A New Approach for Time Reversal Communication over Doubly Spread Channels

2014 ◽  
Author(s):  
Wen Xu ◽  
Tian Zhou ◽  
Huifang Chen
Keyword(s):  
Time Reversal ◽  
New Approach ◽  
Doubly Spread Channels ◽  
Spread Channels

Time reversal communication over doubly spread channels

2013 ◽  
Vol 134 (5) ◽  
pp. 4033-4033 ◽  
Author(s):  
Wen-Jun Zeng ◽  
Xue Jiang
Keyword(s):  
Time Reversal ◽  
Doubly Spread Channels ◽  
Spread Channels

Time reversal communication over doubly spread channels

2012 ◽  
Vol 132 (5) ◽  
pp. 3200-3212 ◽  
Author(s):  
Wen-Jun Zeng ◽  
Xue Jiang
Keyword(s):  
Time Reversal ◽  
Doubly Spread Channels ◽  
Spread Channels

scholarly journals Optical-Theorem-Based Coherent Scatterer Detection in Complex Environments

2013 ◽  
Vol 2013 ◽  
pp. 1-12 ◽  
Author(s):  
Edwin A. Marengo ◽  
Fred K. Gruber
Keyword(s):  
Target Detection ◽  
Time Reversal ◽  
New Method ◽  
Urban Canyon ◽  
Scattering Data ◽  
Optical Theorem ◽  
Complex Environments ◽  
New Approach ◽  
Wave Data ◽  
Physical Energy

A new approach is proposed to detect scatterers embedded in reciprocal media from scattering data. The new method is rooted on physical considerations, in particular, on the optical theorem applicable to wavefields (e.g., acoustic, electromagnetic, and optical). The approach exploits insight gained from the optical theorem which assigns physical energy interpretations to the wave data from time reversal mirrors and cavities from which one can deduce the presence of unknown scatterers in unknown background media. The proposed approach is ideally suited for target detection in complex, highly reverberating unknown environments such as indoor facilities, caves, tunnels, and urban canyon.

Probe signals for obtaining impulse response of doubly‐spread channels

1997 ◽  
Vol 102 (5) ◽  
pp. 3118-3118
Author(s):  
Vincent K. McDonald ◽  
Richard C. Shockley ◽  
Joseph A. Rice ◽  
Dale Green
Keyword(s):  
Impulse Response ◽  
Doubly Spread Channels ◽  
Spread Channels

Receiver-transmitter optimization for detection in doubly spread channels

1991 ◽  
Vol 89 (4) ◽  
pp. 1714-1723 ◽  
Author(s):  
David Mark Drumheller ◽  
Dennis W. Ricker
Keyword(s):  
Doubly Spread Channels ◽  
Spread Channels

The O–C diagrams of minor planets − a new approach to modelling the rotation

1999 ◽  
Vol 173 ◽  
pp. 185-188
Author(s):  
Gy. Szabó ◽  
K. Sárneczky ◽  
L.L. Kiss
Keyword(s):  
Error Analysis ◽  
Time Dependence ◽  
Theoretical Work ◽  
Minor Planet ◽  
Minor Planets ◽  
New Approach ◽  
Preliminary Results ◽  
Ccd Observations

AbstractA widely used tool in studying quasi-monoperiodic processes is the O–C diagram. This paper deals with the application of this diagram in minor planet studies. The main difference between our approach and the classical O–C diagram is that we transform the epoch (=time) dependence into the geocentric longitude domain. We outline a rotation modelling using this modified O–C and illustrate the abilities with detailed error analysis. The primary assumption, that the monotonity and the shape of this diagram is (almost) independent of the geometry of the asteroids is discussed and tested. The monotonity enables an unambiguous distinction between the prograde and retrograde rotation, thus the four-fold (or in some cases the two-fold) ambiguities can be avoided. This turned out to be the main advantage of the O–C examination. As an extension to the theoretical work, we present some preliminary results on 1727 Mette based on new CCD observations.

Sign in / Sign up

Export Citation Format

Share Document