How to interface NI USRP-2932 with FPGA

What you've asked doesn't make much sense... Here's why...

The USRP you've referenced already contains an FPGA... The Verilog source for that FPGA is available online, and the entire USRP design is in the public domain (I'm not certain of the license restrictions so I won't go so far as to say it's Open Source, but it is certainly available from Ettus Industries)

Depending on the model you actually have, there may or may not be a MICTOR connector available on the board that you could, in theory, use to interface to an external "FPGA" (combined, perhaps with a modified on-board FPGA config) It's not clear what you're trying to do...

Google is your friend...

I want to connect USRP 2932 with external FPGA. How to do it?
In one thesis i got that if i update the firmware of USRP then i can send data from it to external FPGA, and controlling of USRP is done through PC. I attached that document.

The document that you attached describes modifying the USRP FPGA, but solely to incorporate an IEEE 802.15.4 PHY (e.g. Zigbee)... The implementation described by the attached continues to use the GigE PHY native to the USRP... Please read the entire thesis, carefully... Your questions are both very open ended and tend to indicate that you don't have a solid handle on exactly what it is that you're trying to do... You seem to just want to "connect some things to some other things" solely for the sake of doing so... I assume this is for some kind of academic research project... Suggest you figure out what you want to actually do, in a signal processing context, before deciding on the hardware you with to do it with...