Blind linear equalization for GSM signals in a mobile environment
Ge Li, Zhi Jun Ding · 1999
We investigate the application of blind adaptive equalizers in GSM wireless communication systems. Based on a single-input two-output linear approximated model, a diversity based constant modulus algorithm (CMA) and super-exponential algorithm (SEA) adaptive equalizers are implemented to GSM systems without additional antennas. These diversity based CMA and SEA equalizers are robust to channel order mismatch that cannot be overcome by SOS blind channel algorithms. They are also applicable to time-variant mobile channels due to utilization of statistical information from the entire burst. The condition for the adaptive equalizers to converge is given. All simulation results are based on a more practical wireless channel model that is quasi-time-variant (piecewise time-invariant).