Earticle

초록

영어

In this paper we provide an adaptive modulation approach that uses adaptive pilot symbols which both pilot spacing and power allocation on pilot symbols are optimized in single input multiple output systems to maximize the spectral efficiency. The maximization is performed in the presence of imperfect channel state information at the transmitter. Also for reduce the computational complexity we propose a new method based on the curve fitting to find optimum power allocation on symbols. We provide closed forms expression for average spectral efficiency and average bit error rate over Rayleigh fading channel. Numerical results show the accuracy of our new method and demonstrate that our adaptive system outperforms other traditional systems that use of non-adaptive pilot symbols with single antenna based on spectral efficiency performance measure.

목차

Abstract
 1. Introduction
 2. System Model
 3. BER in the presence of channel prediction errors
 4. ASE and average BER and outage probability
  4.1. ASE computation
  4.2. Average BER computation
  4.2. Outage probability computation
 5. New method to find optimum power allocation α
 6. Numerical results
 7. Conclusion
 8. Appendix
 9. Acknowledgment
 10. References

키워드

저자

• Reza Barazideh [ Department of Electrical Engineering Shahed University, Tehran, Iran ]
• Babak Seyfe [ Department of Electrical Engineering Shahed University, Tehran, Iran ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  International Journal of Hybrid Information Technology

• 간기

  격월간

• pISSN

  1738-9968

• 수록기간

  2008~2016

• 십진분류

  KDC 505 DDC 605