Is AD9957 capable of generating 8PSK & OFDM carrieres? If so, is there any reference design or data available? Thanks.
The AD9957 has an 18-bit digital baseband data port. The data port allows you to feed a quadrature (I&Q) baseband signal (digital) into the AD9957. Virtually any quadrature modulation scheme you can envision can be accomplished via the digital baseband input. However, you must provide the digital baseband data from some external source like an FPGA or microprocessor. The sample rate of the baseband data is determined by the amount of interpolation you program into the AD9957.
The carrier frequency is set separately by programming a frequency tuning word into the DDS portion of the AD9957.
Thanks for the timely and thorough response; is there any reference design or data avaialble?
I am not aware of a reference design. Hopefully there is at least one forum member who has done similar work and would be willing to help you out.
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