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Spatial Correlation and Diversity of Low-Latitude Multipath Multimode HF Skywave Radio Channels


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DOI: https://doi.org/10.15866/irecap.v9i2.16177

Abstract


To support the reliability and coverage of long-range skywave HF radio communication systems, it is necessary to consider technologies that involve multiple links, such as site diversity, network relay, or cooperative communication. This paper reports a study on the spatial correlation of signals between two HF skywave links with a common end and the benefit of site diversity systems using such links. For this study, two links in a low-latitude region are considered, each with a groundrange of 3044 km and 1895 km, both having a common transmitter and different receivers separated 1900 km apart. The correlation is evaluated from the results of ray-tracing simulations, verified with measurements and simulations for different dates. This study confirms that the correlation between two HF links is low, which can be explained as being the result of sum of multiple paths with random, uncorrelated phase-shifts. The study also proves that site diversity using two convergent links with selective combining can provide diversity gain and reduce the probability of outage significantly. To enhance the benefit of site diversity, a joint space-frequency diversity involving two different frequencies with opposite diurnal characteristics on the primary and alternative link is recommendable.
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Keywords


HF Radio Channel; Multihop; Long-Distance; Low-Latitude; Site-Diversity; Spatial Correlation

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References


C. Vilella, D. Miralles, J. L. Pijoan, An Antarctica-to-Spain HF ionospheric radio link : Sounding Results, Radio Science, Volume 43, RS4008.
https://doi.org/10.1029/2007rs003812

Isabona, J., Srivastava, V., Radio Channel Propagation Characterization and Link Reliability Estimation in Shadowed Suburban Macrocells, (2017) International Journal on Communications Antenna and Propagation (IRECAP), 7 (1), pp. 57-63. doi:https://doi.org/10.15866/irecap.v7i1.10343
https://doi.org/10.15866/irecap.v7i1.10343

Rajesh, R., Mallick, P., Thiruvengadam, S., Outage Performance of Optimal Relay Selection and Adaptive Antenna Configuration in Bidirectional Full-Duplex Amplify-and-Forward Relay Network, (2016) International Journal on Communications Antenna and Propagation (IRECAP), 6 (3), pp. 169-174.
https://doi.org/10.15866/irecap.v6i3.8112

Afolayan, B., Afullo, T., Alonge, A., Seasonal and Annual Analysis of Slant Path Attenuation Over a 12 GHz Earth-Satellite Link in Subtropical Africa, (2017) International Journal on Communications Antenna and Propagation (IRECAP), 7 (7), pp. 572-580.
https://doi.org/10.15866/irecap.v7i7.12668

G. Hendrantoro, Indrabayu, T. Suryani, A. Mauludiyanto, A Multivariate Autoregressive Model of Rain Attenuation on Multiple Short Radio Links, IEEE Antenna Wireless and Propagation Letters, March 06, 2006, Volume 5, Pages 54-57. https://doi.org/10.1109/LAWP.2006.870362
https://doi.org/10.1109/lawp.2006.870362

T. Rappaport, Wireless Communication (Prentice-Hall, 2002).

P. Baker, Spatial Correlation Measurements on One-Hop HF Radio Waves, IEEE Transactions on Antenna and Propagations, November 1971,Volume 19 (Issue 6), Pages 793 – 794.
https://doi.org/10.1109/tap.1971.1140047

M. Balser, W.B. Smith, Some Statistical Properties of Pulsed Oblique HF Ionospheric Transmission, Journal of Research of the National Bureau of Standard – D. Radio Propagation, Volume 66D, No. 6, November – December 1962, Pages 721 – 730.
https://doi.org/10.6028/jres.066d.072

A.J. Gibson, U.M. Yilmaz, Y. Tulunay, C.B. Erol, A. Ozguc, T. Ata, Characteristics of Fading of HF Signal and Noise, Intensities on Three Paths Between The United Kingdom and Turkey, Radio Science, Volume 30, Number 3, May – June 1995, Pages 649 – 658
https://doi.org/10.1029/94rs03174

L. McNamara, The Ionosphere : Communications, Surveillance, and Direction Finding (Krieger Publishing Company, 1991)

A. Vastberg, B. Lundborg, Superposition of Signals in Ionospheric Multipath Channels, Radio Science, Volume 32, Number 5, September – October 1997, Pages 2083 – 2090.
https://doi.org/10.1029/97rs00320

I. Kurniawati, G. Hendrantoro, Wirawan, M. Taufik, Statistical Modeling of Low-Latitude Long-Distance HF Ionospheric Multi-Mode Channels, Progress in Electromagnetics Research M, Volume 64, 23-33, 2018, Pages 77–86.
https://doi.org/10.2528/PIERM17101603

Solar Terestrial Dispatch, Proplab-Pro Version 3, 2010.

R. Mitran, M. Stanic, Delay Spread Evaluation of HF Channels based on Ray Tracing, IEEE International Black Sea Conf. On Communication and Networking (BlackSeaComm), pp. 1-5, Varna, 2016.
https://doi.org/10.1109/blackseacom.2016.7901553

R. Jones. And J. Stephenson, Versatile Three Dimensional Ray Tracing Computer Program For Radio Wave in The Ionosphere (US Gov. Printing Office, 1975).

Australian Government Beaureu of Meteorology, Monthly Sunspot Number. [Online].
Available : www.sws.bom.gov.au/Solar/1/6

E. Williams, Aviation Formulary V1.43 [Online].
Available: williams.best.vwh.net/avform.html, 2007

I. Kurniawati, P. H. Mukti, R. Corputty and G. Hendrantoro, Preliminary Study on HF Channel Complex Impulse Response and Power Delay profile characteristics in low latitude region, XXXI URSI General Assembly and Scientific Symposium, GP1.58, Beijing, China, August 16 – 23, 2014.
https://doi.org/10.1109/ursigass.2014.6929765

Low Noise Amplifier ZFL-500LN+.
https://www.minicircuits.com/pdfs/ZFL-500LN.pdf, accessed August 20, 2018


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