| 1. | Ofdm combined with channel coding ( cofdm ) can enhance the ability to lower the effect of multipath fading . 2
信道编码与ofdm的结合( cofdm ) ，增强系统进一步提高消除多径影响的能力； 2 |
| 2. | 54 ye z , krishnamurthy s v , tripathi s k . effects of multipath routing on tcp performance in ad hoc networks . in proc
然而，前者出现了过时的路由信息，后者则会引起乱序，这也会降低tcp的性能。 |
| 3. | The effect of multipath propagation commonly exists in the underwater acoustic channel and the fading which was caused by multipath propagation was the main influence factor of underwater acoustic communication system
水声信道中广泛存在着多径传播效应。由多径传播引起的信号衰落现象是影响水声通信系统性能的主要因素。 |
| 4. | Analysis in theory and data processing show that the dgps positioning error comes from the effect of multipath mostly , and rtk positioning error comes from the effect of multipath and the receiver noise
理论分析和数据处理结果表明： dgps的定位误差主要由多径效应引起，而影响rtk定位误差的主要因素包括接收机的测量噪声和多径效应。 |
| 5. | The effect of multipath , which can not be removed through differential gps positioning , is studied in theory exceptionally . at the same time , the dgps and rtk are constructed , and a lot of dgps and rtk positioning data are collected
2 )分析了影响gps定位精度的各种因素，深入研究了差分系统无法消除的多径效应；构建了dgps和rtk系统，采集了大量观测数据。 |
| 6. | Chapter 3 investigates the capacity improvement in cdma multi - cellular system with base - station smart antenna . we consider the effects of multipath interference , thermal noise , path loss , processing gain and voice activity factor . and introduces multiuser detection combined with smart antenna
考虑了多径干扰、热噪声、路径损耗、处理增益和语音激活因子的影响；并介绍了与智能天线技术相结合的多用户检测技术。 |
| 7. | This paper concentrates on the orthogonal frequency division multiplexing ( ofdm ) technique and some techniques to resist multipath fading . eliminate isi through use of a cyclic prefix . diversity techniques . using adequate ofdm combined with channel coding ( cofdm ) can enhance the ability to lower the effect of multipath fading
本文研究了ofdm的基本原理及抗多径衰落的一些措施，如加循环前缀，利用多径进行分集接收，将ofdm与信道编码及交织结合起来，频域均衡。 |
| 8. | Then combining the idea of likelihood ratio detection and the template matching method , this paper put forward a matching detection method for detecting hovering helicopter using missle - borne pulsed doppler radar . in the third part of this paper , the author analized the effect of multipath to the detection using radar , and put forward a modified m n detection structure to the detection of hovering helicopter under multipath circumstance
本章的第三部分阐述了多径干扰对雷达检测性能的影响，提出了一种应用于多径效应环境中检测目标回波的修正mm检测结构并应用于悬停直升机的检测过程，分析了该算法的检测性能及其与检测结构的关系。 |
| 9. | Firstly , the effects of short - delay multipath to the dll , pll , and snr of receive signal are discussed . then the effects of multipath to multiple closely spaced antennas are presented . and solve the problem by promote a new method based on extended kalman filtering , which utilize the correlation of measure data of dll , pll and snr of each antenna
最后，利用小范围多天线系统中多径信号对接收机码环、载波环及信噪比影响的相关性，提出了基于扩展卡尔曼滤波器的多径干扰抑制技术，解决了近距多径信号的抑制问题。 |
| 10. | With the development of information technology and internet , net communication , satellite communication , all kinds of conference call and in some special conditions , like underwater acoustic communication demand it more reliable and can keep secret and be low probability of interception . because of the effect of multipath and doppler shift , the signals through the channel fade rapidly
随着人类向信息技术和信息网络时代的迈进，网络通信、卫星通信、各种电话会议以及某些特殊的通信场合(如水声通信)中都对通信的保密技术、低截获率和可靠性提出了更迫切的需要和更高的要求。 |
