摘要
本文通过计算机仿真,研究了两种超宽带信号对QPSK方式的窄带传输系统得干扰影响。两种信号分别是多带正交频分复用超宽带信号和加性高斯白噪声信号。基于IEEE802.15.3a的高速无线个域网建议,对超宽带系统进行了建模仿真。通过误码率测试,评估了UWB信号对窄带系统带内干扰的改善程度。仿真过程中,采用了等效低通模型,这样可以减小仿真的复杂度。之外,测试了被干扰系统带宽变化时的干扰影响程度。
This paper reports on the study of the interference effects from 2 types of ultra wideband （UWB） sources on a QPSK transmission system by simulation. One is MB-OFDM UWB signal, and the other is Additive white Gaussian noise （AWGN）.The MB-OFDM UWB was modeled on the proposal in the IEEE 802.5.3a to standardize high-speed WPAN, Average bit erfor rate（BER） degradation of the victim system was evaluated under in-band interference from the UWB signal. A proposed modified equivalent baseband system was employed in the simulation which would reduce the simulation costs. Interference effects introduced due to the changing bandwidth of the victim receiver were examined.
