摘要
针对模拟光端机传输质量低、信号易受环境干扰而失真、系统性能不稳定和电路设计复杂等缺点,采用CPLD对四路数字光端机进行设计。考虑到四路采样频率在满足以上要求的同时,还要通过一路光纤传输四路采样数据的情况,提出了并串转换频率为采样频率四倍的策略,实现了分时复用光纤通道。通过实验和时序仿真,验证了该系统的正确性和可行性。该系统结构简单、成本低、性能稳定,是未来数字光端机行业发展的方向。
To overcome the disadvantages of analog optical terminal,e.g.,poor quality of transmission,signal distortion caused by environmental interference,unstable system performance,and complicate circuitry design,the quadruplet digital optical terminal has been designed by using complex programmable logic device（CPLD）.Considering the sampling frequency shall meet above requirements,and quadruplet sampling data shall be transmitted through the same optical fiber path,thus it is proposed that making the parallel to serial conversion frequency 4 times of the sampling frequency to implement time sharing and reusing optical fiber channel.Through experiments and timing simulation,the correctness and feasibility of the system are verified.The system also features simple structure,low cost,and stable in performance,definitely it will be the developing trend of digital optical terminals.
出处
《自动化仪表》
CAS
北大核心
2011年第1期80-82,共3页
Process Automation Instrumentation
作者简介
姜鹏，男，1980年生，现为南京工业大学模式识别与智能系统专业在读硕士研究生；主要从事图像处理、嵌入式系统方面的研究。
