United States' third-largest wireless carrier Sprint Nextel Corp. along with its partners is planning to invest $1.5 billion more into Clearwire Corp.

The Wall Street Journal reported that Sprint Nextel, which has majority stake in the Clearewire, would invest $1 billion, while another$500 million will be contributed by Nextel's joint venture partners, viz. Comcast Corp., Intel Corp., Time Warner Cable Inc, and Bright House Networks.

The announcement of the investment, which would help the struggling wireless broadband services provider, could be made as soon as this week.

Wash.-based Clearwire, which has a workforce of around 2,100 people, had suffered a loss of $241.4 million during the the three months ended June 30.

Shares in Clearwire slipped about $6.50 in recent weeks.