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The current main digital broadcasting networks and standards include Digital Video Broadcasting Terrestrial (DVB-T), Handheld (DVB-H) and Digital Audio Broadcasting (DAB). DVB-T and DAB are key broadcast network technologies which are expected to complement other emerging technologies such as WiMAX and its derivatives in future 4G networks. Newer defined standards such as DVB-T2 and Next Generation Handheld DVB-NGH are also being developed and tested promising higher data rates and mobility support to allow new and improved services. The physical layer of all these technologies rely on Orthogonal Frequency Division Multiplexing (OFDM), which is a technique that distributes data over a large number of carriers spaced apart at precise frequencies providing frequency diversity. This special issue discusses the main optimisation techniques for the design and deployment of current and future Digital Broadcast networks that will minimise the complexity and power consumption of end user equipment and enhance the delivery of new broadband services. These techniques include the optimisation of current standards such as DVB-T and DVB-H, the use of On-channel Repeaters (OCR) to extend coverage and the development of new standards such as DVB-T2 and DVB-NGH. The main current network optimisation techniques include transmit diversity, low cost on-channel repeaters, multiple channel power amplification, receive diversity, efficient network modelling and planning tools and the definition of service scenarios that describe the future use of broadband services in terms of service type and reception conditions.