Abstract: A novel low-complexity scheme of Turbo Trellis-coded Modulation(TCM) iterative equalization and decoding is
presented, which serially concatenates a soft-input-soft-output(SISO) equalizer and symbol-by-symbol Turbo TCM(TTCM) decoder
through an iterative process in order to realize iterative equalization and decoding process. This scheme can not only
improve the bandwidth efficiency, but also reduce the intersymbol interference (ISI). The equalizer with maximum a
posteriori(MAP) is replaced with a linear one based on the minimum mean-square error(MMSE) at the receiver so that the
complexity of the system can be reduced greatly. Computer simulation results show that the novel low-complexity receiver on
the fading channel can achieve comparable performance with TTCM on the Gaussian channel with coding.

Key words: iterative equalization and decoding, Turbo equalization, low-complexity