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DVB-T/H Modulator - RF output with AD9789 DAC
The MVD DVB-T/H modulator is a drop-in module for FPGA that includes the following functions :
• Input data framer from Microprocessor, DVB-SPI source (MPEG-TS flow)
• DVB-T modulator◦Energy dispersal
◦ Reed Solomon encoder
◦ Convolutional interleaver
◦ FEC convolution encoder
◦ Inner interleaver
◦ QPSK/QAM symbol mapper
◦ Framer with pilots & TPS inserter
◦ IFFT and guard interval insertion
• Low pass filter
• Output for complex DAC (2 x 16 bits)
• Input data framer from Microprocessor, DVB-SPI source (MPEG-TS flow)
• DVB-T modulator◦Energy dispersal
◦ Reed Solomon encoder
◦ Convolutional interleaver
◦ FEC convolution encoder
◦ Inner interleaver
◦ QPSK/QAM symbol mapper
◦ Framer with pilots & TPS inserter
◦ IFFT and guard interval insertion
• Low pass filter
• Output for complex DAC (2 x 16 bits)
Features
- ETSI, DVB-T/H (EN 300 744 V1.5.1) compliant baseband transmitter for Digital Terrestrial Television
- • Supported FPGA families: Xilinx Spartan-6, Virtex-6, Artix-7, Kintex-7, Virtex-7, Zynq
- • Single clock
- • Robust SPI input (discarding of incorrect input packets)
- • PCR re-stamping
- • Single channel, supports hierarchical transmission
- • Configurable Convolutional Rate
- • Configurable in-depth interleaving for DVB-H
- • Programmable QPSK, 16-QAM and 64-QAM Symbol Mapping
- • Configurable support for 2k, 8k and 4k (DVB-H) OFDM modes
- • Programmable Guard Interval (1/4, 1/8, 1/16, 1/32)
- • Supports variable channel width 5 to 8 MHz
- • Base band output for complex DAC (2 x 16 bits)
- • Full synthesizable RTL VHDL design (not delivered) for easy customization
- • Design delivered as Netlist
- • MER > 40 dB
- • Carrier suppression > 45 dB
Deliverables
- - Datasheet
- - Netlist for core generation
- - VHDL top file
- - VHDL source code : can be delivered as an option under NDA and other specific clauses
Applications
- The MVD DVB-T/H modulator may be used in applications related to terrestrial transmission, typically at the head end.
Block Diagram of the DVB-T/H Modulator - RF output with AD9789 DAC
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