基于FPGA的2FSK调制信号的解调  

Demodulation of 2FSK Modulation Signal Based on FPGA

作　　者：孟敬[1] MENG Jing(Tianjin Deviser instruments Incorporated,Tianjin 300392,China)

机构地区：[1]天津市德力电子仪器有限公司,天津300392

出　　处：《中国有线电视》2018年第11期1273-1275,共3页China Digital Cable TV

摘　　要：FPGA技术在电子通信和信号处理领域得到了广泛的应用,并已成为通信仪器和设备实现的首选方案。FSK是数字通信中使用较早的一种调制方式,它用不同频率的载波来传递信号,用数字基带信号来控制载波信号的频率。最常见的是用两个频率承载二进制1和0的双频2FSK。首先对2FSK信号进行FM解调,再将解调的数据结果进行电平判决和定时同步,得到2FSK解调数据。本方法可以支持的符号率是30～120 kbps范围内的2FSK调制信号的解调,支持的频率偏移范围为5～240 k Hz。FPGA technology has been widely used in the field of electronic communication and signal processing,and has become the preferred scheme for the realization of communication instruments and equipment.FSK is an earlier modulation method used in digital communication. It uses different frequency carriers to transmit signals and uses digital baseband signals to control the frequency of carrier signals. The most common is dual frequency 2 FSK that carries two binary frequencies 1 and 0. Firstly,the 2 FSK signal is demodulated by FM,and then the demodulated data is judged by the level and synchronized with time to get the 2 FSK demodulated data. This method can support the demodulation of 2 FSK modulated signals with symbol rates ranging from 30 kpbs to 120 kbps,and the frequency offset range is 5 KHz-240 KHz.

关 键 词：FPGA FSK 2FSK解调 FM解调 

分 类 号：TN406[电子电信—微电子学与固体电子学]