A Study of Power Control Methods for the Proposed 5G Cellular System

• Main Authors: Tang, Zhi-Wen, 湯志文
• Other Authors: Huang, Chia-Chi
• Format: Others
• Language: en_US
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/92959715730899600763

碩士 === 國立交通大學 === 電信工程研究所 === 104 === In the proposed 5G cellular system [1], all users use the same frequency band to transmit data; like CDMA systems, any excessive transmit power will increase the overall interference. Without power control mechanisms, better link quality and system capacity cannot be achieved in the proposed 5G cellular system. We adopt open-loop power control in uplink transmission for combating near-far problem so that equal signal power from the mobiles can be received by the same BS. The performance of uplink power control is evaluated by power control error. Power control in downlink transmission is used to increase system capacity. We make a simplified analysis and simulation to evaluate the capacity of a downlink system with ideal SIR balancing. Besides, the downlink capacity with a practical closed-loop power control method is verified by computer simulation in this thesis.