The recent paradigm shift in the Internet’s usage, from the host-centric communication model to a model where users request information irrespectively of its location, is coupled with an increasing need for converged and seamless access over heterogeneous wired and wireless (fixed, cellular, and satellite) networks. Using a satellite network emulator within a publish/subscribe Information Centr...

It is well known that satellite communications systems are effective and essential communication infrastructure for disaster relief. NICT sent researchers to Tsunami stricken area in March right after the Great East Japan Earthquake and provided broadband satellite communications link to support rescue activities. Through this experience, we learned many kinds of requirements of communications ...

pertinent to the prospective atmospheric propagation effects Satellite Propagation in the 20to 30GHz Frequency Range, IEEE Trans. Ant. Prop. Ippo1ito, L. J., R. D. Kau1 , and R. G. Na11ace, Propagation Handbook for Sate11ite. Systems Design, A Summary of Propagation Impairments on 10 to 100 GHz Sate11ite. DESCANSO NASA Propagation Program. Propagation Effects Handbook for Satellite Systems Desi...

Satellite communication systems are the means of realizing a global broadband integrated services digital network. Due to the statistical nature of the integrated services traac, the resulting rate uctuations and burstiness render congestion control a complicated, yet indispensable function. The long propagation delay of the earth-satellite link further imposes severe demands and constraints on...

This paper addresses the signal acquisition problem in the presence of interferences using antenna arrays in the general framework of Global Navigation Satellite Systems receivers. We describe and compare two different approaches: the first one is based on the generalized likelihood ratio test (GLRT) detector directly applied on the array snapshots, and the second one uses a digital beamformer ...

Recalling the Palapa domestic satellite system, as a breakthrough technology for assessing isolated areas, and triggering business activities. INTELSAT commenced the opening of new horizons for reliable international satellite communication, and Indonesia took a wise decision to join, notwithstanding its economic hardships. Indonesia, had to take crucial decisions during ITU WARC-ORB ‘85 and ’8...