PPBSP circular correlation based channel estimation for CP-OFDM systems

A perfect punctured binary sequence pairs (PPBSP) circular correlation based channel estimation algorithm for orthogonal frequency division multiplexing (OFDM) is proposed. The original sequence of PPBSP with cyclic prefix (CP) is inserted between OFDM symbols as training sequence. The cross-correlation is calculated between the received sequence with CP removed and the punctured sequence of PPBSP. Channel impulse response (CIR) is decided with good autocorrelation property of PPBSP. Both theoretical analysis and simulation result show that, compared with the traditional method, an impressive performance with less system overhead and lower computation burden is obtained with the proposed method.