The Experts below are selected from a list of 3246 Experts worldwide ranked by ideXlab platform

C Romano - One of the best experts on this subject based on the ideXlab platform.

  • microwave breast imaging with a Monostatic Radar based system a study of application to patients
    IEEE Transactions on Microwave Theory and Techniques, 2013
    Co-Authors: Elise C Fear, Jeremie Bourqui, Charlotte Curtis, B Docktor, C Romano
    Abstract:

    A prototype microwave breast imaging system is used to scan a small group of patients. The prototype implements a Monostatic Radar-based approach to microwave imaging and utilizes ultra-wideband signals. Eight patients were successfully scanned, and several of the resulting images show responses consistent with the clinical patient histories. These encouraging results motivate further studies of microwave imaging for breast health assessment.

Adib Y. Nashashibi - One of the best experts on this subject based on the ideXlab platform.

  • A novel bistatic scattering matrix measurement technique using a Monostatic Radar
    IEEE Transactions on Antennas and Propagation, 1996
    Co-Authors: Kamal Sarabandi, Adib Y. Nashashibi
    Abstract:

    Presents a new technique for measuring the bistatic scattering matrix of point targets using a Monostatic Radar. In this technique, the complexity of the traditional bistatic measurement setup and difficulties in retaining the phase coherence between the transmitter and the receiver are circumvented completely. The bistatic measurement is performed using a wideband, polarimetric, Monostatic Radar in conjunction with a rotatable ground plane positioned behind the target. Assuming that the distance between the target and the ground plane is larger than the Radar resolution, the desired bistatic response (image contribution) can be isolated from the unwanted backscatter. Noting that the Radar operates in the backscatter mode and using the reciprocity theorem, it is shown that the measured cross-polarized responses (/spl sigma//sub vh/and /spl sigma//sub hv/) cannot be determined uniquely. To rectify this problem, additional independent measurements are required. Additional equations for characterizing the cross-polarized components are obtained by placing an anisotropic lossless slab over the perfectly conducting flat surface. The validity and accuracy of the new bistatic measurement technique is demonstrated by measuring a number of point targets with known theoretical bistatic responses. Also, a new approach for determining the effective dielectric constant of dense random media based on the new bistatic measurement technique is developed.

  • A bistatic measurement technique for characterization of the effective dielectric constant of random media using a Monostatic Radar
    Proceedings of the 1996 IEEE National Radar Conference, 1
    Co-Authors: Adib Y. Nashashibi, Kamal Sarabandi
    Abstract:

    A new technique for measuring the effective dielectric constant of dense random media is presented. In this technique, the mean bistatic scattered fields of a cluster of random media, confined in a geometrical boundary, are measured using a Monostatic Radar and a rotatable ground plane and fitted to the bistatic scattered fields of a homogeneous lossy material with the same geometrical boundary. The accuracy of the bistatic measurement technique is verified by measuring the bistatic response of a number of canonical targets with known theoretical responses. The ability of the new technique in estimating the effective dielectric constant of a cluster of dense random media is demonstrated.

Jing-nan Liu - One of the best experts on this subject based on the ideXlab platform.

  • Comparison of Radar waveforms combining pseudo-random binary phase coding and chirp modulation for an high-frequency Monostatic Radar
    IET Radar Sonar & Navigation, 2016
    Co-Authors: Shuzhu Shi, Zhengyu Zhao, Jing-nan Liu
    Abstract:

    Wuhan ionospheric oblique backscattering sounding system (WIOBSS) is a low-power high-frequency Monostatic Radar used for ionospheric sensing and aircraft detection. In this study, a novel waveform combining the pseudo-random binary phase coding (PRBPC) and the chirp modulation is proposed for this Radar. Furthermore, in terms of the Radar waveform requirements, four subclasses of this waveform are theoretically compared to determine which one of them is most suitable for WIOBSS, including the inter-pulse PRBPC waveform where the width of the subpulse is equal to the chirp duration, the inter-pulse PRBPC waveform where the period of the coding sequence is equal to the chirp duration, the intra-pulse PRBPC waveform where the width of the subpulse is equal to the chirp duration, and the intra-pulse PRBPC waveform where the period of the coding sequence is equal to the chirp duration. The Radar waveform requirements, the ambiguity function analysis, and the performance comparison of aforementioned waveforms are described. The analysis results show that the inter-pulse PRBPC waveform where the period of the coding sequence is equal to the chirp duration has the best performance, and can achieve higher range resolution, larger signal processing gain, and better Doppler tolerance than the conventional binary phase coded waveforms.

  • A Novel Radar Waveform Design for a Low-Power HF Monostatic Radar
    IEEE Geoscience and Remote Sensing Letters, 2015
    Co-Authors: Shuzhu Shi, Zhengyu Zhao, Guobin Yang, Jing-nan Liu
    Abstract:

    In this letter, a novel Radar waveform is proposed for a low-power high-frequency Monostatic Radar used for ionospheric sensing and aircraft detection. In this proposed waveform, a hybrid modulation scheme is adopted, where the pulse-to-pulse phase is coded by the WG sequence, and the frequency of each subpulse is linearly modulated with a fixed chirp rate. Compared with the conventional binary-phase-coded waveform, larger signal processing gain, higher range resolution, and lower range sidelobes can be simultaneously achieved with the proposed waveform. Furthermore, it is more insensitive to the Doppler shifts and is not subject to significant range-Doppler cross coupling. With this newly proposed waveform, the ionospheric backscatter ionogram with clear leading and trailing edges can be obtained in the range of 500–2300 km, and the aircraft target can be also clearly detected.

