通过天体观测，我们已经确认了银河系里约1800颗脉冲星，其中大部分都能发射出无线脉冲信号，信号的强弱随着这些脉冲星的旋转产生变化。
Sky surveys have identified about 1800 pulsars within the Milky Way, most of which emit pulsing radio signals that rise and fall as the pulsars spin.
本文介绍一种超宽带无线接入技术的特点和接收、发射部分的基本结构。
The paper introduces the characteristics and the structure of receiving and sending of UWB wireless access technology.
所设计的病区无线呼叫系统主要分为发射和接收两大部分。
The design of the wireless unit to call the main system is divided into two parts, transmitting and receiving.
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