基于DS-UWB的可变码扩频及同步的FPGA实现  

FPGA Realization of Variable codes's spread-spectrum and synchronization of baded on DS-UWB

作　　者：李勇[1] 余宁梅[1] 

机构地区：[1]西安理工大学电子工程系,陕西西安710048

出　　处：《电子技术应用》2007年第9期55-59,共5页Application of Electronic Technique

摘　　要：为了提高扩频系统中同步接收机的灵活性,利用DS-UWB无载波的特性,设计了一种码长及码型可变、工作在码片速率的扩频及其同步电路,在扩频电路设计时分别采用了PN码和三进制码,同步模块可以复用,采用Verilog HDL描述电路,然后对该电路进行了功能和时序仿真,最后在Altera的CycloneⅡ系列芯片上验证了该电路,并对采用两种扩频码的适用场合进行了分析。In order to improve synchronizing receiver＇s circuit flexibility in spread-spectrum system, a synchronization circuit which is without carrier wave tracking loop and works at a chip rate is designed according to the character of DS-UWB without carrier wave. PN code and ternary code are used in spread spectrum circuit design. Synchronization module is multi-used here. Then this circuit is described by Verilog HDL and both functional simulation and timing simulation are done. Finally, this circuit is verified with Ahera＇s CycloneII circuit . These two codes＇ s application situations are analyzed here.

关 键 词：MBOK PN 扩频 同步 无载波 DS-UWB 

分 类 号：TN92[电子电信—通信与信息系统]