【摘要】 针对多带正交频分复用(MB-OFDM)通信系统存在窄带干扰的问题,提出了一种基于高阶旋转扩展矩阵的多带OFDM系统。同时用误差权重分布方法分析各种角度的高阶旋转扩展矩阵及其它正交扩展矩的分集度,并在实验仿真中比较了各种扩展矩阵对MB-OFDM系统性能的影响,结果表明各种角度(π/2除外)的高阶旋转扩展矩阵进一步提高超宽带系统抗窄带干扰的能力。更多还原

【Abstract】 A new multi-band orthogonal frequency-division multiplexing(MB-OFDM) system based on higher order rotation spreading matrix is proposed to suppress the detrimental effects of narrowband interference on the ultra-wideband(UWB) MB-OFDM system.By the method of error weight distribution,the diversity degree of higher order rotation spreading matrix with different angles and other orthogonal spreading matrixes is analyzed.The effects of various spreading matrixes on MB-OFDM system are compared through simulation.Numerical results show that the higher order rotation spreading matrixes with different angles(except π/2) enhance the robustness of the system to narrow-band interference effectively.更多还原