接着，介绍了基于内插的MPSK信号符号同步的算法，以及各模块的硬件实现。

And then, the algorithm based on the interpolation of MPSK symbol synchronization, as well as the hardware implementation of the modules is introduced.

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相位统计矩方法利用MPSK信号符号初相位偶阶统计矩为M的单调递增函数的特性，并进行M进制识别复合假设检验。

In the SPM method the composite hypothesis test is performed by means of the monotonic characteristic of the even order statistical phase moments of MPSK signals.

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利用DS - SS信号符号间相位信息，提出了一种可工作于低信噪比下的直接序列扩谱(DS - SS)信号噪声抑制方法。

By exploring the phase information among symbols of the Direct Sequence Spread Spectrum (DS-SS) signal, a novel de-noising approach, used in low signal noise ratio environment, is presented.

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Other systems: the gestures that mimes use, semaphores, are all semiotic systems.

其他的系统，比如手势，模仿，信号，他们都是符号系统。

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