【摘要】 通过把噪声展成KLSE级数的方法,得到了2DPSK光纤通信系统接收端噪声以及抽样判决变量的概率分布特性。在此基础上分析了2DPSK光纤通信系统的抗噪声特性。经过蒙特卡洛仿真验证可知,把KLSE方法用于2DPSK光纤通信系统是完全可行的。分析了2DPSK光纤通信和OOK光纤通信系统的抗噪性能,得出在同样误码率情况下2DPSK系统所需信噪比的值比OOK系统低3 dB的结论。更多还原

【Abstract】 A Karhunen-Loeve series expansion(KLSE) was employed to describe the optical noise,the distribution of the noise and the decision variables at the receiver of the 2DPSK optical fiber communication system were acquired.Then,the performance of bit error rate(BER) in 2DPSK system was analyzed.The simulation results show that the KLSE method is efficient and the 2DPSK system requires nearly 3 dB lower optical signal-to-noise ratio than OOK when the BER is the same.更多还原