摘要
以第三代短波通信网络标准中的低速数据传输规程为基础,设计了一种低信噪比且存在多径衰落的信道中数据传输的调制解调方案。方案中利用相关搜索、FFT捕获的方法捕获信号,利用滑动相关完成位同步和信道估计,利用RAKE接收机抗多径衰落,并用DSP实现了数据的低误码率传输。
This paper designs a modem scheme for data transmission with low SNR and more path decline channels on the basis of data transmission at low rates in the network standard of the third generation of shortwave communication. Relevant searches and FFT catching are utilized to catch signals. The manner of shifting correlation is adopted to realize code synchronization and channel estimate. The RAKE receiver is employed to resist more path decline and realize the data transmitted with a low mistake rate.
出处
《电子科技》
2004年第5期39-42,46,共5页
Electronic Science and Technology
关键词
数据传输
位同步
信道估计
RAKE接收
data transmission, code synchronism, channel estimate, RAKE receiver.
