نتایج جستجو برای: side lobe canceller

تعداد نتایج: 265719  

2014
Jian Li John Anderson

In this paper, we present the Synchronous Impulse Reconstruction Radar (SIRE) Ultra-wideband (UWB) radar designed by the Army Research Lab (ARL) for landmine and improvised explosive device (IED) detection as a 2 by 16 MIMO radar (with collocated antennas). Its improvement over its SIMO counterpart in terms of beampattern/cross range resolution are discussed and demonstrated using simulated dat...

2014
Jian Li John Anderson

In this paper, we present the Synchronous Impulse Reconstruction Radar (SIRE) Ultra-wideband (UWB) radar designed by the Army Research Lab (ARL) for landmine and improvised explosive device (IED) detection as a 2 by 16 MIMO radar (with collocated antennas). Its improvement over its SIMO counterpart in terms of beampattern/cross range resolution are discussed and demonstrated using simulated dat...

2013
Hiromichi Ishii Shinpei Ogino Koki Ikemoto Atsushi Toma Kenji Nakamura Tsuyoshi Itoh Toshiya Ochiai

BACKGROUND Mesohepatectomy with total resection of the caudate lobe and extrahepatic bile duct is sometimes performed for hilar cholangiocarcinoma or gallbladder carcinoma; however, only a few reports on mesohepatectomy with total caudate lobectomy of the liver for hepatocellular carcinoma are available. METHODS A 71-year-old woman was preoperatively diagnosed with hepatocellular carcinoma in...

2017
Yituo Wang Lubin Wang Penggang Qiao Fugeng Sheng Cong Han Enmao Ye Yu Lei Feng Yan Shanshan Chen Yuyang Zhu Guiyun Mi Gongjie Li Zheng Yang

The impact of chronic cerebral hypoperfusion on resting-state blood oxygen level-dependent signal fluctuations remains unknown. We aimed to determine whether chronic ischemia induces changes in amplitude of low-frequency fluctuations (ALFF) and to investigate the correlation between ALFF and perfusion-weighted magnetic resonance imaging (PWI) parameters in patients with moyamoya disease (MMD). ...

2007
Xin Zhang Wee Ser Zhang Zhang Anoop Kumar Krishna

Frequency-Invariant (FI) beamformer is a type of beamformer that has flat spatial response over a wide range of frequency. In most of the algorithms presented today, this FI characteristic is true for all angles including both main lobe and side lobe. In this paper, a novel uniform circular broadband beamformer with frequency-invariant characteristic is proposed. It attempts to optimize the FI ...

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