The National High Speed Rail Corporation (NHSRC) is likely to float 20-30 global tenders for the bullet train project between Ahmedabad and Mumbai from January onwards, sources close to the development told CNBC-TV18.

"We will be floating some 20-30 tenders for civil and electricity work, signalling, station building, coaches and this will happen from January. These will be awarded by June," the source said requesting anonymity.

Prime Minister Narendra Modi's ambitious project, which has recently received funding of over Rs 5,500 crore from Japan International Cooperation Agency is, however, facing some issues with regard to land acquisition across Gujarat and Maharashtra.

While the land acquisition exercise is running smoothly in the areas of Surat and Vadodara and one of the five petitions against land acquisition in Gujarat High Court was withdrawn last week, the agency is struggling to acquire land in other districts of Gujarat and large parts of Maharashtra.

"We are facing problems in acquiring land across Palghar, Navsari, Thane," the source said.

The project's Bandra Kurla station may also need some redesigning due to the increase in height of the International Finance Corporation's building, which is being built above the station area.

The project is estimated to cost Rs 1.1 lakh crore. Japan International Cooperation Agency has agreed to fund 81 percent of the total project cost, amounting to around Rs 88,000 crore, through a 50-year loan at an interest rate of 0.1 percent with a moratorium on repayments up to 15 years and the remaining cost will be borne by the state governments of Maharashtra and Gujarat.

Of the 508.17-km long corridor, 155.76 km will be in Maharashtra, 348.04 km in Gujarat and 4.3 km in Dadra and Nagar Haveli.

While the designs for six stations of the high-speed rail corridor has already been finalised, design of Thane, Virar, Boisar, Anand, Bharuch, Sabarmati stations is expected to be released in another 15 days, the source added.