【摘要】 针对航空光纤总线传输系统设计中接收机三种状态识别难这一关键问题,首次引入了双脉宽曼彻斯特编码调制机制,经过误码率与灵敏度估算,仿真结果表明,双脉宽曼彻斯特调制机制接收机比SAE-A2K光纤工作组推荐的光调制机制的灵敏度高。FPGA仿真设计实现表明,该调制机制具有实现难度低,而且能有效解决接收机三种状态识别的问题。更多还原

【Abstract】 One optical modulation scheme is introduced to optical fiber avionics buses, named Two-Ary Pulse Width Manchester Bi-Phase coding (TAMBC). We focus on the analysis of error probability and optical receiver sensitivity for AS1773 data buses with TAMBC modulation scheme and other modulation schemes proposed by SAE-A2K Optical Fiber Group. The results show that TAMBC modulation scheme has better receiver sensitivity than others. The new modulation scheme is simulated by FPGA software, the result shows that it can be used to efficiently solve the problems associated with the fast identification of correct operation states for optical transmitters while maintaining less complexity of transcivers.更多还原