This paper takes a broad view on the history and the present status of satellite communications and broadcasting. The necessary starting point of this overview is the visionary papers produced by Sir Arthur C. Clarke and John Pierce. This was the real dawn of the satellite communication era. This paper attempts to explain the “fil rouge” of the evolution of satellite technologies across six dec...

This paper discusses the evolution of communication satellite systems and communications satellite technology from the 1960’s to the 1990’s. The paper identifies the key attributes of satellite communications that has driven this evolution and now drives the future directions such systems will take. The paper then discusses the future direction of communication satellite systems including DBS, ...

In this paper multiple antenna channel codes, i.e. Space-Time Block Code, Space-Time Trellis Code and SuperOrthogonal Space-Time Trellis Code, are examined in a satellite communication, comparing the gain that the multiple antenna channel coding techniques provide to the communication system. The satellite channel for urban area, modeled as a combination of Rayleigh and log-normal processes wit...

The satellite communication data traffic is increasing dramatically over the coming years. High throughput multibeam satellite networks in Ka band are potentially able to accommodate the upcoming high data rate demands. However, there is only 500 MHz of exclusive band for download and the same amount for upload. This spectrum shortage impose a barrier in order to satisfy the increasing demands....

Optical wireless communication has undeniably revolutionized the satellite communication systems for use in the coming future. These OWC systems have become popular due to their high data rate performance in different weather conditions. This paper demonstrates a comparative analysis of RZ (Return to zero), NRZ (Non-return to zero) and Gaussian pulse generation methods by varying the levels of ...

This paper presents the handover management in mobile satellite communications with multimedia traffic. Multimedia traffic is becoming the next hop in mobile satellite communication, due to its demand. The coverage of the satellite network knows no boundary and with the concept of the broadband satellite network, communication for multimedia and high-data rate multimedia communications can be p...

due to the positive and negative impacts and implications of new technologies (internet and satellite), as a new phenomenon in human society this study examines the role of new communication technologies, especially in a family torn apart by divorce phenomenon (legally and emotionally) in iranian families and especially this city has done. a survey of all families living in this city, which in ...