多音干扰环境中时频二维扩频系统的性能  

Performance of Time-Frequency Two Dimensional Spread Spectrum System in Multi-tone Jamming Environment

作　　者：周键[1] 唐友喜[1] 谢胜琳[1] 李少谦[1] 

机构地区：[1]电子科技大学通信抗干扰技术国家级重点实验室,成都610054

出　　处：《电子与信息学报》2006年第11期2107-2110,共4页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(60272009;60472045;60496313);国家"863"计划(2003AA12331006);教育部博士点基金(20020614001)资助课题

摘　　要：该文分析并仿真了加性白高斯噪声信道多音干扰环境中的时频二维扩频的比特误码率性能。理论分析发现,当多音干扰在子载波中心频率上、且二维扩频矩阵多音干扰所在的子载波对应的时间轴所对应的行元素之和为零时,多音干扰被完全抵消。同时给出了计算机仿真结果。结果表明,理论分析与仿真结果吻合。This paper investigates the Bit Error Rate （BER） of the time-frequency 2-Dimensional Spread Spectrum （2DSS） in Additive White Gaussian Noise （AWGN） channel with the presence of multi-tone jamming. Analytical results indicate that the harmful effect caused by the multi-tone jamming can be completely eliminated when the jamming signals are placed on certain sub-carriers＇ central frequencies and if the corresponding row sums of the 2-dimensional spreading code matrix are equal to zero. The simulation results are provided, which show the agreement between theoretical analysis and simulation results.

关 键 词：多音干扰 直接序列扩频 MC-CDMA 时频二维扩频 抗干扰 误码率 

分 类 号：TN914.42[电子电信—通信与信息系统]