Zhengyu Zhao - One of the best experts on this subject based on the ideXlab platform.

  • Comparison of Radar waveforms combining pseudo-random binary phase coding and chirp modulation for an high-frequency Monostatic Radar
    IET Radar Sonar & Navigation, 2016
    Co-Authors: Shuzhu Shi, Zhengyu Zhao, Jing-nan Liu
    Abstract:

    Wuhan ionospheric oblique backscattering sounding system (WIOBSS) is a low-power high-frequency Monostatic Radar used for ionospheric sensing and aircraft detection. In this study, a novel waveform combining the pseudo-random binary phase coding (PRBPC) and the chirp modulation is proposed for this Radar. Furthermore, in terms of the Radar waveform requirements, four subclasses of this waveform are theoretically compared to determine which one of them is most suitable for WIOBSS, including the inter-pulse PRBPC waveform where the width of the subpulse is equal to the chirp duration, the inter-pulse PRBPC waveform where the period of the coding sequence is equal to the chirp duration, the intra-pulse PRBPC waveform where the width of the subpulse is equal to the chirp duration, and the intra-pulse PRBPC waveform where the period of the coding sequence is equal to the chirp duration. The Radar waveform requirements, the ambiguity function analysis, and the performance comparison of aforementioned waveforms are described. The analysis results show that the inter-pulse PRBPC waveform where the period of the coding sequence is equal to the chirp duration has the best performance, and can achieve higher range resolution, larger signal processing gain, and better Doppler tolerance than the conventional binary phase coded waveforms.

  • A Novel Radar Waveform Design for a Low-Power HF Monostatic Radar
    IEEE Geoscience and Remote Sensing Letters, 2015
    Co-Authors: Shuzhu Shi, Zhengyu Zhao, Guobin Yang, Jing-nan Liu
    Abstract:

    In this letter, a novel Radar waveform is proposed for a low-power high-frequency Monostatic Radar used for ionospheric sensing and aircraft detection. In this proposed waveform, a hybrid modulation scheme is adopted, where the pulse-to-pulse phase is coded by the WG sequence, and the frequency of each subpulse is linearly modulated with a fixed chirp rate. Compared with the conventional binary-phase-coded waveform, larger signal processing gain, higher range resolution, and lower range sidelobes can be simultaneously achieved with the proposed waveform. Furthermore, it is more insensitive to the Doppler shifts and is not subject to significant range-Doppler cross coupling. With this newly proposed waveform, the ionospheric backscatter ionogram with clear leading and trailing edges can be obtained in the range of 500–2300 km, and the aircraft target can be also clearly detected.

  • A Novel Radar Waveform for Monostatic Ionosonde
    IEEE Geoscience and Remote Sensing Letters, 2011
    Co-Authors: Zhengyu Zhao, Fanfan Su, Zuowei He, Shipeng Li, Ting Li, Shuo Huang, Guobin Yang, Gang Chen, Ning Li, Tianyao Pu
    Abstract:

    Monostatic Radar, whether using interpulse or intrapulse coded pulse trains, will suffer from the blind zones caused by eclipsing. This letter proposes a novel biphase interpulse coded Radar waveform using diverse Pulse Repetition Intervals (PRIs) instead of a consistent PRI within each coherent processing interval (CPI). This waveform can achieve long unambiguous range, high-range resolution and high Doppler resolution without blind zones, and is specially suitable for a Monostatic ionosonde.

Guobin Yang - One of the best experts on this subject based on the ideXlab platform.

  • A Novel Radar Waveform Design for a Low-Power HF Monostatic Radar
    IEEE Geoscience and Remote Sensing Letters, 2015
    Co-Authors: Shuzhu Shi, Zhengyu Zhao, Guobin Yang, Jing-nan Liu
    Abstract:

    In this letter, a novel Radar waveform is proposed for a low-power high-frequency Monostatic Radar used for ionospheric sensing and aircraft detection. In this proposed waveform, a hybrid modulation scheme is adopted, where the pulse-to-pulse phase is coded by the WG sequence, and the frequency of each subpulse is linearly modulated with a fixed chirp rate. Compared with the conventional binary-phase-coded waveform, larger signal processing gain, higher range resolution, and lower range sidelobes can be simultaneously achieved with the proposed waveform. Furthermore, it is more insensitive to the Doppler shifts and is not subject to significant range-Doppler cross coupling. With this newly proposed waveform, the ionospheric backscatter ionogram with clear leading and trailing edges can be obtained in the range of 500–2300 km, and the aircraft target can be also clearly detected.

  • A Novel Radar Waveform for Monostatic Ionosonde
    IEEE Geoscience and Remote Sensing Letters, 2011
    Co-Authors: Zhengyu Zhao, Fanfan Su, Zuowei He, Shipeng Li, Ting Li, Shuo Huang, Guobin Yang, Gang Chen, Ning Li, Tianyao Pu
    Abstract:

    Monostatic Radar, whether using interpulse or intrapulse coded pulse trains, will suffer from the blind zones caused by eclipsing. This letter proposes a novel biphase interpulse coded Radar waveform using diverse Pulse Repetition Intervals (PRIs) instead of a consistent PRI within each coherent processing interval (CPI). This waveform can achieve long unambiguous range, high-range resolution and high Doppler resolution without blind zones, and is specially suitable for a Monostatic ionosonde.