基于APPM的TCM码在无线光通信系统中的误码性能

BER Performance of Analysis of TCM Code based on APPM for Optical Wireless Communication System

将网格编码调制(TCM)引入到光脉冲幅度位置调制(APPM)中,通过分析及对2×4-TCMAPPM,4PPM和2×8-TCMAPPM,8PPM分别进行MATLAB仿真,得到:在保持带宽不变的前提下,2×4-TCMAPPM与4PPM信息速率相同,但前者误码性能优于后者,且最大达到14.7 dB;2×8-TCMAPPM的信息速率与8PPM相同,但前者误码性能优于后者,且最大可达到11.7 dB.通过仿真证明,TCM确实能有效地改善系统的误码性能.

Trellis Coded Modulation（TCM）is introduced into APPM in optical wireless communication system to find its improvement of the BER performance of optical wireless communication system. Through analysis and MATLAB simulation of 2 × 4-TCMAPPM, 4PPM and 2 × 8-TCMAPPM, 8PPM, the result is that holding bandwidth constant, the BER of performance of 2 × 4-TCMAPPM is up to 14.7 dB times better than 4PPM as their information speed is the same, and the BER of performance of 2 × 8-TCMAPPM is up to 11.7 dB times better than 8PPM while their information speed is the same. Conclusion is acquired that TCM improves the error performance of that system effectively.