TIIS (한국인터넷정보학회)
Current Result Document :
| 한글제목(Korean Title) |
Second Order Suboptimal Power Allocation for MIMO-OFDM Based Cognitive Radio Systems |
| 영문제목(English Title) |
Second Order Suboptimal Power Allocation for MIMO-OFDM Based Cognitive Radio Systems |
| 저자(Author) |
Tien Hoa Nguyen
Thanh Hieu Nguyen
Van Duc Nguyen
Duyen Trung Ha
Guilllaume Gelle
Hyunseung Choo
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| 원문수록처(Citation) |
VOL 08 NO. 08 PP. 2647 ~ 2662 (2014. 08) |
한글내용
(Korean Abstract) |
|
영문내용
(English Abstract) |
This paper proposes an efficient and low complexity power-loading algorithm for MIMO-OFDM downlink based cognitive radio system that maximizes the sum rate of single secondary user (SU) under constraints on the tolerable interference thresholds between secondary user and primary user’s frequency bands and the total transmission power. Our suboptimal algorithm is based on the 2nd order interference tracking and nulling mechanism to allocate transmission power of the subcarriers among SU’s scheme. The performance of our proposed suboptimal scheme is compared with the performance of the classical power loading algorithms, e.g., water filling, 1st order interference tracking, nulling, and other suboptimal schemes. Numerical results show that our algorithm has low complexity but obtains a higher channel capacity than that of some previous suboptimal algorithms in some scenarios. We dedicate also that for a given interference threshold, the 2nd order interference tracking mechanism has dynamic number of nulling position instead fixed number of nulling position |
| 키워드(Keyword) |
Cognitive Radio
MIMO
OFDM
Power Allocation Optimization
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| 파일첨부 |
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