伪随机码绝对式编码器采用M序列伪随机码作为编码方法，采用双狭缝技术进行分时位置读取，并采用ROM元件进行译码输出。
M sequence pseudorandom code is used for encoding the pseudorandom code absolute encoder, double slit technique is used to perform time sharing reading and ROM is used as the coding device.
分析了伪随机码的相关特性，讨论了基于伪码相关技术的超声波液位测量原理，设计并完成了液位测量系统。
The relative characteristics of the pseudo code are analyzed. With discussion on the principle ol ultrasonic level measurement based on pseudo code technology, the level measuring system is designed.
被高速伪随机码调制的扩频信号，其伪随机码是具有随机编码信号特征的周期信号。
The spread spectrum (SS) signal is modulated by high-rate pseudo noise code, and belongs to typically periodic signal.
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