查询词典 radio channel

The radio channel is time-variant, frequency-selective and noisy, so the received OFDM signals are corrupted by intercarrier interference.

但是由于无线信道的多径性和时变性，造成了接收端 OFDM 符号子载波间的干扰，为了能够准确地解调 OFDM 信号，就必须对接收到的信号进行信道估计。

In anFDD wireless system, the duplex spacing between uplink and downlink islarger than the coherence bandwidth of the mobile radio channel, thus theuplink and the downlink small-scale fading is uncorrelated. Moreover, thearray response is correlated with the frequency of the signal carrier. So it isimpossible to resue the uplink weights for downlink beamforming. As aresult, the application of smart antenna for the downlink is a difficult problem.

在频分双工系统中，由于上、下行载波的频率差大于相干频带，上、下行信道衰落是不相关的，而且阵列响应也与信号的载波频率有关，因此，上行信道不能直接用来估计下行信道，故智能天线应用于下行链路是一个难点。

And the basic principles of coding and decoding of Turbo Codes are discussed, the MAP and Max-Log-MAP algorithms which are suitable for the Turbo Code are detailedly discussed. Then, because the interleaves technology has important influence in radio channel, the article provides the detailed scheme of implementation in WCDMA system. Besides providing a series of simulation illuminates the influence of interleave-length to the Turbo-code performance.

由于交织技术是为了抵抗无线信道的噪声以及衰落的影响而采取的时间分集技术，在WCDMA的编码过程中具有重要的作用，所以本文对交织技术在WCDMA系统中的应用也做了详细介绍，并且通过仿真说明了交织长度对Turbo码性能的影响。

Multiple modulators are provided, a respective one of which corresponds to a respective one of the radio channel frequencies.

提供多个调制器，其相应的一个对应该无线电通道频率相应的一个。

This is the most popular radio channel in England.

这是英国最普遍的收音机频道。

Once you are there, set your radio channel to the directed frequency and begin gathering information.

当你到达那里时，把你的无线电信道调整到指定频率然后开始收集情报。

However, for the wireless mobile communication systems, the radio channel is frequency selective and time-varying.

对于无线通信系统，无线信道不仅是频率选择性的，而且是时变的。

Specify your own radio channel based on genre, year and artist.

指定自己的广播频道流派的基础上，今年和艺术家。

In this project, developing and validating radio channel models are our major goal.

本子项计画以开发及验证无限通道模型为主要目标。

By theoretical analyses and computer simulation, it is indicated that this algorithm shows good performance in estimating effective order of radio channel.

通过理论分析和计算机仿真表明，SMCC-plus系统使用本算法能够对相邻两个符号之间的信道特性变化较小的信道进行估计和跟踪。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了