FSK来电识别软解码算法研究

Research of Soft Decoding Algorithm For FSK CID

介绍电话POS STM32F103VC平台上FSK制式CID的软件解码实现。分析2DFT、移位相乘两种FSK软解调方法的原理,在MATLAB上对这两种解调方法的性能进行分析。MATLAB运算结果表明,2DFT方法和移位相乘方法各有优缺点。将解调算法按标准C代码移植至VC,再将其移植至电话POS STM32F103VC主控芯片,并在POS系统中对解码性能进行测试,优化解码算法。

This paper introduces the achievement of software decoding for FSK CID on the STM32F103VC of POS.At first,it analyzes the theory of the ＇2DFT＇ and ＇Shift-Multiplication＇ FSK soft demodulate method,and analyzes the function of the two methods on MATLAB.The results show that the two methods have their own advantages and disadvantages.We transplant the algorithm to VC by standard C code,and transplant the C code to the STM32F103VC of the telephone POS terminal.In the POS system,we have test the decoder＇s performance and tried to optimize it.