研究了相位噪声对卫星通信链路传输性能的影响，给出了相位噪声的数字模拟方法，设计了卫星通信链路的基带等效仿真模型，结合8移相键控（8 Phase Shift Keying，8PSK）调制方式及低密度奇偶校验码（Low Density Parity Code，LDPC），仿真了相位噪声频谱特性对卫星通信链路传输性能所造成的恶化。仿真结果表明，当卫星通信链路的相位噪声特性变差时，会影响链路传输性能，甚至会出现误码平台。%With the effect of phase noise on transmission characteristics of the link of satellite communication researched,the numerical simulation means of phase noise is proposed,the base-band equivalent simulation model of satellite communication link is designed,and the effect of phase noise on transmission characteristics of the link of satellite communication is simulated with 8PSK modulation and LDPC error correction.The simulation results show that when the phase noise of the link of satellite communication is worse,the transmission characteristic is affected,and the error-floor is formed even.
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