单信道

As a private mobile communication system, The digital trunkingmobile communication system was boomed in 1990's, and before this, the appliedprivate mobile communication systems in market are almost the analog systemwith analog voice and digital signalling. And there are no data referring to thesystem design and parameters chosen. It includes the wireless channel accessalgorithm of the mobile terminals, single base station capacity in large regional networks, link designing schemes between the switching control center and basestation as well as the study of the service quality for the multiple traffic. Theseindispensable parameters in design a digital trunking communication system arestudied in this dissertation and some instructive achievements can be got. To provethe correction of the theoretical study, the result was tested with the popularsystem of pan-European digital trunking communication system.

数字集群移动通信系统是九十年代中、后期兴起的专用移动通信系统的一种新体制，在此之前国际、国内市场使用的都是数字信令、模拟话音集群移动通信系统其涉及领域是模拟体制，对数字集群的系统设计的有关参数、方法等的选用及其性能表现并无成熟的文献可供参考，如移动终端的无线信道接入算法、大区组网单基站系统的容量、基站和交换控制中心间的链路设计和多业务种类的服务质量等都是数字集群基站子系统进行设计和开发必须解决的关键技术。

A new detection of telegraphic signal in short-wave channel is presented. It is based on the discrete Gabor spectrum analysis.

针对电报用单频信号的持续时长来携带报文信息及短波信道易于受到噪声污染的特点，研究了短波电报信号的离散Gabor谱检测方法。

Then,the Adaptive Equalizer on frequence domain is devised and the improved architecture of equalizer is given.

接着介绍了单复抽头自适应频域信道均衡器的原理并进行仿真，并给出了改进的方案即滑窗结构的均衡器。

In chapter 4, the channel estimation and equalization methods in real DTTB receivers are introduced irrespectively with ATSC-8VSB and DVB-T.

第四章以ATSC-8VSB和DVB-T为例，分别介绍了单载波和多载波方案数字电视地面广播接收机中常用的信道估计与均衡算法。

In terms of average Symbol-Error Rate at the destination, the performances of multi-relay cooperative transmission with Maximal Ratio Combining detection and opportunistic relaying with multi-node listening were analyzed, one relay retransmitting in Amplify-and-Forward networks under independent Rayleigh slow fading channels. The closed-form expressions of SER for M-PSK and M-QAM modulations are also derived based on Moment Generating Function.

该文从接收端平均误符号率的角度，分析了独立的瑞利衰落信道下，采用放大转发的多中继协同最大比合并检测方案和多节点侦听，单中继转发的机会中继方案的性能；并基于矩生成函数推导出两种方案下M-PSK和M-QAM调制信号平均误符号率的闭合表达式。

Outputs are single-ended quadrature A and B channels with up to 512 lines per rev plus an index pulse.

输出是单端A和B正交高达每信道512线转速加上索引脉冲。

In the aspect of global optimization, I study the RRA of single cell OFDMA system, including the subchannel allocation, power allocation and time domain scheduling.

在全局优化资源分配方面，论文研究了单小区OFDMA系统的资源分配问题，包括子信道分配、功率分配和时域调度。

Utilizing the entanglement property of Greenberger-Horne-Zeilinger state, a theoretical scheme to realize multicontrol remote single qubit unitary transformation is presented.

提出了一个用三粒子纠缠的GHZ态作为量子信道实现多点控制的远程单比特幺正变换的操纵方案。

While this situation is inadaptable for quantified description of time error in distributed cooperative measurement,this paper,integrat...

基于此，结合误差分析理论和网络被动测量的具体特点，提出了针对单点双信道被动测量系统的一般性时钟误差概率模型，引入误差不确定度来定量描述协调测量结果的精确度和合理性。

Wavelet packet based multicarrier modulation is a technique combining wavelet analysis theory and multicarrier modulation perfectly. It provides high frequency efficiency, better performance against intersymbol interference, intercarrier interference, tone and impulse interference and can transmit multirate symbols easily.

小波包多载波调制技术是一种新兴的多载波调制技术，是小波分析理论和多载波通信的完美结合，具有频谱利用率高和良好的抗符号间串扰、信道间干扰、脉冲干扰和单频干扰的优良特性，并且易于多速率传输。

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