Results 191 to 200 of about 45,125 (224)
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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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2007 41st Annual Conference on Information Sciences and Systems, 2007
Constant envelope orthogonal frequency-division multiplexing (CE-OFDM) is evaluated as a potential wideband radar pulse compression modulation using ambiguity function analysis.
John P. Stralka, Gerard G. L. Meyer
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Constant envelope orthogonal frequency-division multiplexing (CE-OFDM) is evaluated as a potential wideband radar pulse compression modulation using ambiguity function analysis.
John P. Stralka, Gerard G. L. Meyer
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High-precision ranging for radar micro-motion target based on envelope migration
2016 CIE International Conference on Radar (RADAR), 2016Phase-Derived-Range, a radar range method based on echo phases, is highly evaluated for its root-mean-square (rms) error within half of wavelength and great used on highly precision ranging for micro-motion target. There are two technical challenges, which are ambiguous Doppler phase acquisition and ambiguity resolution.
Zhongshuai Zhang +3 more
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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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Envelope Detection for an ADC-Relaxed Double-Sideband Low-IF CW Doppler Radar
IEEE Transactions on Microwave Theory and Techniques, 2018In this paper, we propose a new envelope detection (ED) method to reduce the analog-to-digital converters’ (ADCs) sampling rate from 20 kHz to 20 Hz in a double-sideband low-intermediate-frequency (IF) continuous-wave Doppler radar. Compared with the conventional synchronous demodulation (SD) method, which typically consumes a large amount of ADC ...
Xujun Ma +4 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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