Wideband DDC

The Wideband Digital Down Converter (DDC) digitally converts the input signal at IF frequency down to baseband by multiplying input samples with sine/cosine waves generated by numerical controlled oscillators (NCO). Down converted samples are then decimated by a factor ranging from 2 to 2048 with multiplying step of 2. A CIC and 4 stages of half band filters are integrated within the decimator.

The core accepts a real signal at input and provides complex I/Q baseband data at the output. The parallel architecture of the core allows for an input throughput up to 2.4 Gsps, data symbol rate up to 540 Msymb/s, making it a perfect fit for ultra high throughput applications such as wideband DVB-S2X communication.

• High throughput wideband digital down converter
• Up to 600 MHz signal bandwidth
• Tunable IF frequency
• Integrated decimator and filters

• Contains Numerical Controlled Oscillators, IF mixers, decimator, and halfband filters.
• High input throughput of up to 2.4 Gsps.
• Supported signal bandwidth of up to 600 MHz.
• Tunable IF frequency from 10 to 700 MHz with a precision of at least 2 Hz.
• Spurious-free dynamic range (SFDR) of at least 83 dB, filter’s passband ripple less than 0.05 dB.
• Low-power and low-complexity design.
• Configurable decimation rate.
• Accepts real input signal or complex I/Q upon request.
• Memory mapped interface for configuring and retrieving status information.
• Available for ASIC and FPGAs (Xilinx, Intel).

• Wideband satellite communication
• Wideband wireless backhaul
• Wideband cable modems
• Electronic surveillance applications

• VHDL source code or synthesized netlist
• VHDL testbench
• HDL simulation models
• Bit-accurate Matlab, C or C++
• simulation model
• Comprehensive documentation