一种FSK反正切差分解调方法

Arctan Differentiated Demodulator Method of FSK

针对频移键控在通信系统应用中其调制解调技术在一定程度上直接影响通信系统的性能,提出了一种FSK数字解调方法,称作反正切差分解调。该方法基于正交反正切算法,正交信号直接相除消除了幅度调制成分。新的方法适用于窄带和宽带的FSK信号并适合于数字接收机。仿真结果表明,该技术能有效解调FSK信号,并适合于多种制式的FSK信号。

The demodulation technology of FSK signal can directly impact on the perfornmnce of communication system in a certain degree. In this paper, a FSK digital demodulator is proposed,called arctan differentiated demodulator. The demodulator is based on quadrature arctan algorithm. Direct division of quadrahu＇e signals rejects amplitude modulation components. The proposed demodulator works for both narrow ＆ wide band FSK signals,and it is suitable for digital receivers. The sinmlation resuhs show that the technology can better demodulate FSK signal, and it is suitable tor many formats of FSK signal.