Title :
A Modified Power Control Scheme in OFDMA Uplink
Author :
Li, Zhongnian ; Jiang, Zheng ; Wang, Yafeng ; Yang, Dacheng
Author_Institution :
Wireless Theor. & Technol. Lab. (WT&T), Beijing Univ. of Posts & Telecommun., Beijing
Abstract :
In OFDMA cellular system, the inter-cell interference is the dominating interference of the system, which greatly degrades the system performance, especially for the user at cell edge. The power control in uplink is an effective method to control the inter-cell interference. In this paper, we propose a modified uplink power control scheme utilizing the path loss difference between the serving cell and strongest neighbor cell without any additional signaling. The proposed power control scheme can provide a better tradeoff between average throughput and the cell edge throughput. Besides, it can make interference over thermal (IoT) more steady compared to the conventional fractional power control scheme. Simulation results show that the proposed power control scheme has 10% gain at a specific IoT operating point.
Keywords :
OFDM modulation; cellular radio; power control; radiofrequency interference; telecommunication control; OFDMA cellular system; OFDMA uplink; average throughput; cell edge throughput; intercell interference; interference over thermal; modified power control scheme; path loss difference; 3G mobile communication; Degradation; Fading; Interference; Multiaccess communication; OFDM; Power control; Scheduling; System performance; Throughput;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2008. WiCOM '08. 4th International Conference on
Conference_Location :
Dalian
Print_ISBN :
978-1-4244-2107-7
Electronic_ISBN :
978-1-4244-2108-4
DOI :
10.1109/WiCom.2008.189
