The demands of shifting to the operating frequency wireless telecommunication systems at new higher bands increase as day by necessity transfer more data volume through networks. Bangladesh has launched its first satel-lite, Bangabandhu-1, with 40 communication channels in C and Ku bands. Besides, a huge terrestrial microwave backbone networks suffer from fading during rain across country. expe...

In this paper satellite wave propagation at Ku and Ka band is considered. The design and simulation of a typical satellite beacon receiver at Ka band is designed and simulated for the future works. Also rain attenuation prediction at Ku band using satellite signal beacon measurement and simulations for Iran Telecommunication Research Center (ITRC) are presented. The measurement setup consists o...

Presented in this paper is an empirical model for long-term rain attenuation prediction and statistical prediction of site diversity gain on a slant path. Rain attenuation prediction on a slant path is derived using data collected from tropical regions, and the formula proposed is based on Gaussian distribution. The proposed rain attenuation model shows a considerable reduction in prediction er...

Multiparameter radar measurements were made during a heavy rainfall event accompanied by hail in Colorado. Rainfall rates R and accumulation for this event were estimated using S-band specific differential phase KDP, reflectivity factor ZH, and X-band specific attenuation AH3. These estimates were compared with measurements from a ground-based rain gauge. Both R–KDP and R–AH3 relations were in ...

Satellite remote sensing of rain is important for quantifying the hydrological cycle, atmospheric energy budget, and cloud and precipitation processes; however, radar retrievals of rain rate are sensitive to assumptions about the raindrop size distribution. The upcoming EarthCARE satellite will feature a 94 GHz Doppler radar alongside lidar and radiometer instruments, presenting opportunities f...

This paper proposes an analytical model for evaluating the performance of dense wavelength division multiplexing (DWDM) for all optical orthogonal frequency division multiplexing (AO-OFDM) optical wireless channel. The investigated performance for proposed system is evaluated for the parameters  bit error rate (BER) and Q factor .The constellation diagrams, and bit error rate (BER) of the recei...

For sites located in different climatic regions, we estimated the relationship between annual average probability distributionof exceeding a fixed rain attenuation, and carrier frequency range 16 to 100 GHz, zenith paths of GeoSurf satellite constellations. In these constellations attenuation is independent altitude number satellites. Rain iss calculated with Synthetic Storm Technique, reliable...

Wireless communication in the millimetre frequency bands is subject to severe atmospheric impairment caused by rain and scintillation, which may occasionally cause deep fades and thus needs to be mitigated by an efficient countermeasure such as adaptive coding and modulation (ACM). In this paper we focus on stratospheric communication and propose appropriate rain and scintillation fading channe...

The use of more and more high frequency bands is presently one of the major trends in the satellite communications field. Several important advantages can be achieved by increasing frequency against a sensible impact with atmospheric effects, in particular with the heavy fading induced by rain precipitations. In the last few years, several methods based on adaptive techniques to counteract the ...