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2006 CIE International Conference on Radar

作者： L.Savy THALES AIRBORNE SYSTEMS 2 rue Gay Lussac 78851 Elancourt Cedex-France

The aim of the paper is to give an overview of capacities and interests of space-time adaptive processing （STAP） for Air to Air *** order to evaluate the benefits of STAP without artefact effects due to the chosen algorithm,a less computation load implementation of the Maximum Likelihood ratio test has been developed and is detailed in the *** of simulations are shown and point out the expected benefits of STAP for clutter reduction in Air to Air operations.

关键词： space time adaptive processing Airborne forward looking radar Clutter cancellation

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A novel repetition space-time coding scheme for mobile FSO systems

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Optoelectronics Letters 2015年第2期11卷 125-129页

作者：黎明曹阳李书明杨绍文 Department of Information Engineering Hubei Normal University School of Electronic Information & Automation Chongqing University of Technology

Considering the influence of more random atmospheric turbulence, worse pointing errors and highly dynamic link on the transmission performance of mobile multiple-input multiple-output （MIMO） free space optics （FSO） communica- tion systems, this paper establishes a channel model for the mobile platform. Based on the combination of Alamouti space-time code and time hopping ultra-wide band （TH-UWB） communications, a novel repetition space-time coding （RSTC） method for mobile 2x2 free-space optical communications with pulse position modulation （PPM） is devel- oped. In particular, two decoding methods of equal gain combining （EGC） maximum likelihood detection （MLD） and correlation matrix detection （CMD） are derived. When a quasi-static fading and weak turbulence channel model are considered, simulation results show that whether the channel state information （CSI） is known or not, the coding sys- tem demonstrates more significant performance of the symbol error rate （SER） than the uncoding. In other words, transmitting diversity can be achieved while conveying the information only through the time delays of the modulated signals transmitted from different antennas. CMD has almost the same effect of signal combining with maximal ratio combining （MRC）. However, when the channel correlation increases, SER performance of the coding 2×2 system de- grades significantly.

关键词： Atmospheric turbulence Broadband networks Channel capacity Channel state information Codes (symbols) Communication channels (information theory) Fading channels Iterative decoding Maximum likelihood MIMO systems Optical communication Pulse position modulation Radio communication Random errors Signal detection Signal encoding space time adaptive processing Telecommunication networks time delay Ultra wideband (UWB)

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Analysis of the Influence of STAP on BOC Signal

Analysis of the Influence of STAP on BOC Signal

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第十一届中国卫星导航年会

作者： Yanxiu Ma Xiaodong Li Zhongzhi Ma Beijing Research Institute of Telemetry

Due to the non-linearity of the space-time adaptive anti-jamming weighting process, satellite signal correlation peaks will inevitably be shifted and distorted, which will cause the receiver positioni

关键词： space time adaptive processing Satellite navigation signal processing Correlation peak analysis Signal distortion suppression BOC modulation signal

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