Propagation of very short pulses at millimeter wavelengths through rain filled medium

Maitra, Animesh; Dan, Marina; Sen, A. K.; Bhattacharyya, K.; Sarkar, Chandan Kumar

doi:10.1007/bf02209276

Cited by 12 publications

(6 citation statements)

References 4 publications

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“…In this example, a pulse with initial duration of r in = 0.2 ns is shown to be shortened ð r out r in < 1Þ at frequencies where a 00 < 0, satisfies conditions for compression resulting from Eq. (17).…”

Section: Numerical Results -Propagation At 60 Ghzmentioning

confidence: 95%

“…2 were calculated with the millimeter propagation model (MPM), developed by Liebe [7][8][9][10]. Several theoretical papers dealt with the problem of distortion occurring when a short pulse is propagating in absorptive and dispersive media, including gases and plasmas [11][12][13][14][15][16][17]. In this paper, we develop a general space-frequency approach for studying wireless transmission of ultra-short pulses in millimeter wavelengths through the atmospheric media [25].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Spectral characteristics of gaseous media and their effects on propagation of ultra-wideband radiation in the millimeter wavelengths

Pinhasi

Yahalom

2005

Journal of Non-Crystalline Solids

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Section: Numerical Results -Propagation At 60 Ghzmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Spectral characteristics of gaseous media and their effects on propagation of ultra-wideband radiation in the millimeter wavelengths

Pinhasi

Yahalom

2005

Journal of Non-Crystalline Solids

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“…Furthermore, Gibbins [4] and Pinhasi et al [5] have modeled ultra short Gaussian pulse propagation through the atmosphere assuming clear sky conditions. On the other hand Maitra et al [6,7] have studied the problem of rain contribution to the propagation of very short pulses and have suggested a methodology for integrating clear sky and precipitation effects. Frequency-dependent refractive index is considered to resolve into two summands, one corresponding to clear sky atmosphere and the other to rain-filled medium.…”

Section: Introductionmentioning

confidence: 98%

Millimeter Wave Pulse Propagation through Distorted Raindrops for LOs Fixed Wireless Access Channels

Georgiadou¹,

Panagopoulos²,

Kanellopoulos³

2006

Journal of Electromagnetic Waves and Applications

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Millimeter waves propagating through the atmosphere experience absorption and dispersion due to various physical mechanisms. Gaseous oxygen, water vapor and suspended water droplets represent the principal absorbers in moist air, while in the presence of rain additional phenomena of absorption and scattering further degrade the transmitted signal. The scope of this paper is the incorporation of rainfall rate effects on pulse propagation along LineOf-Sight (LOS) Fixed Wireless Access (FWA) paths. A regression fitting analysis in combination with the Method of Auxiliary Sources (MAS) is implemented for the calculation of the scattering amplitude of a plane electromagnetic wave by a Pruppacher-Pitter raindrop. As a result, analytical expressions of rain-influenced propagation factors are derived. Numerical results for horizontally and vertically polarized channels are presented and some important conclusions are derived.

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“…Many researchers are doing research on outdoor UWB channel characterizations at multipath effects and its path loss only [1][2][3][4]. In addition, there is a lack of adequate research [3,[5][6][7] on the effects of atmospheric layers at 1-13 GHz, especially in the tropical areas. Therefore, the study of tropical outdoor UWB channel characterization is very relevant to do for preparing UWB-based 5G applications in the near future.…”

Section: Introductionmentioning

confidence: 99%

The Rainfall Intensity Effects on 1–13 GHz UWB-Based 5G System for Outdoor Applications

Suryana

2017

Wireless Communications and Mobile Computing

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This paper reports a research contribution on tropical outdoor channel characterization in 1-13 GHz band for 5G systems. This 1-13 GHz ultra-wideband (UWB) channel characterization is formulated with rain intensity as the most important variable, from 20 mm/h to 200 mm/h. Tropical rain will cause pulse broadening and distorts the transmitted symbols, so the probability of symbol errors will increase. In this research, the bit error rate (BER) performance evaluation is done using both matched filtering or correlator-based receivers. At no rain conditions, BER 10 −6 will be attained at signal to noise ratio (SNR) 5 dB, but at rainfall intensity 200 mm/h, the BER will fall to 10 −2 for matched filter and 5 × 10 −2 for correlator-based receivers. For improving the BER performance, an adaptive nonlinear phase equalizer is proposed which adopts multiple allpass biquad infinite impulse response (IIR) filters combined with low-order finite impulse response (FIR) filter to mitigate the nonlinearity phase and differential attenuation of magnitude responses due to antenna and tropical outdoor UWB channel effects. Our simulation results show that the proposed equalizer has worked successfully with BER 10 −6 on the rain rate that is exceeded for 0.01% of the time ( 0.01 ) rain intensity or 99.99% availability. In addition, at rainfall rate 120 mm/h, the proposed nonlinear phase equalizer can give 9 dB signal improvement.

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Propagation of very short pulses at millimeter wavelengths through rain filled medium

Cited by 12 publications

References 4 publications

Spectral characteristics of gaseous media and their effects on propagation of ultra-wideband radiation in the millimeter wavelengths

Spectral characteristics of gaseous media and their effects on propagation of ultra-wideband radiation in the millimeter wavelengths

Millimeter Wave Pulse Propagation through Distorted Raindrops for LOs Fixed Wireless Access Channels

The Rainfall Intensity Effects on 1–13 GHz UWB-Based 5G System for Outdoor Applications

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