However, ranging measurements are often subject to errors, induced by multipath signals and variations in path loss, unreliable hardware or antenna connectors, or imperfection in measurement models.

• 可是，距离测量往往容易出现错误，多径信号和路径损耗变化，不可靠的硬件或者天线连接器，或者不理想的测量模型都可能导致错误出现。