Power Optimization for Multiuser MISO-OFDMA Based Cognitive Radio Systems

被引：0
|
作者：
Nguyen Tien Hoa [1 ]
Nguyen Thanh Hieu [2 ]
Nguyen Van Duc [1 ]
Truong Vu Bang Giang [3 ]
机构：
[1] Hanoi Univ Sci & Technol, Hanoi, Vietnam
[2] Sch Elect & Elect Engn, Singapore, Singapore
[3] VNU Univ Engn & Technol, Hanoi, Vietnam
来源：
2013 INTERNATIONAL CONFERENCE ON ADVANCED TECHNOLOGIES FOR COMMUNICATIONS (ATC) | 2013年
关键词：
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This paper proposes analysis power optimization for MISO-OFDMA down-link based cognitive radio system that maximizes the sum rate of multi secondary users (SU). The problem is solved based on dual optimization method under constraints on the tolerable interference thresholds between secondary users and primary user's (PU) frequency bands and the total transmission power. In proposed system, multiple transmit antennas cooperatively design their respective transmit beam-forming vectors (MISO) to optimize the system performance. Accordingly, this MISO technique has been applied to OFDMA Cognitive system to compensate for the impact of from PU to CR. The simulation results are presented showing how CR coordinator determine the position and power which are assigned to each CR subcarrier to maximize the transmission throughput and the suggested MIMO system has more more enhanced and efficient total throughput then previous SISO system.
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页码：7 / 11
页数：5
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