数字基带信道模拟器的设计与实现

Design and Implementation of Digital Baseband Channel Simulator

在通信新技术和新设备的研究过程中,需要进行大量通信试验,而在实际环境中开展试验需要耗费大量的时间和经费,因此利用信道模拟器代替实际信道在实验室范围内开展相关试验是一种较好的解决办法。设计了一种数字基带信道模拟器,能够实现延时、误码以及纠错编解码功能。阐述了FPGA内延时处理、高斯误码、通用误码、"RS+交织的纠错编解码"的实现,以及E1接口电路的设计。该信道模拟器适合于无线信道以及卫星通信信道的模拟,具有较高实用价值。

The researches of new communication techniques and devices require lots of communication experiments.Though it takes much time and money to implement experiments in real environment,the method of carrying out experiments by using channel simulator in laboratory environment may be a good solution.A digital baseband channel simulator is designed,which can realize time delay,error code insertion,error correction encoding and decoding functionalities.The implementations of the time delay process,the insertions of gauss type error codes and general type error codes,the code correction for RS＋interleaved,and the E1 interface circuit are described.The simulator is appropriate for wireless channels and satellite channels with high practical values.