HYBRID TIME-DIVISIONAL MULTIPLEXED MODULATION

1 . A method for generating a hybrid signal comprising:

broadcasting digital video in a first set of at least one time slot of a plurality of time slots comprising the hybrid signal;

broadcasting data, formatted for reception at a mobile device, in a second set of at least one time slot of the plurality of time slots comprising the hybrid signal; and

broadcasting structured data in a transition band between the first set of at least one time slot and the second set of at least one time slot.

2 . The method of claim 1 , wherein the structured data is selected to improve a quality metric of the hybrid signal.

3 . The method of claim 2 , wherein the structured data comprises a waveform selected to allow a smooth transition between a first waveform representing the digital video and a second waveform representing the data formatted for reception at a mobile device.

4 . The method of claim 3 , wherein the selected waveform is a cross-fade between the first waveform and the second waveform.

5 . The method of claim 2 , wherein the structured data comprises band-limited noise having an amplitude limit selected to prevent output power fluctuation.

6 . The method of claim 2 , wherein the structured data comprises a signal modulated with only a repeated binary value. s 7 . The method of claim 2 , wherein the structured data comprises a signal carrying data from a data source other than the digital video and the data formatted for reception at a mobile device.

8 . The method of claim 1 , wherein broadcasting digital video comprises broadcasting digital video compliant with the DVB-T2 standard and broadcasting data formatted for reception at a mobile device comprising broadcasting data compliant with a long term evolution (LTE) standard.

9 . The method of claim 8 , wherein broadcasting digital video compliant with the DVB-T2 standard comprises broadcasting the digital video in a T2 frame and broadcasting data compliant with a long term evolution (LTE) standard comprises broadcasting the LTE data in a future extension frame, and broadcasting structured data in the transition band comprises broadcasting the structured data in a sync buffer time associated with the future extension frame.

10 . The method of claim 9 , wherein the sync buffer time associated with the future extension frame includes a first sync buffer time, located near a beginning of the future extension frame, and a second sync buffer time, located near an end of the future extension frame, and broadcasting the structured data in a sync buffer time associated with the future extension frame comprising broadcasting the structured data in the first and second sync buffer times.

11 . The method of claim 1 , further comprising:

broadcasting digital video in a third set of at least one time slot of a plurality of time slots comprising the hybrid signal; and

broadcasting structured data in a transition band between the second set of at least one time slot and the third set of at least one time slot.

12 . A hybrid modulator system comprising:

a digital video source configured to provide digital video according to a desired video standard;

a mobile data source configured to provide data formatted for reception at a mobile device;

a structured data source configured to provide structured data; and

a multiplexer configured to combine the digital video, the data formatted for reception at the mobile device, and the structured data as a hybrid signal in a time-multiplexed arrangement, such that the digital video occupies a first set of at least one time slot of a plurality of time slots comprising the hybrid signal; the data formatted for reception at the mobile device occupies a second set of at least one time slot of the plurality of time slots comprising the hybrid signal, and the structured data occupies a transition band between the first set of at least one time slot and the second set of at least one time slot.

13 . The hybrid modulator system of claim 12 , wherein the structured data comprises a waveform selected to allow a smooth transition between a first waveform representing the digital video and a second waveform representing the data formatted for reception at a mobile device.

14 . The hybrid modulator system of claim 12 , wherein the structured data comprises band-limited noise having an amplitude limit selected to prevent output power fluctuation.

15 . The hybrid modulator system of claim 12 , wherein the structured data comprises a signal modulated with only a repeated binary value.

16 . The hybrid modulator system of claim 12 , wherein the structured data comprises a signal carrying data other than the digital video and the data formatted for reception at a mobile device.

17 . A hybrid modulator system comprising:

a digital video source configured to provide digital video formatted according to the Digital Video Broadcasting (DVB) standard;

a mobile data source configured to provide mobile data formatted according to the Long Term Evolution (LTE) standard;

a structured data source configured to provide structured data; and

a multiplexer configured to insert the mobile data into a future extension frame associated with the DVB standard and to insert the structured data in a sync buffer time associated with the future extension frame.

18 . The hybrid modulator system of claim 17 , wherein the multiplexer is configured to provide the sync buffer time associated with the future extension frame as a first sync buffer time, located near a beginning of the future extension frame and a second sync buffer time, located near an end of the future extension frame, and insert the structured data into each of the first and second sync buffer times.

19 . The hybrid modulator system of claim 17 , wherein the structured data is selected to improve a quality metric of the hybrid signal.

20 . The hybrid modulator system of claim 17 , comprises a signal carrying data other than the digital video and the mobile data.