Research and Simulation on the Time Varying Enhancement Characteristics of
IPTRM for Multipath Signal
Abstract:
Time Varying Enhancement (TVE) is an important technology to deal with multipath fading often encountered in communication and measurement using electromagnetic wave, sound or laser. The self-focusing function of Time Reversal Mirror (TRM) makes it effective in blind TVE by realizing the thought of TVE automatically. Iterative Passive TRM (IPTRM) further strengths its TVE competence by using iterations. This study illustrated and analyzed the principle of TVE of IPTRM for the multipath signal in mathematics, presented the formulas of Gain Ratio and its times in 2nd IPTRM and also simulated and discussed the characteristics of IPTRM in both TVE and noise-removing. Based on the characteristics, study further pointed out the optimal selection of interesting part in IPTRM result and the method to select optimized original gain ratio, so that to get more remarkable TVE without any decreasing the SNR promotion. Contrasted to the present ways of TVE, IPTRM in this study is more simplified and practicable by realizing blind TVE and de-noising at the same time. It is much better that the TVE’s performance can be controlled by simply changing the original gain ratio in estimated channel.
How to cite this article
Di Fan, Aihua Lan, Huibin Liang and Maoyong Cao, 2013. Research and Simulation on the Time Varying Enhancement Characteristics of
IPTRM for Multipath Signal. Information Technology Journal, 12: 7312-7318.
REFERENCES
Fan, D., Y. Gao and Q.G. Cai, 2013. Design of ultrasonic processing circuits in borehole sediment thickness measurement. Applied Mech. Mater., 416: 549-553.
Direct Link
Fink, M., 1992. Time reversal of ultrasonic fields. I. Basic principles. IEEE Trans. Ultrasonics Ferroelectr. Frequency Control, 39: 555-566.
CrossRef
Gu, C.H., C.H. Tao, J.H. Zhang, J.P. Zhou, L.S. Zhou, H.X. Li and C. Liu, 2008. Design and realization of the real time gathering and display system echoviewer of super broad-band sea-bottom profile instrument. J. Jilin Univ. (Earth Sci. Edn.), 38: 495-501.
Kim, S., W.A. Kuperman, W.S. Hodgkiss, H.C. Song, G. Edelmann and T. Akal, 2004. Echo-to-reverberation enhancement using a time reversal mirror. J. Acoust. Soc. Am., 115: 1525-1531.
CrossRef
Kuperman, W.A., W.S. Hodgkiss, H.C. Song, T. Akal, C. Ferla and D.R. Jackson, 1998. Phase conjugation in the ocean: Experimental demonstration of an acoustic time-reversal mirror. J. Acoust. Soc. Am., 103: 25-40.
CrossRef
Ma, J.G., F. Li, Z.W. Shan, J.Y. Hui and X.L. Sheng, 2007. Broad band matched field processing technique basing on time-reversal. Tech. Acoust., 26: 606-610.
Direct Link
Pautet, L., A. Tesei, P. Guerrini and E. Pouliquen, 2005. Target echo enhancement using a single-element time reversal mirror. IEEE J. Oceanic Eng., 30: 912-920.
CrossRef
Thomas, J.L. and M. Fink, 1996. Ultrasonic beam focusing through tissue inhomogeneities with a time reversal mirror: Application to transskull therapy. IEEE Trans. Ultrasonics Ferroel. Frequency Control, 43: 1122-1129.
CrossRef
Yang, T.C., 2003. Temporal resolutions of time-reversal and passive-phase conjugation for underwater acoustic communications. IEEE J. Oceanic Eng., 28: 229-245.
CrossRef
Yin, J.W. and J.Y. Hui, 2008. Classified study on time reverse mirror in underwater acoustic communication. J. Syst. Simul., 20: 2449-2453.
Direct Link
Zou, Z.N., J.S. Tang and M.D. Wang, 2007. Data acquisition in interferometric synthetic aperture sonar system. J. Data Acquis. Process., 22: 501-506.
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