Earticle

초록

영어

Nonlinear distortion of power amplifier is one of the major factor that degrades the performance of OFDM systems .Instead of estimating the nonlinearity at transmitter such as ordinary pre-distortion (PD), this paper estimates the nonlinearity of amplifier at the receiver. The problem is that nonlinear and multipath dispersion mix together at receiver end. And their parameters are generally unknown, so conventional method doesn’t work well.
In this paper, an algorithm that estimates both the nonlinear parameters of the power amplifier and the impulse response of the wireless channel is proposed. Multi-level PN sequences are transmitted to construct a Vandermonde matrix, which separates the nonlinearity and linearity into different subspaces. The separation makes it easy to estimate the nonlinearity and linearity independently.

목차

Abstract
 1. Introduction
 2. Multi-level PN sequences for nonlinear channel estimation
  2.1. Linear channel estimation
  2.2. Nonlinear polynomial fit
 3. Simulation results
 4. Conclusion
 References

저자

• Nanqing Zhou, Hao Liu [ National Key Lab of Communication University of Electrical Science and Technology of China ]

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