論述了FCC 發(fā)射功率的標(biāo)準(zhǔn)對(duì)具有任意chip-duty 的DS-UWB 通信系統(tǒng)的影響。研
究了一個(gè)確定了峰值功率譜密度約束的情況，分析了影響平均傳輸功率的主要因素，從仿真結(jié)果可以看出低于最小chip-duty 的情況下平均傳輸功率不能隨著帶寬的增大而增大，隨著帶寬的增加，系統(tǒng)容量的增加量減小。
關(guān)鍵詞：超寬帶，功率限制，chip-duty，容量
Abstract: FCC established rules regarding UWB transmission systems. Impact of emission
constraints on DS-UWB communications that use arbitrary chip-duty is discussed in this letter. Simulation results show that, average emission limit depending on the communication pulse shape and peak-to-average ratios, a minimum chip-duty below which average emission cannot be increased with bandwidth due to the peak constraint is pointed. It is shown that a peak constraint slows down the capacity increment with bandwidth.
Keywords: ultra wideband, power constraints, chip-duty, capacity