"We should be able to give recommendation on this (auction of spectrum) before April 15," Sarma told reporters in New Delhi.
The recommendations are expected to give guidance on key issues, including base price of spectrum, amount of spectrum that should be allocated to a bidder and eligible participants.
On the Unified Licensing regime, the Trai chairman said recommendations for it should be submitted by next week.
"I think by next week, we should be giving out recommendations for Unified Licence," Sarma said.
In the recommendations, Trai is expected to give out detailed guidelines on unified licences that will be issued to all telecom companies in future and will be delinked from spectrum.
Trai, in its draft guidelines on unified licences, has proposed a fee of Rs 20 crore (Rs 200 million) for a national-level unified licence
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