상세정보
학술지
Optimum Resource Allocation for Amplify-and-Forward Relay Networks With Differential Modulation
- 저자
- 조웅, Rui Cao, Liuqing Yang
- 발행일
- 200811
- 출처
- IEEE Transactions on Signal Processing, v.56 no.11, pp.5680-5691
- ISSN
- 1053-587X
- 출판사
- IEEE
- 협약과제
- 08MC2800, VMC 기술 개발, 오현서
- 초록
- The optimum resource allocation is an important method to improve the error performance and energy efficiency of wireless relay networks. In this paper, we consider the resource allocation as a two-dimensional optimization problem; that is, the energy optimization and the location optimization. Differential modulation which bypasses the channel estimation at the receiver is investigated using the amplify-and-forward protocol for a relay system with arbitrary number of relays. At high signal-to-noise ratio (SNR), we first derive the average symbol error rate for systems with and without a direct link. Then, the optimum resource allocation schemes which minimize the system error are developed. The comparisons based on analytical and simulated results confirm that the optimized systems provide considerable improvement over unoptimized ones, and that the minimum error can be achieved via the joint energy-location optimization. © 2008 IEEE.
- KSP 제안 키워드
- Amplify-and-Forward Relay, Amplify-and-forward protocol, Average Symbol Error Rate(ASER), Channel estimation(CE), Differential modulation, Energy Efficiency, Energy optimization, Error performance, High signal-to-noise ratio, Optimization problem, Signal noise ratio(SNR)