摘要
在中低速散射通信中,调制解调器的位同步信号通常从含有同步信息的包络中提取。为了保证同步信号的信噪比,采用上述方法需要耗费大量FPGA资源。基于此,提出并分析了一种简单易行的抗衰落同步方法,即“飞轮”同步法。不但详细描述了该方法的算法原理,而且还用FPGA技术通过VHDL硬件描述语言编程实现了该位同步提取方案。
In the troposcatter communication at low rate or medium rate, a bit synchronization used by modem is usually extracted from the envelope that contains synchronization information. To guarantee the SNR of synchronization signal, it needs a great lot of FPGA resource for adopting the previous method. For this problem, we proposes and analyses an anti-fading synchronization method, named as flywheel, which is simple and implemented easily. This paper not only makes a detail description of the arithmetic theory of this method, but also realizes the bit synchronization scheme with FPGA by VHDL programming.
出处
《无线电工程》
2006年第6期57-58,共2页
Radio Engineering
关键词
位同步
FPGA
最大值
中低速散射通信
bit synchronization
FPGA
maximum
troposcatter communication at low rate or medium rate
