为分析超宽带信号对GPS接收机是否存在干扰以及干扰程度的大小,现分别建立基于Matlab Simulink的UWB系统和GPS系统的物理层仿真分析模型。该模型通过对GPS系统加入UWB信号干扰,在GPS接收端得出的C/A码误码率来衡量超宽带信号对GPS系统的干扰程度。利用此模型进行仿真,可求出在不影响GPS接收机正常工作的前提下,UWB设备的最大平均发射功率。另外,DSUWB和OFDMUWB对GPS接收机造成的干扰也可以通过该仿真模型分别进行衡量和分析。
In other to analyze UWB interference to the GPS receiver,respective PHY simulation models of UWB system and GPS system based on Matlab Simulation are given. The models analyze the UWB interference level by means of calculating the bit error rate of C/A code of the GPS receiver. And the maximum allowed UWB signal power level is provided according to this model. Furthermore, the interference from the DS UWB and OFDM UWB are analyzed respectively.