time-term method

In order to reduce the interference to other communications systems during transmission, the method of spread spectrum is proposed, including the time hopping and direct sequence.

为了减小在传输过程中对其他通信系统产生干扰，提出了频谱扩展的方法，包括时间跳跃和直接序列。

In order to reduce the effects of MUI, this paper presents a novel waveform design method based on wavelet& combined waveforms, and this waveform is used in a multiple access system with time hopping ( TH) sequence.

为了降低多用户干扰的影响，提出了一种新型的基于正交小波的脉冲波形构造方法&组合波形，并且将这种波形连同跳时序列一起应用到多用户系统中。

This paper gives a serial acquisition method which can be easily implemented in time hopping ultra-wide band system.

根据超宽带系统多径延迟的特点，该文给出一种易于实现的超宽带跳时串行捕获方法；

Pseudo-chaotic time hopping is a modulation method which is suitable for ultra wide-bandwidth impulse radio communication systems.

伪混沌跳时是一种适用于超宽带脉冲无线电通信系统的调制方法。

Objective To investigate the method, time, effect, indication and complication of double J tube in the operation of upper urinary calculi.

目的探讨双J管在上尿路结石手术中的置管方法、时间、效果、适应证及并发症。