Adaptive Radio Resource Management for OFDM-CDMA Systems

• Main Authors: Sheng-Fu Huang, 黃聖富
• Other Authors: Wern-Ho Sheen
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/jc6ftp

碩士 === 國立交通大學 === 電信工程系所 === 92 === The OFDM-CDMA benefiting from both OFDM (orthogonal frequency-division multiplexing) and CDMA (code-division multiple access) has merged as a powerful technology for next generation mobile multimedia networks. In this thesis, an air-interface architecture is proposed for next generation OFDM-CDMA forward link systems with flexible data rate provisioning and diversity usage and more importantly is MAI (multiple access interference) free. Based on the proposed air-interface architecture, potential radio resource management issues such as resource allocation, admission control, and packet scheduling are investigated, with emphasis on the adaptive radio resource allocation. The adaptations on modulation scheme, coding rate, spreading factor and number of sub-carriers are converged into data rate and power allocation in order to relate with quality of services (QoS). Meanwhile, a throughput-optimal radio resource allocation algorithm is proposed to maximize throughput and guarantee QoS for mobile multimedia OFDM-CDMA networks. With a proposed compression technique, we further explore the problem on reporting channel information in OFDM-CDMA systems.