In this paper, a direct/cooperative relay switched single carrier-frequency division multiple access (SC-FDMA) using amplify-andforward (AF) protocol and spectrum division/adaptive subcarrier allocation (SDASA) is proposed. Using SDASA, the transmit SC signal spectrum is divided into sub-blocks, to each of which a different set of subcarriers (resource block) is adaptively allocated according t...

Artificial satellites were first deployed in the late 1950s. They have since brought about enormous progress in telecommunications. All communication satellites in their simplest form are concerned mainly with information communication from a source (transmitter) on the ground to a sink (receiver) that is at a geographically dispersed location through a satellite in space (acting as a retransmi...