作者： Xu Tu;Zhang Lei （Radar Research Lab, School of Information and Electronics, Beijing Institute of Technology Radar Research Lab, School of Information and Electronics, Beijing Institute of Technology）

出处： The Journal of Engineering 2019 Vol.2019 No.20 P6995-6999

关键词： polynomials;global positioning system;least squares approximations;support vector machines;wavelet transforms;telecommunication computing;signal detection;gps single-frequency carrier phase;ls-svm;gps single-frequency receivers;cycle-slip detection;wavelet transform;cycle-slip correction;polynomial fitting method;high-precision positioning

摘要： The high-precision positioning of GPS requires to detect and correct the cycle-slips in carrier phase more accurately and efficiently. In order to imp ...

作者： Kai Fang;Da Liu;Yongqing Wang （School of Information and Electronics, Beijing Institute of Technology Beijing Institute of Electronic System Engineering School of Information and Electronics, Beijing Institute of Technology）

出处： The Journal of Engineering 2019 Vol.2019 No.21 P7339-7342

关键词： learning (artificial intelligence);distortion;power amplifiers;power amplifier;communication system;nonlinear characteristics;serious distortion;adaptive learning algorithm;digital pre-distortion structure;indirect learning structure;pre-distorter parameter;pre-distortion device parameters;output signal distortion;in-band distortion

摘要： The power amplifier is an important device in the communication system, and its non-linear characteristics will lead to serious distortion of the outp ...

作者： Hao Zihuan;Zhang Lei （Radar Research Lab, School of Information and Electronics, Beijing Institute of Technology Radar Research Lab, School of Information and Electronics, Beijing Institute of Technology）

出处： The Journal of Engineering 2019 Vol.2019 No.20 P6873-6875

关键词： monte carlo methods;global positioning system;signal detection;doppler effect;assisted gps;coherent integration time;doppler frequency;navigation message;high-sensitive acquisition method;iridium assistance;gps signal;global positioning system signal;iridium-assisted acquisition method;iridium-assisted values of code phase;monte carlo simulation

摘要： Global positioning system (GPS) signal is severely attenuated in indoor, urban, and forest environments. To capture weak GPS signal, long-time coheren ...

作者： Shengheng Liu;Yahui Ma;Tao Shan （School of Information Science and Engineering, Southeast University School of Information and Electronics, Beijing Institute of Technology School of Information and Electronics, Beijing Institute of Technology）

出处： The Journal of Engineering 2019 Vol.2019 No.19 P5619-5621

关键词： parameter estimation;polynomials;signal detection;frequency modulation;signal sampling;transforms;coprime sampling;parameter estimation;low unambiguously detectable range;single segmentation set;LFM signal detection;chirp rate estimation;DPT approaches;segmented discrete polynomial-phase transform;linear frequency modulated signal detection;Chinese remainder theorem

摘要： Segmented discrete polynomial-phase transform (DPT) integrates input signals to enable detection and parameter estimation of weak linear frequency mod ...

作者： Xianle Cao;Yi Liu;Dongfang Hu （School of Information and Electronics, Beijing Institute of Technology School of Information and Electronics, Beijing Institute of Technology Beijing Galaxy Information&Communication Technology Co, Itd）

出处： The Journal of Engineering 2019 Vol.2019 No.21 P7370-7375

关键词： demodulation;mimo communication;approximation theory;maximum likelihood estimation;quadrature amplitude modulation;computational complexity;decoding;error statistics;distance computing;log-likelihood ratio;simplified algorithm;m-qam demodulation;simplified llr algorithm;distance calculation

摘要： Here, a simplified algorithm to calculate log-likelihood ratio (LLR) for m-QAM demodulation is proposed. Traditional method calculating LLR for m-QAM ...

作者： Weijie Ye;Xiaopeng Yang;Yuze Sun;Shuai Li （School of Information and Electronics, Beijing Institute of Technology, and Key Laboratory of Electronic and Information Technology in Satellite Navigation (Beijing Institute of Technology), Ministry of Education School of Information and Electronics, Beijing Institute of Technology, and Key Laboratory of Electronic and Information Technology in Satellite Navigation (Beijing Institute of Technology), Ministry of Education Department of Electronic Engineering, Tsinghua University School of Information and Electronics, Beijing Institute of Technology, and Key Laboratory of Electronic and Information Technology in Satellite Navigation (Beijing Institute of Technology), Ministry of Education）

出处： The Journal of Engineering 2019 Vol.2019 No.19 P6309-6312

关键词： white noise;radar signal processing;space-time adaptive processing;jamming;radar clutter;encoding;radiofrequency interference;chirp signal;bi-phase random-coded signal;random sequence;antijamming method;scattered-wave sweeping frequency jamming;space-time adaptive processing

摘要： The scattered-wave sweeping frequency jamming occupies many space-time adaptive processing (STAP) degrees of freedom, which results in a serious decli ...

