摘要
针对高速地空通信的需求,设计了一种300 Mbps高速调制解调器,提出了对信号并行处理的方法。从总体角度阐述了该设计的原理和组成结构,介绍了相关的软硬件关键技术,其中硬件部分给出了关键器件的选型及其使用方法,软件部分采用了多相分解的方法实现高速信号的数字滤波,并分析了并行结构下的定时同步和载波同步方法。通过软硬件结合的方法,解决了高速通信场合中器件速度有限、工作不稳定等问题。与传统串行方法相比,该技术具有硬件实现简单、性能良好以及同步稳定可靠等特点,适用于高速地空通信。
Aiming at the requirement of high speed ground-air communication system, a high speed modem of 300Mbps is developed, the method of parallel mode in signal processor is proposed. The principle and structure of this design is firstly expatiated from a whole perspective,then the corresponding key technique of software and hardware is introduced,and the hardware part includes the selection of key chips and operation methods,the software part uses lowpass polyphase filter to realize high speed signal filter. The symbol synchronization and carrier synchronization methods in parallel structure are analyzed. The software and hardware technique are combined together to solve the problem of limited hardware processing speed, unstable work performance in high speed communication. Compared with the traditional serial method, this technique has many advantages, such as simple hardware operation, good performance, stability and reliability and so on,and it can be applied to high speed air-ground communication.
出处
《无线电通信技术》
2013年第3期32-35,共4页
Radio Communications Technology
关键词
并行调制解调
多相滤波
定时恢复
载波恢复
parallel modem
polyphase filter
timing recovery
carrier recovery
