This dissertation proposes to adopt poly - phase filtering channelized receiver to receive the special multi - carrier ds - cdma signal , which is studied by this dissertation , and use digital matched filter to de - spread signal 在此基础上提出采用多相滤波器组信道化接收机来接收本文研究的多载波扩频通信信号，并使用数字匹配滤波器进行解扩。
Digital channelized receiver is good at real - time signal processing , especially at improving ability of whole probability capturing as well as resolving the problem of channels ’ in - equilibrium of analog channelized receiver 数字信道化接收机可以提高实时处理能力,特别是提高全概率截获能力,并且可以有效地解决模拟信道化接收产生的信道不均衡的问题。
The frequency curve of transverse distribution of the wheel track on divided ways reveals that the frazzled damage of highly channelizing expressway cement concrete pavement largely occurs in the peak range of distribution curve of the wheel track 摘要分车道行驶轮迹横向分布频率曲线显示，渠化程度较高的高速公路水泥混凝土路面磨损破坏主要集中在行车道轮迹峰值范围。
( 2 ) an analog - digital channelized receiver is given . two key techniques of this receiver , including how to achieve data conversion effectively and frequency estimation precisely , are introduced briefly . the change of channelized lfm signal is discussed 给出了一种目前可实现的模数混合信道化接收机方案,简要介绍这种接收机的关键技术? ?高效的数据率转换以及超宽带线性调频信号测频算法。
A modified real signal model of channelized transmitter is presented that employs multiphase filters and discrete fourier transform to maximize computing efficiency , which can mean much in a radio communication system that requires real - time processing 特别提出了改进的实信号信道化发射机数学模型，通过利用多相滤波与离散傅立叶变换，减少信号处理运算量，这对于强调实时运行的无线通信系统有重要意义。
Channelized receiver with poly - phase filters is an appropriate solution . in this thesis , the design and implementation of channelization processing are studied systematically . meanwhile , we put forward a new implementation method and get some conclusions and achievements 本文结合具体的研究项目,对基于多相滤波的数字信道化接收机中的信道化处理进行了系统的研究,并提出了一种新的实现方法,取得了部分研究成果。
And designed a program used by this method to design a filter . the result complies with the analytic result . at the end of this paper , according to the project of airline broadcast , the author designd filter with high rectangular factor , five channelizing filter banks , saw programmable correlator implemented with multiplayer muti - chip technology , saw resonator 本文的最后，结合某航空直扩数传电台的工程要求，设计了高矩形系数的前置滤波器、声表面波滤波器组、采用多芯片组装厚膜工艺技术的声表面波可编程相关器和声表面波压控振荡器，完成了解调解扩单元的硬件设计。
As the modern highway transportation characterized with high speed , high traffic density , heavy load and channelized traffic , the technology of asphalt pavement have been changed greatly and many methods had been developed to improve the performance of asphalt pavement , such as the superpave ? , the technology of modified asphalt , the sma , etc . . among them , the fiber strengthened asphalt pavement is a successful alternative both domestically and overseas 为了适应现代交通速度快、交通密度大、轴载重、渠化交通明显的特点，沥青路面技术发生了较大的变化，高性能沥青路面superpave ~ ( tm ) 、改性沥青技术、 sma等得到了应用，而纤维沥青路面以其技术性能优良、经济上合理等特点受到人们的关注，具有广阔应用前景。
The paper gives a kind of fft channelizing scheme used in the item , by analyzing different methods of reconnaissance and jamming for hopping frequency communication . and the paper gives a kind of design of frequency synthesis system on the basis of fpga and dds technology , and fpga is used to control the dds chip to produce different jamming signal 文章通过对目前各国正在研究使用的几种跳频通信侦察方案以及通信对抗中所用的各类干扰方式的介绍与分析比较,提出了一种在本实验系统中应用的fft -信道化侦察测频方案,并在此基础上设计了一种基于fpga和dds技术的频率合成模块,采用fpga控制dds芯片产生各种干扰信号。
Now , there are four evaluation methods in this field , every method has its advantages and shortages and most of them are established based on highway . high weight communication , great loads channelized traffic and high speed is the expressway ' s feature , there is great difference in the development law between highway and expressway . we will get some unfitness result by using those evaluation methods to evaluate expressway 目前国内外常用的四类路面使用性能评价方法中回归法评价结果与实测数据相关性不太理想，系统分析法客观性不强，灰色理论法存在一定的主观经验性，其它一些方法还处于研究阶段；而且这些方法都是基于普通公路建立，高速公路具有交通量大、汽车轴载重、交通渠化和行车速度高等特点，路面使用性能的特点和发展变化规律与普通公路存在较大差异。
