In order to improve the transmission performance of traditional least square(LS) and discrete Fourier transform(DFT) algorithm for broadband mobile satellite channel,an improved power judgement-based LS algorithm named PLS and a PLS with zero padding interpolation algorithm named PLS_ZP were proposed. Based on DFT estimation algorithm,PLS algorithm utilized the fading characteristics of broadband mobile satellite channel,got the power threshold by limiting the number of the effective taps and removed the noise outside the taps.PLS_ZP algorithm improved the original interpolation algorithm in frequency domain by means of the principle that zero padding of the time domain is equivalent to interpolation of the frequency domain, then utilized all the estimated pilot frequency information. Theoretical and experiment results showed that channel estimation mean square error(MSE) and bit error rate(BER) of the proposed algorithm are better than traditional algorithms,and the algorithm complexity is lower for hardware implementation.
