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Best Choice for SDR platform?

Arthur Adams
Prodigy 20 points
Other Parts Discussed in Thread: DAC3482, DAC3482EVM, TSW3085EVM

I'm working on SDR project that needs 8 MSPS I/Q (16-bit samples) signal generation in real-time (on the fly).

For generation 8 MSPS I/Q 16bit samples, 8x16x2 = 256 Mbps or 32MBps (Mega Byte per second) bus needed, so I think this will rule out USB interface.

What is the best (price+time) choice for designing a SDR platform with this specifications ?

I think about designing a PCI-Express card with a DAC34xx and a FPGA on it !

Is there any EVM that support on the fly signal generation with driver API?

  • 0
    TI__Guru 66104 points

    Arthur,

    For evaluation of the DAC348x family, you can refer to the DAC348xEVMs or the TSW308xEVMs. The links below are for the DAC3482EVM and the TSW3085EVM to evaluate the DAC3482, dual I/Q DAC with up to 625MSPS of input data rate. With interpolation features, the DAC can achieve up to 1.25GSPS of DAC output rate. The DAC family also include quad DACs and/or up to 1.5GSPS of DAC output rate. All the DAC EVMs have DAC output with transformer coupled. The TSW EVMs have DAC + I/Q modulator with the option for RF pre-amp enabled.

    http://www.ti.com/tool/dac3482evm

    http://www.ti.com/tool/tsw3085evm

    Both EVM interfaces with our TSW1400/TSW1406 pattern generators. The pattern generator software, High Speed Data Converter Pro, has example Labview vi files for loading signal pattern into the TSW140x boards. The Labview vi utilizes .dll files, which you can use to interface with other programming languages such as C or Matlab.

    You can download the HSDC Pro software on the TI TSW1400EVM web folder:

    http://www.ti.com/tool/tsw1400evm

    Once you have installed the software, you can find the automation files in the example folders listed below:

    C:\Program Files (x86)\Texas Instruments\High Speed Data Converter Pro\Automation Function APIs

    C:\Program Files (x86)\Texas Instruments\High Speed Data Converter Pro\1400 Details\Example VI\DAC

    TSW1400_software_API.doc

    The TSW1400 uses the FTDI USB chip to load data into the FPGA from your PC. Due to the USB bus limitation, you may not be able to load real time data. You may have to load a chunk of test data with pre-defined frames, and line up your test/measurement equipment with these frames.

    -KH

  • 0 in reply to Kang Hsia
    Prodigy 20 points

     Are TSW1400/TSW1406 pattern generators support on the fly signal generation with buffering signal? I mean I need to generate signal continuously without interrupt for more than 2 or 3 hours, but the is no problem if there was a constant delay for buffering!