Default anyone knows whitch is the GPS chipset?

I was looking SGS disassembling pictures , but I have not been able to identify the chipset,
i I suppose it is broadcom or samsung , WIFi and BT are inside samsung SWB-B23 for sure ,
but i dont know if there are in a ingrated chipset like broadcom BCM20751 or in diferent chips ,
like BCM4750 GPS in the iphone.
Sorry my english
Thanks