Basically, we like to use USB-5132 to continuously fetch the data from two channels digitizer input (I/Q signals),perform I^2 + Q^2 operation continuously in Labview, and then export the result in real-time to C/C++/Matlab data format on PC for more complicated signal processing algorithms. Is this possible? Thanks a lot for any feedback!!

Gators, Any device you can find in the PCI form factor that is capable of acquiring fast enough for your application will work for you. The hardware has nothing to do with your ability to process and display data on the fly. How you write your program to acquire and process the data will be the determining factor of if you will be able to keep up with the data coming in. I would recommend looking into Producer / Consumer Loops to process the data. The PCI-5102 will not be able to acquire fast enough for your application, I would recommend the PCI-5114 or the PCI-5112 for your application. I would also recommend getting plenty of on-board memory for the card you buy since you are going to be acquiring data at a fast rate for such a long duration.