作者： Xiaoyan Chen;Yuze Sun;Feng Xu;Xiaopeng Yang （School of Information and Electronics, Beijing Institute of Technology, and Key Laboratory of Electronic and Information Technology in Satellite Navigation (Beijing Institute of Technology), Ministry of Education Department of Electronic Engineering, Tsinghua University School of Information and Electronics, Beijing Institute of Technology, and Key Laboratory of Electronic and Information Technology in Satellite Navigation (Beijing Institute of Technology), Ministry of Education School of Information and Electronics, Beijing Institute of Technology, and Key Laboratory of Electronic and Information Technology in Satellite Navigation (Beijing Institute of Technology), Ministry of Education）

出处： The Journal of Engineering 2019 Vol.2019 No.19 P6318-6321

关键词： phased array radar;particle swarm optimisation;radar signal processing;radar antennas;linear antenna arrays;particle swarm optimisation;hardware cost;system complexity;multiple performance parameters optimisation method;multiobjective optimisation problem;single-objective problem;signal processing performances;linear array;large array antennas;subarray partition method;dynamic inertia weights;learning factors;large aperture phased array radar

摘要： In order to reduce hardware cost and system complexity, sub-array partition is necessary for large array antennas. Traditional sub-array partition met ...

作者： Cheng Hu;Zhiyang Chen;Xichao Dong;Chang Cui;Chang Cui;Yuanhao Li （Radar Research Lab, School of Information and Electronics, Beijing Institute of Technology Radar Research Lab, School of Information and Electronics, Beijing Institute of Technology Radar Research Lab, School of Information and Electronics, Beijing Institute of Technology Radar Research Lab, School of Information and Electronics, Beijing Institute of Technology Radar Research Lab, School of Information and Electronics, Beijing Institute of Technology Radar Research Lab, School of Information and Electronics, Beijing Institute of Technology）

出处： The Journal of Engineering 2019 Vol.2019 No.19 P5846-5849

关键词： synthetic aperture radar;MIMO radar;mostatic SAR;GAF;amplitude items;range direction;azimuth direction;formation scale;envelope items;EPC position;formation centre;linear combination expression;generalised ambiguity function analysis;distributed MIMO synthetic aperture radar;code resources;distributed synthetic aperture radar;distributed SAR;bistatic SAR;equivalent phase centre;space resources;frequency resources;time resources

摘要： The abundant space, time, frequency and code resources of distributed multiple-input multiple-output (MIMO) synthetic aperture radar (SAR) enables it ...

作者： Cheng Hu;Bin Zhang;Xichao Dong;Yuanhao Li;Yuanhao Li;Chang Cui （Radar Research Lab, School of Information and Electronics, Beijing Institute of Technology Radar Research Lab, School of Information and Electronics, Beijing Institute of Technology Radar Research Lab, School of Information and Electronics, Beijing Institute of Technology Radar Research Lab, School of Information and Electronics, Beijing Institute of Technology Radar Research Lab, School of Information and Electronics, Beijing Institute of Technology Radar Research Lab, School of Information and Electronics, Beijing Institute of Technology）

出处： The Journal of Engineering 2019 Vol.2019 No.20 P6359-6363

关键词： data acquisition;radar interferometry;radar imaging;remote sensing by radar;geophysical image processing;synthetic aperture radar;geophysical techniques;tomography;multipass geosynchronous sar tomography;geosynchronous sar tomography techniques;multipass sar acquisitions;fully 3d images;low earth orbit sar case;3d imaging accuracy;geo tomosar data;leo tomosar;imaging performance;optimal minimal rotation-induced decorrelation data acquisition method;geo tomosar techniques

摘要： Geosynchronous SAR tomography (GEO TomoSAR) techniques exploit multi-pass SAR acquisitions of the same scene, taken with slightly different view angle ...

作者： Jia-fei ZHAO，Hong-min GAO，Rong-kun JIANG，Xue-tian WANG （School of Information and Electronics,Beijing Institute of Technology）

出处： 2019 International Conference on Computational Modeling,Simulation and Optimization(CMSO 2019) 中国北京 2019

会议录： Proceedings of 2019 International Conference on Computational Modeling,Simulation and Optimization(CMSO 2019)

摘要： The typical models, namely, Hybrid(HYB) model, Technology Service Corporation(TSC) model, and Naval Research Laboratory(NRL) model, reveal a large dev ...