Evolution of Ka-band on-the-move terminals for land and maritime broadband communications [International Communications Satellite Systems Conference]
0
Citation
0
Reference
10
Related Paper
Keywords:
Ka band
Communications satellite
Satellite broadcasting
This paper, the second and final of the two parts, discusses satellite communication at an introductory level. Various multiple accessing techniques are outlined. FDMA and TDMA techniques are treated in some detail. The paper concludes with brief descriptions of various factors influencing a satellite orbit and earth terminals for satellite communication.
Communications satellite
Cite
Citations (0)
Ka band
Communications satellite
Satellite broadcasting
Cite
Citations (0)
Ka-band satellite communication system has its advantages,e.g.an offer of a large bandwidth ( 3.5 GHz),a huge capacity of communications,a narrow beam,a reasonably small terminal size and a possible capacity for more satellites on the orbit plane,which makes it an inexorable trend in future satellite communications.The Ka-band satellite communication system is now confronted with a great challenge——it is easily affected by meteorological factors,which,for one time,aroused suspicion among researchers about its realization.Rainfalls,twinkles,as well as atmospheric absorption can all lead to the deterioration of Ka-band ground-to-air link channel quality.This paper gives the feature of Ka band satellite communication,analyses the feature of rain fade and presents several methods of anti rain fade.
Ka band
Communications satellite
Fade
Ku band
Cite
Citations (2)
Ka band
Communications satellite
Satellite broadcasting
Cite
Citations (0)
The Ka- and Broadband Communications Conference is an international forum attended by worldwide experts in the area of Ka-Band Propagation and satellite communications. Since its inception, NASA has taken the initiative of organizing and leading technical sections on RF Propagation and satellite communications, solidifying its worldwide leadership in the aforementioned areas. Consequently, participation in this conference through the contributions described below will maintain NASA leadership in Ka- and above RF Propagation as it relates to enhancing current and future satellite communication systems supporting space exploration.
Ka band
Communications satellite
Cite
Citations (0)
In satellite communication system, rain attenuation is one of the most important reasons for the signal fading transmitted at Ka band (30/20GHz). In this paper, based on the ITU recommendation rainfall attenuation prediction model, we obtain the rainfall attenuation value of one specific area in satellite communication systems at Ka band, in premise of knowing that rain attenuation value of a certain area follows lognormal distribution, then statistical distribution parameters are derived in detail by a method of the least squares curve fitting. After QPSK modulation, signal is polluted by additive noise in AWGN channel. We analyze and simulate the effect of light rain and heavy rain on signal propagation. The simulation results indicate that rain attenuation makes the signal-to-noise ratio and the bit error rate worse.
Ka band
Communications satellite
Satellite broadcasting
Ku band
Cite
Citations (8)
[Abstract] Long-term rain attenuation statistics and variability are discussed using Ka and Ku band satellite signal observations conducted at Osaka Electro-Communication University in Neyagawa, Japan, from 1986 to 2006. The 0.01% values of Ka and Ku band attenuation indicate fairly large yearly variations which amount to about 20% around the mean values. Besides the yearly rainfall rate statistics, these variations seem to be caused by difference in the equivalent path length in each year, which becomes longer as the average ground temperature at the rain time from May to October becomes higher. However, the increase of the equivalent path length is not fully explained by that of rain height, but rather related to the rain types which frequently appear in summer time with much larger cloud sizes. Also, the occurrence probability of heavy summer time precipitation such as typhoon and thunderstorm in Japan seems to be closely correlated with the tropical climate change caused by the sea surface temperature anomalies in the equatorial region.
Ka band
Communications satellite
Ku band
Satellite broadcasting
Cite
Citations (3)
Ka band
Transponder (aeronautics)
Communications satellite
Satellite broadcasting
Meteorological satellite
Cite
Citations (0)
Ka band
Communications satellite
Ku band
Extremely high frequency
Super high frequency
Cite
Citations (0)
It is so difficult to communicate between satellite terminals by the distributed weak signal along with the beam size in case that the satellite beam covers wide area or higher signal is needed. For overcoming this problem, one should make the size of terminal large, so should pay more for system construction. This paper looks around the configuration and functions of the multi-beam switching satellite communication system architecture, and introduces the utilization plans such as propagation test, verification test and practicality verification in Ka band OBS Satellite Communications System for COMS.
Ka band
Communications satellite
SIGNAL (programming language)
Cite
Citations (3)