Maria Angeles Vázquez-Castro

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—In this paper, a statistical model for the land mobile satellite (LMS) channel is presented. The model is capable of describing both narrow-and wide-band conditions. Other relevant characteristic is that it can be used to study links with geostationary as well as nongeostationary satellites. The model is of the generative type, i.e., it is capable of(More)
—In this paper, a novel cross-layer framework for optimizing the dynamic bandwidth allocation (DBA) of a digital video broadcast (DVB)-return channel satellite (RCS) system using adaptive coding is proposed. The design of the medium access control (MAC) methods taking into account the adaptive physical layer and higher layers' quality of service (QoS)(More)
In this paper, we investigate two new candidate transmission schemes, non-orthogonal frequency reuse (NOFR) and beam- hopping (BH). They operate in different domains (frequency and time/space, respectively), and we want to know which domain shows overall best performance. We propose a novel formulation of the signal-to-interference plus noise ratio (SINR)(More)
— This paper focuses on the broadcast channel of an interactive Multibeam Broadband Satellite (MBS) system with a transparent architecture. In particular, a cross-layer design is proposed for the packet scheduling on a forward link that implements Adaptive Coding and Modulation (ACM). A cross-layer approach is considered whereby the physical and Medium(More)
Mobile access to the Internet is becoming extremely popular because users depend on the Internet for many activities in their daily routine. Satellites are well suited for mobile Internet applications because of their ability to enhance coverage and support long-range mobility. Satellites are an attractive alternative for mobile (pedestrian and, more(More)