基于单片机的FFT算法分析与实现

在电话自动转接装置中,为有效判断电话线路状态,常采用基于DSP等复杂器件判断线路信号,进一步判断线路状态;但嵌入式系统具有体积大、功耗高、成本高等缺点.装置通过单片机FFT运算,提取呼叫过程音信号,判断呼叫处理进程,并进行相应的操作处理.通过单片机FFT算法实现的电话线路状态判断与处理装置,能够准确识别话路呼叫信号音,为电话自动转接提供可靠线路状态信号.本设计在经济性、可靠性、低功耗、微型体积方面具有优势.

Realization and Analysis of FFT Algorithm Based on MCU

On the phone auto switching devices,in order to determine the status of telephone lines effectively,the complex DSP-based devices are used.But with large embedded systems,the higher cost and power consumption are shortcomings.The device extracts the line signal to determine call process through FFT computation based on the MCU and make the corresponding handling. Through the FFT algorithm to determine the status of the telephone lines,the device is able to accurately identify the call signal,then provide st...