Television broadcast using Unequal Fountain Codes

A fundamental problem in wireless networks is to develop an effective communication protocols that achieve high throughput by using user´s diversity. In broadcast system. Thus, users with better channel performance has to wait others to receive all information, and results in a waste of the wireless resources. To cope with this problem, we propose a novel fountain code called Unequal Fountain code (UFC) in this paper. At the broadcast station, extra information is added to the basic message according to the ratio and the duplicate coefficient with UFC proposed in this paper, users with better channel performance can decode part of the extra information than others. We then investigate how the ratio and the duplicate coefficient influence the performance of UFC by both theoretical analysis and simulation. Simulation results show that UFC is optimal in the broadcasting system.