交织器在MBOK基带调制系统中的应用  

Applications of interleavers in MBOK DS_UWB systems

作　　者：梁硕[1] 

机构地区：[1]桂林电子科技大学信息与通信学院,广西桂林541004

出　　处：《光通信研究》2008年第4期63-66,共4页Study on Optical Communications

基　　金：国家自然科学基金资助项目(60432040)

摘　　要：超宽带基带系统采用M元双正交键控(MBOK)调制,该调制方式在提高数据传输速率时无需大幅度增加带宽。为了提高数据传输的可靠性,文章在编码前加入一种块交织器,该设计的独特之处在于采用两块RAM交替进行读写操作,使交织器的延时最小化。用VHDL语言编程,在FPGA上用QUARTUSⅡ软件进行仿真,结果证明,在MBOK系统中加入交织器后可以交织随机化突发错误,便于系统纠错功能的实现。MBOK modulation is introduced in the UWB baseband system, for which no substantial bandwidth increase is necessary when the data transmission rate is to be boosted. In order to improve the data transmission reliability, a block interleaver is added before the data coding. What is unique to this design is that two pieces of RAM registers are employed for alternative reading and writing so as to minimize the time delay of the interleaver. Besides, programming is implemented with VHDL and simulations performed on FPGA with QUARTUS Ⅱ. The result shows that when the interleaver is added to the MBOK system, burst errors are interleaved for easier error corrections of the system.

关 键 词：M元双正交键控调制 现场可编程门阵列 块交织 

分 类 号：TN911.3[电子电信—通信与信息系统]