Iterative blind and non-blind channel estimation in GSM receivers

Channel estimation plays a leading role in wireless communication systems such as GSM (Global System for Mobile communications). Putting the main emphasis on investigating the application of non-blind and blind channel estimation approaches to the identification of a full rate data Traffic CHannel (TCH/F9.6), we present in this paper a new idea of an iterative channel estimation based upon the capabilities of channel coding. We will show that this method leads to a significantly improved performance especially for high speed propagations with Doppler frequencies up to 500 Hz. Giving the bit error rates (BERs) before and after channel decoding in terms of the Eb=N0 ratio, we show, furthermore, that blind channel estimation schemes could be as efficient as non-blind methods.