Stochastic comb-pilot Design for NC-OFDM Based Cognitive Radio System
Xianzhong Xie, Xue-Tao Dong · Journal of Communication and Computer · 2008
NC-OFDM is a transmission mode of cognitive radio systems. The paper models and analyzes NC-OFDM stochastic process, then designs stochastic comb-pilot pattern and discusses its characteristics in detail. At the end of the paper simulation results show that channel estimation performance by Stochastic comb-pilots is better than those of conventional schemes, and prove feasibilities of the stochastic comb-pilot strategies in NC-OFDM system.