Sprint Nextel Corp
Sprint's joint venture partners on Clearwire, a group which includes Comcast Corp
The paper said that an announcement of the new investment could come as soon as this week.
Sprint's CEO Dan Hesse said a recent during earnings call that the company would be supportive of funding Clearwire.
Sprint Nextel, Clearwire, Comcast, Bright House, Intel, Time Warner and Google were not immediately available for comment.
(Reporting by Megan Davies and Sinead Carew)