The new contract with Iran for delivery of the S-300 air defense missile systems will be signed early next year, a spokesman for the Russian delegation at the Dubai Airshow 2015 international aerospace show said.

"Talks with the Iranian side on forming the image of the S-300 air defense missile system are continuing and will be completed not earlier than early next year," the spokesman said.

He said the Almaz-Antey concern, which will be the head performer of the contract, is capable of ensuring production and delivery of S-300s to Iran 18 months after the signing of the contract.

There is no official information yet which modification of S-300 Iran plans to obtain: S-300PMU-1, which has been discontinued but may be specially produced for the Iranian side, or S-300VM.

Earlier this week, Igor Nasenkov, the First Deputy General Director of the Concern Radio-Electronic Technologies (KRET), said Russia is considering the delivery of ground-based electronic warfare (EW) systems for defense to Iran.

"We are ready to consider a possibility of ground-based EW complexes delivery to Iran if necessary and should the political situation allow," Nasenkov told RIA Novosti at the Dubai Airshow-2015.

KRET, one of Russia's largest holding companies, was founded in 2009. The company is part of the Rostec state technologies corporation, uniting over 95 radio-electronic industrial companies.

The manufacturer has developed several EW systems, including the radar complex Moskva-1, onboard defense system President-S for civil and military aircraft, and the Rtut-BM system to alert troops and equipment to incoming artillery fire.