By simulating the modulation process using MATLAB, the influence of different power spectrum estimation algorithm to the bit-error-rate performance of the demodulation technique is analyzed.
通过Matlab仿真了调制解调过程，分析了三种功率谱估计算法对解调误码性能的影响。
Theoretical results of the lower bound of the bit error rate as well as the channel estimation error of the proposed algorithm were given.
从理论上分析了该算法所能达到的信道估计误差下限和比特误码率下限，并提出了最优叠加导频序列的设计准则。
The transmission quality of DWDM system is affected by the damages from linear and nonlinear effects so the ratio of optical signal to noise is reduced and the bit error rate is increased.
DWDM系统的传输质量受到线性和非线性两类效应引起的损害影响，导致光信号噪声比下降，误码率增大。
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