I worked with Paradox for a number of years. Synchronizing, as most DB folks use the term, is not supported. I know of no link for handhelds. The fact that Paradox is now deprecated (no longer supported by Corel) has caused me to move on.
I haven't done this myself, but I do remember someone in the Paradox newsgroups on news://pnews.thedbcommunity.com posting something about sync'ing data down from a Palm using HanDBase and loading this in/out of Paradox.
Maybe if you search these newsgroups, you may get the help/guidance you need.