By Gautham Nagesh - 02/01/12 07:02 PM EST
Walden's legislation is aimed at preventing the FCC from excluding particular firms from bidding in the auctions, which are designed to free up spectrum currently held by broadcasters for wireless use.
Hundt suggested the largest wireless firms could decide to purchase the airwaves just to kill off competition. Walden indicated the FCC could revoke some licenses if one firm buys too many.
Verizon Wireless and AT&T are the largest national wireless carriers, followed by Sprint and T-Mobile USA.