地面数字电视系统中内交织器的FPGA实现

FPGA Implementation of Inner Interleaver in Digital Terrestrial Television System

在地面数字电视系统中,广播信道存在着突发噪声干扰和随机噪声干扰,而且前者的危害甚于后者。交织就是把集中的突发噪声引起的差错,按一定规律均匀分散给各码字,提高总体差错控制能力。该文介绍了DVB-T地面数字电视系统中内交织的原理和算法,并在此基础上,利用FPGA器件实现内交织器中的比特交织和符号交织。提出了一种新的数字信号测试方法———SignalTap。最后,经过仿真和硬件测试,得到预期的设计结果。

Indigital .terrestrial television system, there is much burst and random noise in the broadcasting channel, and burst noise is more harmfully than random noise. Interleaving equally divides mistake that is brought by burst noise into each code, and improves the capability of error control. This paper introduced the theory and algorithm of inner interleaver in DVB- T （digital video broadcasting ） system. And based on that, we used FPGA device to design the bit- wise interleaving and symbol interleaving of inner interleaver, and applied a new digital signal testing method Signaltap. At last, after simulation and testing on hardware, we got the result that we expected.