Canadian alternative asset manager Brookfield Asset Management Inc. is vying with American Tower Corp. for the wireless towers of two operators in India, which could fetch a combined 100 billion rupees ($1.5 billion), people with knowledge of the matter said.Idea Cellular Ltd. and Vodafone Group Plc are in talks with the two North American companies about a sale of their telecommunications infrastructure, according to the people, who asked not to be identified because the information is private. Vodafone and Idea, which agreed this week to merge their Indian operations, are running separate sale processes, though the assets may be sold to a single buyer for better returns, the people said.