Toronto telecom equipment provider Nortel Networks is deepening its relationships with universities around the world to develop 4G wireless applications such as video and mobile TV. The company's investigations with the University of Waterloo, the University of Texas at Austin and National Taiwan University, among others, are designed to improve spectral efficiency and decrease time to market for 4G products, Nortel said in a press statement. Specifically at Waterloo, the company is working with the school's Coding and Signal Transmission group to increase wireless capacity.