分析了超宽带冲激无线电的脉位调制、通断键控调制和脉冲幅度调制的信号模型。

The ultra wideband (UWB) radio models have been introduced with pulse-position-modulation (PPM), on-off-keying (OOK) and pulse-amplitude-modulation (PAM).

youdao

脉冲位置幅度调制(PPAM)是一种将脉冲位置调制(PPM)和脉冲幅度调制(PAM)结合到一起的新型调制方式。

Pulse position amplitude modulation (PPAM) is a new modulation scheme that combines pulse position modulation (PPM) and pulse amplitude modulation (PAM) together.

youdao

文章分析此类信道模型下脉冲位置调制和脉冲幅度调制的性能，结果表明，在频率依赖性信道中PAM调制优于PPM调制。

This paper has analyzed the performance of PPM and PAM under frequency dependence channel model, the results have shown that the PAM is better than the PPM in frequency dependence channel.

youdao