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对多功能调制芯片Stel－1109的功能、原理及内部结构做了较详细的介绍，并给出了在高速正交调制中的应用实例。在该系统中，应用Stel-1109的QPSK调制方式，实现了高速正交扩频编码和调制。
The function, principle and internal structure of multi-function modulation chip Stel-1109 are introduced in detail, and the application examples in high speed orthogonal modulation are given. In this system, the QPSK modulation method of Stel-1109 is used to realize high-speed orthogonal spreading coding and modulation.