中文摘要：

利用相关标准或文献给出的性能参数要求和干扰保护准则，对16种机载无线导航和通信设备的最大允许干扰功率进行计算。在路径损耗为零的保守假设和超宽带（UWB）设备与其它设备最小距离为1m的假设下，通过计算最大允许等效全向辐射功率，分别得到两组机载超宽带信号需要满足的功率谱限制条件。基于这些功率谱限制条件，计算了IEEE802．15．4a标准参考超宽带信号在各规定信道上的最大允许功率谱密度峰值。结果表明，在给出的功率谱限制条件下，IEEE802．15．4a标准规范的设备在6GHz以上的某些信道仍允许以较大的功率工作，保证10m距离低速率信号传输。给出的限制条件可以作为选择机载UWB设备使用波形、调制方式或工作信道的参考依据。

英文摘要：

The maximum allowable interference power of 16 types of airborne wireless navigation or communication devices is computed depending on the minimum operational performance requirements and interference protection criteria from standards or reports. Two sets of emission power spectrum limits for airborne UWB device are presented by computing the maximum allowable EIRP （Effective Isotropic Radiated Power） respectively under the assumption that path loss is zero and the assumption that minimum distance between UWB device and other airborne device is 1 meter. Based on these limits,IEEE 802.15.4a standard compliant UWB signals of different channels are examined to calculate the maximum allowable value of the peak of power spectrum density. The result shows that IEEE 802.15.4a compliant devices are allowed to work in relative high power to insure lowrate transmission in 10 meters on some channels above 6GHz under given limits. The limits given in this paper can be used as a reference when choosing waveform, modulation or channel for airborne UWB devices.