TY - GEN
T1 - Pilot allocation for doubly selective channel estimation in OFDM systems
AU - Zhang, Xin
AU - Zhang, Xiujun
AU - Xiao, Limin
AU - Zhang, Yan
AU - Zhou, Shidong
AU - Wang, Jing
PY - 2013
Y1 - 2013
N2 - This paper investigates deterministic pilot allocation for compressed sensing (CS) based channel estimation of doubly selective channel in Orthogonal Frequency Division Multiplexing (OFDM) systems. Based on minimizing the coherence of submatrix of two-dimensional Discrete Fourier Transform (2D-DFT) matrix, the optimum pilot location criterion for greedy reconstruction methods is derived. However, it is difficult to find such optimum pilot location set. A greedy method is proposed to search a suboptimal pilot allocation solution. What's more, considering the special structure of doubly selective channel, an improved reconstruction method based on Orthogonal Matching Pursuit (OMP) is proposed. Simulation results demonstrate a significant improvement of channel estimation performance by using the proposed pilot allocation and the improved reconstruction method.
AB - This paper investigates deterministic pilot allocation for compressed sensing (CS) based channel estimation of doubly selective channel in Orthogonal Frequency Division Multiplexing (OFDM) systems. Based on minimizing the coherence of submatrix of two-dimensional Discrete Fourier Transform (2D-DFT) matrix, the optimum pilot location criterion for greedy reconstruction methods is derived. However, it is difficult to find such optimum pilot location set. A greedy method is proposed to search a suboptimal pilot allocation solution. What's more, considering the special structure of doubly selective channel, an improved reconstruction method based on Orthogonal Matching Pursuit (OMP) is proposed. Simulation results demonstrate a significant improvement of channel estimation performance by using the proposed pilot allocation and the improved reconstruction method.
UR - https://www.scopus.com/pages/publications/84893278601
U2 - 10.1109/WOCC.2013.6676359
DO - 10.1109/WOCC.2013.6676359
M3 - Conference contribution
AN - SCOPUS:84893278601
SN - 9781467356992
T3 - Proceedings - 2013 Wireless and Optical Communications Conference, WOCC 2013
SP - 151
EP - 155
BT - Proceedings - 2013 Wireless and Optical Communications Conference, WOCC 2013
T2 - 22nd Wireless and Optical Communications Conference, WOCC 2013
Y2 - 16 May 2013 through 18 May 2013
ER -