自适应DMB-TH调制器的实现

The Implementation of Adaptive DMB-TH Modulator

介绍了一个基于DMB-TH的自适应调制器的解决方案。经前端信源编码后的TS码流通过高速的串行通信接收器进入调制器模块,调制器模块由FPGA实现对TS码流的随机化、信道编码和调制,其中详细介绍了信道级联编码的实现方法。为了实现自适应,DVB-T射频信号通过天线耦合到变频器电路的前端双工滤波器,再经过处理,变为DMB-TH信号发射出去。

In this paper, a solution of the adaptive modulator based on DMB-TH is discussed. After front-end source coding, the TS stream turns into the modulator module through the high-speed serial communication receiver. The modulator module implements the randomization of TS stream, channel coding, and modulation by FPGA and the cascade channel coding is introduced in detail. In order to achieve adaptive, the RF signal of DVB-T is coupled, through antenna, into the front duplex filter. Then the DMB-TH signal is launched out through antenna after processing.