Abstract: The DVB-SH (Digital Video Broadcasting – Satellite to Handheld) system is the latest of a series of specifications that enables broadcast quality video to be relayed directly from a broadcast network, and displayed on a handheld/portable/mobile device. In the case of the DVB-SH system, the broadcast network is made up of two components: The Satellite Component (SC) relays signals directly from the satellite to the User Equipment (UE), which may be fixed, portable or mobile. The Complementary Ground Component (CGC), on the other hand, is made up of a mesh of relay stations, which receive direct transmissions from the satellite system, and then “forward” the signals onto UE units within the coverage area of the particular CGC unit. Passive CGC units typically act as “relays” which perform only power boosting, while active CGC would also be involved in “Over-The-Air” (OTA) Error Correction and Local Content Insertion (LCI). This document outlines the techniques used and assumptions made to provide a rough estimate of the downlink budget of the Complementary Ground Component (CGC) portion of a DVB-SH system. The reader is assumed to have some understanding of the DVB-SH system as well as knowledge of satellite link budgets. |