Results 201 to 210 of about 63,321 (235)

Envelope detection for a double-sideband Low IF CW radar

2018 IEEE/MTT-S International Microwave Symposium - IMS, 2018
The requirement to detect weak physiology motion by Doppler radar arises new architectures utilizing low intermediate frequency (IF) to achieve high signal-to-noise ratio (SNR). With the help of low IF, the significant motion information is modulated to IF domain, promoting the system's resistivity to both noise impact and AC distortion.
Xujun Ma, Jenshan Lin, Xiaohu You, Lianming Li   +3 more
openaire   +2 more sources

Constant envelope chirped OFDM for power-efficient radar communication

2016 IEEE Information Technology, Networking, Electronic and Automation Control Conference, 2016
In increasing radar performance, radar waveform and waveform attributes are key elements. Among different waveforms, Linear Frequency Modulation (LFM) or simply chirp waveform attains best performance in terms of Doppler tolerance and time resolution.
Mussa Ally Dida, Tao Ran, Huan Hao, Xi Wang   +3 more
openaire   +2 more sources

Finite Alphabet Constant-Envelope Waveform Design for MIMO Radar

IEEE Transactions on Signal Processing, 2011
The design of waveforms with specified auto- and cross-correlation properties has a number of applications in multiple-input multiple-output (MIMO) radar beampattern design. In this work, two algorithms are proposed to generate finite alphabet constant-envelope (CE) waveforms with required cross-correlation properties.
Sajid Ahmed, Yvan Petillot, Bernard Mulgrew, John Thompson   +3 more
openaire   +2 more sources

Synthetic aperture radar imaging simulator for pulse envelope evaluation

Journal of Applied Remote Sensing, 2017
A simulator for spotlight synthetic aperture radar (SAR) image formation is presented. The simulator produces radar returns from a virtual radar positioned at an arbitrary distance and altitude. The radar returns are produced from a source image, where the return is a weighted summation of linear frequency-modulated (LFM) pulse signals delayed by the ...
Eric J. Balster, Frank A. Scarpino, Kerry L. Hill, Andrew M. Kordik   +3 more
openaire   +2 more sources

Multicarrier constant envelope OFDM signal design for radar applications

AEU - International Journal of Electronics and Communications, 2010
Abstract Orthogonal frequency division multiplexing (OFDM) radar signals have been introduced for high range resolution radars. These signals have prominent properties such as favorable ambiguity function, high bandwidth efficiency, and possibility of use in dual mode radar/communication systems.
Reza Mohseni, Reza Mohseni, Abbas Sheikhi, Mohammad Ali Masnadi-Shirazi   +3 more
openaire   +2 more sources

Fast computations of constant envelope waveforms for MIMO radar transmit beampattern

2010 IEEE Radar Conference, 2010
Designing 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, John Scott Thompson, Bernard Mulgrew, Yvan Petillot   +3 more
openaire   +3 more sources

Reduction of Envelope Fluctuations in OFDM Radar Signals Using Coding Technique

2018 International Conference on Communication and Signal Processing (ICCSP), 2018
The design of waveforms play an important role in the performance of radar systems. Multicarrier complementary phase-coded signal has been a field of interest for many researchers due to its prominent properties. This paper aims to reduce the Peak-to-Mean Envelope Power Ratio (PMEPR) of a Multicarrier Complementary Phase-Coded (MCPC) signal consisting ...
N. N. S. S. R. K. Prasad, B.R Prajwal, R Keerthana, S Meghna, G.B Druva Sagar, C. G. Raghavendra   +5 more
openaire   +2 more sources

MIMO radar sequence design with constant envelope and low correlation side-lobe levels

AEU - International Journal of Electronics and Communications, 2021
Abstract Transmit sequence design plays a significant role in multiple-input multiple-output (MIMO) radar to suppress correlation function side-lobe levels. This paper investigates two practical constraints, namely, constant envelope constraint to reduce the effect of nonlinear amplifiers, and low side-lobe levels to reduce the effect of interference
Ankur Thakur, Davinder S. Saini
openaire   +2 more sources

A 24-GHz transceiver with RF power envelope digital control for automotive radar ICs [PDF]

2017 12th European Microwave Integrated Circuits Conference (EuMIC), 2017
This paper presents a 24-GHz transceiver with power envelope digital control for automotive radar sensor applications. The transceiver features three I/Q low-noise receivers, an on-chip voltage-controlled oscillator, frequency divider and an amplification chain delivering 13-dBm output power from a 3.3-V supply voltage.
Gesualdo Alessi, Salvatore Scaccianoce, A. Di Mauro, E. Susino, Angela Bruno, A. Scuderi, G. Maiellaro, N. Micalizzi, Antonino Calcagno   +8 more
openaire   +1 more source

Constant envelope robust waveform design for MIMO radar for parameter estimation

2017 IEEE 9th International Conference on Communication Software and Networks (ICCSN), 2017
In MIMO radar, due to the inaccuracy of the prior information, the waveform designed according to the prior information can not meet the need of parameter estimation. A method of constant envelope robust waveform design for MIMO radar based on maximum mutual information (MI) criterion is proposed for this problem.
Yang Gong, Chen Cui, Congyi Sun
openaire   +2 more sources