How to enable WiFi extenders in MBRN3000?

Hi, 

For the past few days, i am facing problem in setting up the Wifi extender using my existing - 3G Mobile Broadband wireless N Router MBRN3000. I got a 4G datacard connection, which has the wifi hotspot capability. Using 4G hotspot with my router, I need to extend the Wifi coverage to my home. I know, wireless repeating function exist in this model but facing problem in setting up the same. Please suggest.