancer detection
35th International Conference on Infrared Millimeter and Terahertz Waves, 2010Co-Authors: Dan Zhang, Atsushi MaseAbstract:Simulation experiment of breast cancer detection has been performed using an ultrashort-Pulse Radar. Breast models for the experiment are made from cooking oil or use a commercial made phantom. We measure reflection data in order to reconstruct images of the breast models with different dielectrics alien objects.
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Phantom-model experiment of breast cancer detection using ultrashort-Pulse Radar with compact vivaldi antennas
2010 Asia-Pacific Microwave Conference, 2010Co-Authors: Dan Zhang, Atsushi MaseAbstract:Simulation experiment of breast cancer detection has been performed using an ultrashort-Pulse Radar with compact vivaldi antennas. A synthetic breast phantom and metallic balls or high-k dielectric cubes are used as tumor in our experiment. Image reconstructions of the breast models using reflection data will be presented. We measure reflection data in order to reconstruct images of the breast models with different dielectrics alien objects.
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Simulation experiment of breast cancer detection using an ultrashort-Pulse Radar system
2009 9th International Conference on Electronic Measurement & Instruments, 2009Co-Authors: Dan Zhang, Atsushi MaseAbstract:Simulation experiment of breast cancer detection has been performed using an ultrashort-Pulse Radar. Breast models for the experiment are made from cooking oil or use a commercial made phatom. We measure reflection data in order to reconstruct images of the breast models with different dielectrics alien objects.
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Application of ultrashort-Pulse Radar to non-destructive inspection
2008 11th IEEE International Conference on Communication Technology, 2008Co-Authors: Shinya Takaichi, Atsushi Mase, Yuichiro Kogi, Kang Wook KimAbstract:An ultrashort-Pulse Radar (USPR) has been developed for non-destructive inspection of structures, search of buried objects, and biomedical imaging. An imPulse with 150 ps Pulse width is used as a source for the present USPR. Since the bandwidth of the source is inverse relation to the Pulse width, we can expect wide frequency range in microwave region which benefits high spatial resolution as well as time resolution. Therefore antennas for the USPR are required to provide acceptable characteristic in wide frequency band width. Non-destructive inspection for concrete structures utilizes the contrast in the dielectric properties between cement and air at cracks. In this paper, the comparison of inspected results of the concrete samples are described using three types of antennas, an open-ended rectangular waveguide antenna, a bow-tie antenna, and a log-spiral antenna.
A. Stelzer - One of the best experts on this subject based on the ideXlab platform.
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An Integrated 79 GHz Sequential Sampling Pulse Radar
2019 IEEE MTT-S International Microwave Symposium (IMS), 2019Co-Authors: A. Leibetseder, C. Wagner, A. StelzerAbstract:An integrated 79 GHz low-cost low-power Pulse Radar sensor based on the sequential sampling approach is presented. The proposed Radar sensor is fabricated in a 250-GHz fT SiGe BiCMOS technology and verified by measurements.
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An Integrated Coherent Startup 79-GHz Pulse Oscillator for a Sequential Sampling Pulse Radar
2018 15th European Radar Conference (EuRAD), 2018Co-Authors: A. Leibetseder, C. Wagner, A. StelzerAbstract:An approach to achieve a coherent startup condition, as it is required for the operation of a sequential sampling Pulse Radar, with a differential 79-GHz VCO is presented. The proposed VCO is fabricated in a 250-GHz fT SiGe BiCMOS technology. Theoretical boundaries and results from simulations are verified by measurements. The measured phase jitter of the VCO was less than 1.17 ps rms across the entire tuning range from 77 GHz to 83 GHz.
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Signal model and statistical analysis for the sequential sampling Pulse Radar technique
2008 IEEE Radar Conference, 2008Co-Authors: S. Schuster, S. Scheiblhofer, R. Feger, A. StelzerAbstract:For high-accuracy Radar-based range measurement two commonly applied Radar principles are frequency-modulated continuous-wave (FMCW) and Pulse Radars. In many applications, e.g. liquid level gauging or short-range automotive applications, the latter Radar principle is based on sequential sampling together with a cross correlation technique to alleviate the high demands on the sampling stage as well as the high power consumption of a standard Pulse Radar. The systempsilas mode of operation is well-known. In this paper we present a detailed derivation and discussion of the resulting intermediate frequency (IF) signal model. Furthermore, a derivation and comparison of the best possible round-trip delay time (RTDT) respectively range estimation variances using FMCW, standard Pulse, and the advanced Pulse Radar concept is given by means of the corresponding Cramer-Rao lower bounds (CRLBs). Asymptotically optimal and suboptimal estimators are derived and compared regarding their range estimation variance, threshold level, and computational complexity. Simulation and measurement results show the applicability of the derived bounds and estimators in practice.
D. Zito - One of the best experts on this subject based on the ideXlab platform.
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Planar Differential Antenna Design and Integration With Pulse Radar Microchip Sensor
IEEE Sensors Journal, 2014Co-Authors: D. Zito, D. PepeAbstract:This paper reports the design and integration of a novel planar antenna on FR4 substrate with a system-on-a-chip ultra wideband Pulse Radar in 90-nm CMOS technology packaged in a 32 pin quad flat no-lead package, allowing the implementation of a short-range Pulse Radar sensor for biomedical applications. Functional tests have shown that the Pulse Radar sensor detects three targets with different areas (26 × 26, 13 × 26, and 13 × 13 cm2) for front-back movements up to 2 cm around a distance of 70 cm. Field operational tests show that the Radar sensor allows the contactless detection of the respiratory rate of the persons under test, be they adult (both genders) and infant, for sub-centimeter chest movements up to a distance of 45 cm from the Radar sensor.
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Planar differential antenna for UWB Pulse Radar sensor
2013 IEEE International Conference on Microwaves Communications Antennas and Electronic Systems (COMCAS 2013), 2013Co-Authors: D. Pepe, D. ZitoAbstract:A novel planar differential ultra-wideband (UWB) antenna was designed and implemented on low-cost FR4 substrate and characterized experimentally. The antenna was used in the implementation of a complete UWB Pulse Radar sensor obtained by co-integrating a system-on-a-chip UWB Pulse Radar packaged in QFN32 package with two antennas, one for the transmitter and one for the receiver. The experimental results confirm the predictions obtained by simulations, and the effectiveness of the novel antenna design for the implementation of low-cost short-range Pulse Radar sensor was validated by field operational tests.
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Planar Differential Antenna for Short-Range UWB Pulse Radar Sensor
IEEE Antennas and Wireless Propagation Letters, 2013Co-Authors: D. Pepe, Luigi Vallozzi, Hendrik Rogier, D. ZitoAbstract:A novel planar differential ultrawideband (UWB) antenna was designed and implemented on low-cost FR4 substrate and characterized experimentally. The dedicated design was motivated by the implementation of a UWB Pulse Radar sensor obtained by co-integrating a system-on-a-chip UWB Pulse Radar packaged in QFN32 package with the proposed antenna, one for the transmitter and one for the receiver. The experimental results confirm the predictions obtained by simulations, and the effectiveness of the novel antenna design for the implementation of low-cost short-range Pulse Radar sensor was validated by field operational tests.
