Results 241 to 250 of about 245,084 (285)
Some of the next articles are maybe not open access.
Multi-modal OFDM waveform design
2013 IEEE Radar Conference (RadarCon13), 2013Due to limitations in the bandwidth resources, sharing the spectrum across several modalities has become increasingly important. In this paper, we will consider OFDM spectral sharing between radar and wireless communication systems. We will define and compute the importance of each sub-carrier to both the modalities by considering the radar detection ...
Sandeep Gogineni +2 more
openaire +1 more source
1999
Detection performance is optimized and range and doppler both improved by maximizing the SNR. Since this needs the pulse to have high energy, long pulses are required unless a very high power transmitter is available. Long pulses also permit good doppler accuracy, but, for simple pulses, give poor range accuracy.
openaire +1 more source
Detection performance is optimized and range and doppler both improved by maximizing the SNR. Since this needs the pulse to have high energy, long pulses are required unless a very high power transmitter is available. Long pulses also permit good doppler accuracy, but, for simple pulses, give poor range accuracy.
openaire +1 more source
2014
Abstract A confluence of steady advances in radar enabling technologies, and ever increasing demands on radar performance in challenging environments, has afforded a re-examination of the fundamental theoretical framework upon which classical waveform design is based.
openaire +1 more source
Abstract A confluence of steady advances in radar enabling technologies, and ever increasing demands on radar performance in challenging environments, has afforded a re-examination of the fundamental theoretical framework upon which classical waveform design is based.
openaire +1 more source
Waveform design for dispersive SAR
2016 URSI International Symposium on Electromagnetic Theory (EMTS), 2016Electromagnetic pulses that travel through dispersive and lossy material may change their shape and lose a significant amount of energy. This distortion complicates imaging through dispersive and lossy material. Waveform design is one aspect to consider when trying to improve imaging capabilities.
Natalie A. Cartwright, Kaitlyn Muller
openaire +1 more source
Wideband MIMO Radar Waveform Design
IEEE Transactions on Signal Processing, 2019We consider the design of wideband multiple-input multiple-output (MIMO) radar waveforms to approximate a desired beampattern and achieve prescribed space-frequency nulling in a space-frequency region of interest. A general design model involving modulus, power, and energy constraints on the probing waveforms is introduced.
Xianxiang Yu +4 more
openaire +1 more source
Waveform design for electroseismic exploration
SEG Technical Program Expanded Abstracts 2005, 2005In earlier work, we described field tests that successfully detected electromagnetic-to-seismic (ES) conversions from gas sands and carbonate reservoirs. ES conversion amplitudes measure the electric properties of permeable rock with near-seismic resolution. This information is a new indicator of hydrocarbons.
Scott C. Hornbostel, A. H. Thompson
openaire +1 more source
Classical radar waveform design
2012The waveform determines the delay-Doppler response of a radar system. From that response, one can derive the radar's range and velocity resolution and their ambiguities. This chapter explains the concept and motivation for pulse compression. It then describes narrow-band signals and their major signal processing and analysis tools - the matched filter ...
openaire +1 more source
Waveform Design for MIMO Radars
IEEE Transactions on Aerospace and Electronic Systems, 2007We consider the problem of waveform design for multiple input/multiple output (MIMO) radars, where the transmit waveforms are adjusted based on target and clutter statistics. A model for the radar returns which incorporates the transmit waveforms is developed. The target detection problem is formulated for that model.
openaire +1 more source
Discrete Frequency-Coding Waveform Design
2007 14th IEEE International Conference on Electronics, Circuits and Systems, 2007A modified simulated annealing algorithm (MSAA) is proposed to design discrete frequency-coding (DFC) sequence sets with good autocorrelation and crosscorrelation properties. The proposed algorithm is a combination of simulated annealing and Hamming scan algorithm.
S.P Singh, K Subba Rao
openaire +1 more source
Adaptive waveform design for tracking
2012Waveform-agile design approaches for target tracking involve the adaptive configuration of the next transmit waveform by optimizing some cost function such as the predicted mean-squared tracking estimation error. These approaches are shown to be advantageous for complex radar tracking, such as when the received waveforms have originated from multipath ...
Antonia Papandreou-Suppappola +5 more
openaire +1 more source