Improved blind channel estimation algorithm using virtual carriers
Fang Ye · Jisuanji gongcheng yu sheji · 2010
To get faster speed of convergence,and achieve better accuracy and better use of transmission bandwidth in OFDM system,an improved subspace blind channel estimation algorithm is presented.Different from the proposed blind channel estimation methods using order cumulat information or receiver diversity,it is virtual carriers based,and two SVD decompositions are directly used at the receiver.It is directly applied to CP-OFDM and ZP-OFDM systems.Comparision of the proposed algorithm with other subspace channel estimation methods by computer simulation illustrates effectiveness of the proposed algorithm with regard to both estimation accuracy and speed of convergence under the same conditions.