Research on the Performance of Turbo Trellis Coded Modulation in Image Transmission over Flat Rayleigh Fading Channels
Bai Zhi-quan①; Yuan Dong-feng①②;Li Chang-chun①; Xu Wen-jin①
①School of Information Science and Engineering, Shandong University, Jinan 250100, China;②State Key Lab. on Mobile Communications, Southeast University, Nanjing 210096, China
Abstract：In this paper, based on the characteristics of Turbo codes and Trellis Coded Modulation (TCM), an improved method Turbo Trellis Coded Modulation (TTCM) is pre-sented and analyzed over flat Rayleigh fading channels in image transmission with two typical mapping strategies. The selection of different mapping strategies of TTCM in Rayleigh fad-ing channels for image transmission is analyzed and investigated. Furthermore, taking 8PSK modulation of TTCM as the example, two different mapping strategies are compared. Com-puter simulation results and PSNR that can evaluate the quality of the transmitted image are given.
2004, Vol. 26 
