异步地震数据的GMSK调制解调器

Asynchronous GMSK modem used in transmission of seismic data

现在流行的24bit地震数据采集器只有异步数据接口,因此,将其与无线电台相连的GMSK调制解调器的数据接口亦应为异步数据接口。然而,在超短波信道上直接传送异步数据的抗干扰性极差,无法在干扰环境中可靠传送地震数据。在异步数据的GMSK调制解调器研制中开发了同异步转换和前向差错控制技术,实现了异步接口同步传送的设计方案。在无线信道中采用同步传送技术能提高设备的抗干扰性。异步GMSK调制解调器的研制成功,扩充了无线数传设备的应用范围,解决了异步地震数据传送的抗干扰问题。

The seismic data collector with 24 bits is provided with an asynchronous modem.When the seismic data collector links with GMSK modem,the data interface must have an asynchronous modem.But the asynchronous data transmission with channel of supper short wave has a poor anti-jamming ability.Using the technology of synchronous-asynchronous conversion and forward error controller,we develop the asynchronous data GMSK modem and achieve the data conversion from synchronization to synchronism.With this technology we increase the ability of anti-jamming.