Characterization of Rain Specific Attenuation and Frequency Scaling Method for Satellite Communication in South Korea

Shrestha, Sujan; Choi, Dong-You

doi:10.1155/2017/8694748

Cited by 32 publications

(21 citation statements)

References 22 publications

(25 reference statements)

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“…The propagation measurements over an earth space path have been carried out at Korea Radio Promotion Association building, Mokdong-13 na-gil, Yangcheong-gu, Seoul, Republic of Korea (37 • 32'45.25"N, 126 • 52'58.8"E) by National Radio Research Agency, RRA by receiving a Ku and Ka bands beacon signals of the Koreasat 6 satellite at 12.25 and 20.73 GHz, respectively, using 1.8 m antenna whose specification is detailed [29]. Similarly, another beacon receiver is installed at same place to measure the Ka band beacon at 19.8 GHz from COMS 1 using a similar sized antenna whose specifications are depicted in Table 2.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…The Particle Size and Velocity (PARSIVEL) disdrometer is a laser based instrument designed to count and measure simultaneously the size and fall speed of precipitation particles. The descriptions of the experimental [18,29,30]. The limitations of Parsivel disdrometer are the limited sampling, the possibility to have multiple drops passing through the sampling area at same instance of time and the axis ratio considered for drop equivolumetric diameter retrieval.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…Most of the existing rain attenuation prediction models use regression coefficients k and α to estimate the rain attenuation. The further theoretical backgrounds are highlighted in [29] along with a brief overview of the Simple Attenuation Model (SAM). SAM model studies the relationship among specific attenuation and rain rate, statistics of the point rainfall intensity and spatial distribution of rainfall on earth-space communication links operating in the range of 10 to 35 GHz.…”

Section: Literature Reviewmentioning

confidence: 99%

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Diurnal and Monthly Variations of Rain Rate and Rain Attenuation on Ka-Band Satellite Communication in South Korea

Shrestha¹,

Choi²

2018

PIER B

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Statistics of monthly and diurnal variations in the occurrence of rain fades are needed to give a detailed insight for system design of these services. This paper analyses the performance on three years of rain rate and rain attenuation measurement to study the empirical determination of power law coefficients calculated for monthly distribution of rain attenuation from the knowledge of rain rate at 19.8 GHz link for COMS1 in South Korea. The received signal data for rain attenuation and rain rate were collected at 10 second intervals over a three year period from 2013 to 2015. The comparison of measured data for monthly variation illustrates the suitability for the estimation of signal in Kaband whose appropriateness is verified through the comparison with prominent rain attenuation models namely ITU-R P. 618-12 and empirically generated regression coefficients values for ITU-R P. 838-3. A monthly variation of the coefficients has been indicated, and the empirical measured data were compared with the ITU-R P. 838-3 derived regression coefficients. Moreover, the statistics analyzed to 6 hour contiguous periods of the day are also shown. Furthermore, the paper presents an overview of the predicted monthly variation of rain attenuation estimation of 2013 year for Ka band in 19.8 and 20.73 GHz from 12.25 GHz link which are obtained from the ITU-R P. 618-13 frequency scaling method, and these predictions are compared with experimentally measured values. These statistics can be useful for communication systems whose service quality and design require seasonal and diurnal variation.

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Section: Experimental Methodsmentioning

confidence: 99%

Section: Experimental Methodsmentioning

confidence: 99%

Section: Literature Reviewmentioning

confidence: 99%

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Diurnal and Monthly Variations of Rain Rate and Rain Attenuation on Ka-Band Satellite Communication in South Korea

Shrestha¹,

Choi²

2018

PIER B

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“…The comparative analyses of 1-minute rain rate measurement are further performed in [16]. Similarly, the studies of specific rain attenuation are analyzed for Ku and Ka band in [17][18][19]. Additionally, the differential equation approach is analyzed in [20] and the cumulative distributions of rain attenuation obtained from Praha, similar to climatic regions as of South Korea, are compared with the calculated ones in accordance with relevant ITU-R recommendation [21].…”

