DVB-T modulator
Product code: CMS0009
The proliferation of low-cost DVB-T / DVB-H demodulation and set-top-box products has opened up a wealth of opportunities for applications requiring low-cost broadband wireless audio/video/data links using DVB-T modulator technology. Commodity products have largely been aimed at the broadcast market where the high volumes are at the demodulation end of the link. The Commsonic DVB-T Modulator allows exploitation of this technology by allowing the development of the DVB-T modulator in low-cost FPGA or ASIC implementation. Applications include CCTV, wireless home networking, test equipment, etc.
This core is intended to provide a very efficient FPGA or ASIC implementation of all functions required to take the output from an MPEG-2 transport multiplexer and modulate it according to the DVB-T ETSI EN300 744 v1.5.1. The specification is fully supported by the DVB-T modulator for 2K, 4K and 8K COFDM modes as well as hierarchical transport streams. The standard output is a baseband I/Q digital pair for direct connection to a DAC. Alternative output configurations include a low IF or direct connection to standard Analog Devices Direct Digital Synthesizers (e.g. AD9857).
Every effort has been made to keep the size of the DVB-T modulator to an absolute minimum in order to target the low-cost FPGA families, however this has not been at the expense of functionality. Synthesis directives are used wherever possible to remove a block within the design has functionality that may not be required for all applications.
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Block diagram
Release note
Technical data brief, 
Altera megacore, 
