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| 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 |
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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.
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Received: 17 January 2003
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2004, Vol. 26 
