A decision feedback channel estimation approach of the satellite mobile communication system

In this paper we present a decision feedback channel estimation way for the mobile satellite communication system in order to improve the bit error performance. The transmission is disturbed not only by shadowing and multipath effects and additive white Gaussian noise, but also by the weather attenuation. The conventional Least Square(LS) is not well suited to detect the transmitter sequence, whereas the LS-based decision feedback is able to take into account the fading channel and therefore is able to detect the signal much better. The LS-based decision feedback channel algorithm first estimate channel response, then the estimation channel response use decision feedback estimation to get the next frame channel response. Our simulation results show that LS-based decision feedback channel estimation algorithm performs much better than the origin LS channel estimation method in terms of bit error rate(BER) with a gain of probably 1 dB.