开关键控 meaning in English
keying, on-off (ook)
on-off keying
onoff keyingg
Examples
- ( c ) propose the scheme to implementing the coder and deoder of optical time - spreading / frequency - hopping , by assigning two orthogonal codes for one user and using these two codes to encoding 1 and 0 respectively , differential detection can be adopted . not only improves system performances in ber , but also resists the interference such as mai , and does n ' t need any control devices to evaluate the optimum decisive threshold
通过给每个用户指定互相关为0的两个地址码分别发送1和0信号以及在接收端采用差分检测技术，避免了ook (开关键控)光通信系统中0不发送光脉冲和ook常规检测方式下最佳判决门限必须根椐用户数等外界环境而改变，从而提高了系统性能和降低了系统的复杂度。