摘要
研究了新型NAVTEX系统的部分技术参数和关键电路。给出了系统原理框图和接收机技术指标,探讨了系统的信源以及编码方式,信号的技术格式,解扩解调环路的数学模型,伪随机码定位原理。设计了仿真模型,进行了仿真实验。实验结果表明新型系统比原系统提高了信息传输速率,降低误码率。
It is presented that various kinds of technical parameters and key circuits of new - type chinese character code for NAVTEX system, And it＇s provided that systematic block diagrams and preliminary technical indicators. The systematic message source and encoded mode, technological form of signal, mathematics model of demodulation and despread loop, pseudo code position have been probed. Simulation model has been designed and simulation experiment also has been carried on. The experimental results showed the new - type system had been improved that the transfer information rate is enhanced and the bit error rate is lower comparing with the previous sytem,
出处
《信息技术》
2005年第8期16-18,共3页
Information Technology
基金
哈尔滨市青年科学基金资助项目(2003AFQXJ053)
