Orthogonal Frequency Division Multiple Access (OFDMA) basestations allow multiple users to transmit simultaneously on different subcarriers during the same symbol period. This paper considers basestation allocation of subcarriers and power to each user to maximize the sum of user data rates, subject to constraints on total power, bit error rate, and proportionality among user data rates. Previous allocation methods have been iterative nonlinear methods suitable for offline optimization. In the special high subchannel SNR case, an iterative root-finding method has linear-time complexity in the number of users and N logN complexity in the number of subchannels. This paper proposes a non-iterative method that is made possible by the relaxation of strict user rate proportionality constraints.
Did you find this white paper useful?
25 out of 50 users found this white paper useful
Related white papers
WLAN (IEEE 802.11B) and WMAN (802.16A) Broadband Wireless Access: When Opportunities Drive Solutions
The Institute of Electrical and Electronics Engineer (IEEE) approved in 1997 the Standard 802.11, followed by Standard 802.11b in 1999. Although the standards were intended for indoor wireless local area...
WiFi Protected Access (WPA) Overview
This paper provides information about the WiFi Protected Access (WPA) update for the Microsoft Windows XP family of operating systems. It provides guidelines for IHVs and driver developers to understand...
Wireless Internet Using 2.4 GHz
Wireless Internet is currently available almost everywhere using digital cell phone and PCS technologies. However, these capabilities are of no use to a local ISP who may consider using them...
Powerline Communications Technology - Residential Versus Commercial
The Telkonet PlugPlus system is a robust system for commercial applications, scalable to hundreds of users. It is intended for large installations, such as hotels and apartment complexes, that demand...
Capacity, Coverage, and Deployment Considerations for IEEE 802.11g
802.11g is an exciting new technology that offers additional performance, while providing investment protection for 802.11b clients through backward compatibility. By using previous technologies and economies of scale, 802.11g devices...
Exploring Wireless Technologies
Providing an overview of the key technologies and applications of wireless networking, this white paper provides a step-by-step description of how wireless local area networks (WLANs) work. The keystone to...
Wireless LANs vs. Wireless WANs
This paper discusses the differences between wireless LAN and wireless WAN, and the two technologies are explained in detail, including: coverage, speeds, security, costs and the different uses of each....
