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cross-correlation-noise
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Investigating the impact of correlated white noises on the bistability behavior in an optical three-level bistable system
, Article Journal of the Optical Society of America B: Optical Physics ; Volume 32, Issue 1 , 2015 , Pages 76-82 ; 07403224 (ISSN) ; Sadighi Bonabi, R ; Sharif University of Technology
Abstract
The effect of correlated white noises on the optical bistability behavior of three-level atomic systems is theoretically investigated. Noise-induced bistability is demonstrated in an atomic optical bistable system consisting of three-level atoms in Ë-type configurations confined in an optical ring cavity. The output field as a result of enhanced Kerr nonlinearity induced by atomic coherence in the electromagnetically induced transparency system is variable due to the noises in laser parameters and the cooperativity parameter. Therefore, noise is mainly responsible for such induced bistability in the system. It is found that with the cross-correlation noises, the hysteresis loop of optical...
MIMO-SAR waveform design using modified costas pulses
, Article Proceedings of EUSAR 2016: 11th European Conference on Synthetic Aperture Radar, 6 June 2016 through 9 June 2016 ; 2016 ; 9783800742288 (ISBN) ; Bastani, M. H ; Nayebi, M. M ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc
2016
Abstract
In this paper, the problem of designing waveform for MIMO-SAR systems is investigated. The family of modified Costas pulses (MCP) are used because of their advantages. However, a MIMO-SAR system will not be beneficial unless the waveforms transmitted through different antennas are orthogonal, even under different delay/Doppler shifts. An iterative algorithm is proposed that finds a set of MCPs and guarantees that the maximum cross-correlation (under different Doppler/delay shifts) among different waveforms is below a threshold. Simulation results show that the proposed waveform design outperforms the conventional one in terms of orthogonality, resolution, and signal-Tointerference-plus-noise...