TEHRAN  - Iran on Tuesday denounced as "an antagonistic move" a tightening of US sanctions targeting Tehran's central bank and giving US banks new powers to freeze Iranian government assets, and said it would have no impact.In further defiance of world pressure on Iran to curb its nuclear program, parliamentarians said they would speed up passage of a bill to ban Iranian oil exports to the European Union well before an EU decision to bar Iranian crude would take effect.The US sanctions step, in an executive order signed by President Barack Obama, was the latest measure against the Central Bank of Iran and was meant to close loopholes in existing sanctions Tehran has faced.Iran's Foreign Ministry spokesman said such measures were doomed to fail. "It's psychological warfare which has no impact... There is nothing new, it has been going on for over 30 years," Foreign Ministry spokesman Ramin Mehmanparast said, referring to three decades of US-Iranian hostility.Tension with the West rose last month when Washington and the EU took direct aim at the ability of OPEC's No. 2 oil exporter to sell crude to force Tehran to rein in its nuclear work, which the West suspects is meant to yield atom bombs.Iran said after the EU approved an oil embargo against Iran on January 23 that it would fight such sanctions with its own sanctions. However, a parliamentary debate set for January 30 on a proposed halt to crude sales to the EU was postponed.But Obama's move provoked Iranian parliamentarians, who said on Tuesday the assembly was ready to speed up passage of a bill to oblige the government to ban oil exports to some EU states - turning the tables on the EU which is to phase in its embargo on Iranian oil by July.