Andreas Mull

Assisting a global navigation satellite system using a local broadcast network

Supplementary information for global navigation satellite systems help to improve accuracy, may accelerate a first fix, and could enable localization even in difficult reception scenarios. Contemporary broadcast systems based on datacasting ease implementation of add-on services besides the actual video and audio services. This paper details on the aspects of such services designed for digital video broadcasting for handhelds (DVB-H) in a single frequency network to supplement a global positioning system receiver (GPS). Multiple approaches involving differential and assisted GPS as well as high and low level signalization in DVB-H are analyzed in this paper. From the corresponding results recommendations concerning the implementation of such services are derived.

The odds of running a nonlinear TV program using web technologies

Facing the problem of realizing a nonlinear TV program with all its requirements the usage of bare web technologies is proposed. Based on previous work a concept to enable nonlinear TV experience over any IP network is presented. Furthermore the chances of using unmodified web technologies and protocols for displaying and handling communication are highlighted. Special emphasis has been laid on being independent from a return channel, providing the possibility to use this framework for unidirectional broadcast systems (e.g. DVB-H). This paper focuses on such aspects as authoring, the database task for the abstraction layer, the push concept, playlist retrieval and channel switching.

Low power object based data reception for DVB-T2

Mobile devices - like smartphones - usually demand for ultra low power solutions to save battery life. This paper presents a novel approach to receive broadcasted data objects from a data carousel under these extreme low power conditions. The method is demonstrated for the DVB-T2 system using an integrated ultra low current wake-up receiver. The performed simulation suggests that an increased SNR of 0.3 dB is required to decode the modified DVB-T2 waveform. On the other side, this allows for continuous listening for carousel objects at the receiver side. During listening mode the wake-up receiver consumes 230 μA at 3 V for the simulated configuration.