Comparison of Turbo Trellis Coded Modulation with Different Mapping Strategies in Image Transmission

초록

In this paper, based on the characteristics of Turbo Codes and Trellis Coded Modulation (TCM), a improved method Turbo Trellis Coded Modulation (TTCM) is presented and analyzed over AWGN (additive white gauss noise) channels in image transmission with two different mapping strategies. The selection of different mapping strategies of TTCM in AWGN channels for image transmission is analyzed and investigated. Furthermore, taking 8PSK modulation of Turbo TCM as the example, two different signal constellations are compared and computer simulation results are showed. Keyword: Turbo Codes, Turbo Trellis Coded Modulation, Ungerboeck Partitioning(UP), Block Partitioning(BP)