求翻译：可见，UWB在近距离能提供很高速率，结果还表明高阶PAM调制没有提高速率，这个问题可以这样理解，PAM是一种频谱有效的调制方式，但不是功率有效的。采用其他方法，如增加天线增益、提高编码增益、减小噪声、增大带宽能进一步提高传输速率和距离。是什么意思？

Seen, uwb at close range can provide a high rate results also show that high-end pam modulation does not improve the rate, this problem can be understood, pam is a spectrum and effective modulation, but not the effective power. By other methods, such as increasing the antenna gain, coding gain, redu

It can be seen at close range, UWB can provide a very high-speed, high-ranking results also showed that there was no improvement PAM modulation rate, this is an issue that can be so understood, is a spectrum PAM effective modulation, but power is not effective. Use of other methods, such as increasi

Obviously, UWB can provide the very high speed in the short distance, the result also indicated the higher order PAM modulation has not enhanced the speed, this question may understand like this, PAM is one frequency spectrum effective modulation way, but is not the power effective.Uses the alternat

Visible, UWB can provide very high rates at close range, the results also suggest that high level PAM modulation not to raise rates, the problem can be understood, PAM is a spectrum efficient modulation, but not the power. Using other methods, such as increased antenna gain, improved coding gain, re

正在翻译，请等待...