在分析脉冲间隔调制(DPIM)的差错性能时,一般都假设时隙同步脉冲定时是理想的,忽略了定时误差的影响,然而这并不符合实际情况。在给出信道模型和解调模型的基础上,详细分析了定时误差对 DPIM差错性能的影响,并推导了附加热噪声 APD 接收机下的误符号率.仿真结果表明,要保证正确的解调,定时误差必须只占时隙时间的一小部分,否则系统的差错性能将严重劣化。 In analyzing the error performance of DPIM, it is generally assumed that the slot sync pulse timing is ideal, ignoring the impact of timing errors, however, this is not true. Based on the channel model and the demodulation model, the influence of timing error on the DPIM error performance is analyzed in detail, and the error symbol rate under the additional thermal noise APD receiver is deduced.The simulation results show that to ensure the correct demodulation , The timing error must only account for a fraction of the time slot, otherwise the system’s error performance will be seriously deteriorated.