Section: Introductionmentioning

confidence: 99%

Rain Attenuation Study over an 18 GHz Terrestrial Microwave Link in South Korea

Shrestha

Choi

2019

International Journal of Antennas and Propagation

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Absorption of microwave radio frequency signal by atmospheric rain and losses is prevalent at frequencies above 5 GHz. The functioning frequencies of 18 GHz are taken for the point-to-point microwave link system. This paper presents studies on rain attenuation at 18 GHz, which specifies minimum performance parameters for terrestrial fixed service digital radio communication equipment. It presents a 3.2 km experimental link at 18 GHz between Khumdang (Korea Telecom, KT station) and Icheon (National Radio Research Agency, RRA station). The received signal data for rain attenuation and the rain rate were collected at 10-second intervals over three year’s periods from 2013 to 2015. During the observation period, rain rates of about 50 mm/hr and attenuation values of 33.38 dB and 21.88 dB occurred for 0.01% of the time for horizontal and vertical polarization. This paper highlights the discussion and comparison of ITU-R P.530-16, Moupfouma, Silva Mello, and Abdulrahman models and proposed an attenuation prediction approach where it presents the relationship between theoretical specific rain attenuation as specified by ITU-R P.838-3, γ%p, and effective specific rain attenuation, γeff. Additionally, it studies 1-minute rain rates derived from higher time integration of 5-minute, 10-minute, 20-minute, 30-minute, and 60-minute instances which are obtained from experimental 1-minute rainfall amounts that are maintained by the Korea Meteorological Administration (KMA). The effectiveness of the proposed approach is further analyzed for 38 and 75 GHz links which shows better prediction capability. Particularly, in an 18 GHz link under horizontal polarization, ITU-R P. 530-16 shows the relative error margin of 71%, 60%, and 38% where as 64%, 49%, and 42% were obtained under vertical polarization for 0.1%, 0.01%, and 0.001% of the time, respectively. The limitation of research lies on the experimental system that is set up in only one location; however, the preliminary results indicate the application of a suitable 1-minute rain attenuation model for a specific site. The method provides useful information for microwave engineers and researchers in making decisions over the choice of the most suitable rain attenuation prediction for terrestrial links operating in the South Korea region, particularly for lower frequency ranges.

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“…Rain rate data was measured through OTT Parsivel, which shows the rain rate of about 50 mm/h and attenuation of 10.7, 11.6, and 11.3 dB for 12. 25, 19.8, and 20.73 GHz, respectively, for 0.01% of the time for the combined values of rain rate and rain attenuation statistics [10,11]. The design of millimeter wave communication links and the study of propagation impairments signal.…”

Section: Introductionmentioning

confidence: 99%

Data-Aided and Non-Data-Aided SNR Estimators for CPM Signals in Ka-Band Satellite Communications

2017

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Adaptive coded and modulation (ACM) is an effective measure to resist rain attenuation in Ka-band satellite communications. The accuracy of the estimator for signal-to-noise ratio (SNR) is one of the main factors that affect ACM performance. This paper establishes the channel model of satellite communication in Ka-band and derives and analyzes data-aided (DA) maximum likelihood (ML) and method-of-moments estimators for SNR of continuous phase modulation (CPM) in Ka-band fading channel. Simulations and analysis indicate that the normalized mean square error (NMSE) of the DA ML estimator is closer to the Cramer-Rao bounds (CRB) at low SNR, but the performance worsens with the SNR increases from medium to high values. The M 2 M 4 estimator performs poorly at low SNR and best at medium SNR. When the SNR is low, the performance of the DA ML estimator is better than the M 2 M 4 estimator; however, the two estimators have similar performance when SNR is high. The performances of the two estimators will become increasingly better the greater the lengths of the observation signals become. However, the influence of the signal length will become increasingly smaller as the SNR becomes larger.

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Characterization of Rain Specific Attenuation and Frequency Scaling Method for Satellite Communication in South Korea

Cited by 32 publications

References 22 publications

Diurnal and Monthly Variations of Rain Rate and Rain Attenuation on Ka-Band Satellite Communication in South Korea

Diurnal and Monthly Variations of Rain Rate and Rain Attenuation on Ka-Band Satellite Communication in South Korea

Rain Attenuation Study over an 18 GHz Terrestrial Microwave Link in South Korea

Data-Aided and Non-Data-Aided SNR Estimators for CPM Signals in Ka-Band Satellite Communications

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