由于使用了sigset函数(它向信号处理程序分配一个函数指针)，清单8比前一个示例稍微复杂一点，。

Listing 8 is slightly more complex than the previous example because of the sigset function, which assigns a function pointer to a signal handler.

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前向通道模块包括模拟通道和数字通道的设计以及数字信号的采样率变换。

The forward-direction channel module includes analog channel, digital channel and the conversion of the digital signal's sample-rate.

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采用前向差分预测能够较准确地预测出下一时刻的信号强度，提高了切换触发速度和切换判决精度。

And it is combined with the forward difference prediction for the signal strength of next time to improve the handoff accuracy.

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