Results 201 to 210 of about 45,007 (228)
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Assessment of Constant Envelope OFDM as a Class of Random FM Radar Waveforms
2020 IEEE Radar Conference (RadarConf20), 2020Random FM radar waveforms designed to possess a desirable spectral shape (on average) have been experimentally demonstrated for an increasing number of applications. However, the benefits of these waveforms can be offset by the computational cost of performing real-time spectral-shaping optimization for each random initial waveform.
Erik R. Biehl +3 more
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Fast computations of constant envelope waveforms for MIMO radar transmit beampattern
2010 IEEE Radar Conference, 2010Designing transmit beampattern with MIMO radars generally requires the waveforms to be able to have arbitrary cross-correlation values. In contrast to the available algorithms, the proposed technique provides a closed-form solution for the synthesis of covariance matrix, R, of the waveforms to obtain desired beampattern match.
Sajid Ahmed +3 more
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Multicarrier radar signals with low peak-to-mean envelope power ratio
IEE Proceedings - Radar, Sonar and Navigation, 2003A multicarrier phase-coded (MCPC) pulse consists of N sequences of M bits each. The N sequences modulate N carriers that are transmitted simultaneously. The carriers are equally spaced. The carrier separation Df equals the inverse of the bit duration tb forming orthogonal frequency division multiplexing (OFDM).
E. Mozeson, N. Levanon
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Constant envelope fractional fourier transform based waveform libraries for MIMO radar
2014 Sensor Signal Processing for Defence (SSPD), 2014In this paper an efficient technique to generate novel libraries of phase-coded waveforms with constant envelope aimed at optimizing signal retrieval is presented. The modulation technique is based on the Fractional Fourier Transform (FrFT), where the signal waveforms retain their constant modulus.
Ilioudis, Christos V. +3 more
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Non-Contact Respiration Rate Estimation using 24 GHz Pulse Radar Employing Envelope Detection
2020 IEEE International RF and Microwave Conference (RFM), 2020Recently, there are a lot of interest in utilizing radar technology to realize non-contact respiration rate (RR) measurements. This paper presents an RR estimation using a 24 GHz pulse radar employing an envelope detection on the IF signal at the receiver.
Suraya Zainuddin +5 more
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Full Waveform Inversion of Cross-hole Radar Data Using Envelope Objective Function
2018 17th International Conference on Ground Penetrating Radar (GPR), 2018The full waveform inversion (FWI) has been used as a high resolution imaging method for cross-hole radar inversion implementation, however, when FWI is used to process field data, it encounters a variety of problems and causes the inversion to fall into a local minimum. One problem is that the GPR data lacks low frequency information.
Xintong Liu, Sixin Liu, Lei Fu
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Distortions of the radar signals envelope
Achievements of Modern Radioelectronics, 2022N.А. Kushnerev +2 more
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Effect of envelope limiting in pulse-compression moving-target-indicator radar systems
Proceedings of the Institution of Electrical Engineers, 1972Computer simulations are used to study the effect of envelope limiting on the performance of pulse-compression moving-target-indicator (m.t.i.) radar in the presence of clutter produced by stationary reflectors and nonstationary reflectors. It is shown that the use of pre-envelope concepts to deal with bandpass processes as complex lowpass envelopes ...
C.M. Thorsteinson +2 more
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Search and track coordination in multi-ship multi-radar systems using schedulability envelope
Real-Time Systems, 2007This paper addresses the search and track coordination problems of multiple shipboard radars. The proposed approach first exploits the physical characteristics of a single phased array radar to improve its effective capacity. Its effective capacity is abstracted by a closed-form equation called a schedulability envelope.
Phil-Su Kang, Chang-Gun Lee
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An Envelope Alignment Method for Terahertz Radar ISAR Imaging of Maneuvering Targets
2016A novel envelope alignment technique for terahertz radar ISAR imaging of maneuvering targets is presented in this paper. This method selects a single pulse echo as the envelope alignment benchmark through the correlation coefficient of adjacent range profiles, which solves the problems of jump error and drift error in the conventional adjacent ...
Tong Liu, Zongjie Cao, Rui Min
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