Future wireless networks will be driven by various ubiquitous broadband services such as portable telephony, mobile Internet, Voice over IP, and IPTV. To accommodate a single cells large number of users, each running a different application on its mobile terminal, optimization of limited resources is critical. The transmission path from the base station to the mobile terminal is the downlink. In the downlink, feedback of mobile users condition to the base-station is essential for optimal allocation of limited resources, however, it is a system design challenge. Mobile users...