光码分多址系统中二维QCC码的误码性能分析  

Bit error performance analysis of two-dimensional QCC for optical code division multiple access systems

作　　者：夏青[1] 李传起[2] 

机构地区：[1]南京信息工程大学电子与信息工程学院,江苏南京210044 [2]南京信息工程大学数理学院,江苏南京210044

出　　处：《量子电子学报》2009年第2期252-256,共5页Chinese Journal of Quantum Electronics

基　　金：江苏省高校自然科学基金面上项目(07KJB510066)

摘　　要：对基于一维二次同余码构成的QCC/QCC跳频扩时码和QCC/OOC跳频扩时码进行了详细的码字性能分析。通过计算不同情况下码字的碰撞次数,得出了互相关均值,并对这两种二维QCC码进行了误码率的仿真比较和理论分析。数值模拟表明,当码字长度确定时,QCC/OOC码的码字性能较QCC/QCC码更加优良,码字容量更大,但对跳频码片的要求较高。当码字容量确定时,较大p值的QCC/QCC码的码字性能更加优良,但码字长度相对较长。Based on one-dimensional quadratic congruence code performance of frequency-hop time-spread codes of QCC/QCC and QCC/OOC was analyzed. By calculating the number of hits of codewords in different situation, the mean value of cross-correlation is deduced, and the bit error ratio for two types of two- dimensional codes of QCC was simulated and compared. The simulation results show that compared with QCC/QCC, the performance of QCC/OOC is better and capacity is larger, but the number of frequency-hop chips is larger when the code length is determined. When the capacity of code family is determined, the performance of QCC/QCC with large value of p is better, but code length of it is longer.

关 键 词：光通信 误码率 码字性能分析 二维QCC码 

分 类 号：TN929.1[电子电信—通信与信息系统]