adaptive equalizer造句

• Study and realization of complex adaptive equalizer
  复自适应均衡器的研究及实现
• Nonlinear adaptive equalizer based on wavelet packet transform
  基于小波包变换的非线性自适应均衡器算法
• A new kind of adaptive equalizer used in vsb tech is brought out
  在此基础上，设计出了新一代用于vsb系统的自适应均衡器。
• The primary task of this dissertation is to design a hardware system of adaptive equalizer in the digital microwave communication system
  本文的主要任务是设计适合数字微波通信的自适应均衡器的硬件系统。
• Periodic training sequence is essential for the conventional adaptive equalizers to combat the isi , but it wastes plenty of bandwidth
  采用传统的自适应均衡技术抑制码间干扰，需要重复发送训练序列，占用大量本不富裕的带宽。
• To overcome the defect of the adaptive equalizers , this thesis deal with the technique of the blind equalization that need not the training period
  针对传统的信道均衡技术的缺陷，本论文研究了不需要训练码就能直接进行信道均衡的盲均衡技术。
• Methods of measurement for equipment used in digital microwave radio transmission systems - measurements on terrestrial radio - relay systems - adaptive equalizer
  数字微波无线电传输系统使用设备的测量方法.地面无线电中继系统的测量.自适应均衡器
• In ofdm tech , multicarrier transmission with fft is used to combat with channel fading . in vsb tech , an adaptive equalizer is used to combat with channel fading
  在ofdm技术中，以多载波传输结合fft技术来对付信道衰落，在vsb技术中以自适应均衡器来对抗信道衰落。
• Adaptive equalizer is a key device in modern data communication systems . it is capable of increase data transmission rates in modern digital radio communications systems
  自适应均衡器是现代数据通信系统中的一个关键设备，它可以最大限度地提高通信系统的数据传输速率。
• Methods of measurement for equipment used in digital microwave radio transmission systems ; part 2 : measurements on terrestrial radio - relay systems ; section 8 : adaptive equalizer
  数字微波无线电发射系统使用设备的测量方法.第2部分:地面无线电中继系统的测量.第8节:适配补偿器
• Methods of measurement for equipment used in digital microwave radio transmission systems . part 2 : measurements on terrestrial radio - relay systems . section 8 : adaptive equalizer
  数字微波无线电发射系统使用设备的测量方法.第2部分:地面无线电中继系统的测量.第8节:适配补偿器
• Methods of measurement for equipment used in digital microwave radio transmission systems - part 2 : measurements on terrestrial radio - relay systems - section 8 : adaptive equalizer ; amendment 1
  数字微波无线电发射系统使用设备的测量方法.第2部分:地面无线电中继系统的测量.第8节:适配补偿器.补充件1
• 3 . comparing several adaptive equalizers and using the combined dfe / mlse equalizer based on predicted signal to compensate the rss channel . simulation results suggest that the dfe / mlse is greater than dfe and le in performance and is simpler than mlse - va in complexity
  3 .比较了几种自适应均衡器的优缺点,提出采用基于预测信号的自适应组合判决反馈均衡器/最大似然序列估计器( dfe / mlse )来补偿再入遥测信道。
• By using ofdm technology , we can redu ce the baud rate with a high frequency spectrum utility factor . another advantage of this technology is that the transmission can combat the intersymbol interference ( isi ) at the receiver without complex adaptive equalizer
  Ofdm既有较高的频谱利用率，也有效地降低了码速率，在不使用复杂的信道均衡技术的条件下仍然可以较好地克服接收时由多径效应带来的码间串扰( isi ) 。
• This technique developed from fixed - equalization and auto - equalization to adaptive - equalization . conventional adaptive equalizer generally needs the transmission of a training sequence known at the receiver to make equalizer learn the characteristic of the channel , but this method brings to the transfer delay because of the inserting of training sequence , decreases the transmission rate of useful symbols and increases the system complexity
  传统的自适应均衡一般需要发射端发送接收端已知的训练序列，以使均衡器学习信道特性，但这就使信道传播过程中因训练序列的插入而引起传输延迟，降低了通信中的有效数据传输率，增加了系统的复杂度，并且在有些情况下发送训练序列并非都有可能。
• But the traditional adaptive equalizers need periodically retrained , because the underwater acoustic channel is a stochastic time - varying channel . although the traditional adaptive equalizer increase the reliability of the propagation , the rate of it is decreased . so they are not very applicable in the field of the propagation of high rate signals through an underwater acoustic channel
  但是由于水声信道的随机时变性，传统的均衡技术需要周期性的发送收端已知的训练码来跟踪信道的变化，这样做虽然提高了数据传输的可靠性，但是系统的重复训练大大的降低了通信效率，在水声信道高速率数据传输中并不适用。
• The underwater acoustic channel is very complex where cochannel interference , doppler frequency offsets , narrow bandwidth and time and frequency selective deep fades obstructs the development of high speed and fidelity underwater data transmissions . thus projects of high speed and fidelity underwater signal transmissions become a hotspot in the fields of world academic circles . the conventional serial communication must use adaptive equalizer to combat the multipath in real - time
  海洋水声信道是一种极其复杂多变的时-空-频变参信道，其信道窄，强多途干扰，信号起伏衰落严重，一直是水下信息可靠高速传输的主要障碍，因此如何在水声信道中高速率准确地传输数据，就成为世界性的热门课题。
• This thesis studies in adaptive equalization problems , and put the emphases in various adaptive equalizers , channel model , etc . finally , the performance of the presented blind equalizer which are used in digital microwave radio channel are compared and evaluated . the results are of great important in the development of more spectral efficient digital microwave radio - links . the focus is set on low - complexity adaptive equalizers for implementation in digital microwave radio systems
  本文围绕着自适应均衡技术进行了深入的探讨，重点研究了自适应均衡算法、信道模型等问题，并针对几种盲均衡算法应用于数字微波无线信道的均衡性能进行了仿真和比较，其结果对于开发具有更高频谱利用率的数字微波通信链路有着重要的指导意义。
• This thesis analyzed the error performance of mfsk and mpsk modulator in hf with optimal receiver , studied the shortcoming and strongpoint of several typical short - wave data transmission systems and their performance over fading and intersymbol interference channels . the theory and key technical of adaptive modem is discussed . in the last , an efficient modulation scheme - block coded modulation is introduced into hf radio systems to improve the efficiency of hf data transmission , this paper also proposes a hf data transmission system scheme composed of a block coded modulator and a decision feedback type adaptive equalizer
  本文在对短波数传两种常见调制方式fsk及psk最佳解调性能分析的基础上，讨论了几种采用典型调制技术的短波数传系统(如时频调制、多进制频移键控慢跳频、 chess系统)原理、优缺点以及抗衰落和抗符号间干扰的性能；分析了自适应串行数传系统抗短波信道衰落和多径干扰的原理、关键技术；在本文的最后引入一种有望解决短波数传系统低效率状况的调制方式bcm -分组编码调制，给出了一个采用bcm技术与自适应均衡技术相结合的短波数传系统方案，并通过计算机模拟进行了初部验证。
• In mobile communication , the multi - path of channel brines the inter - symbol interference ( isi ) which cna make the ber of system larger . a technology called adaptive equalizer combined with adaptive array antenna is researched . this technology is used in the base station to restrain isi , and it is realized through landscape orientation filter , whose weight vectors are formed by rls algorithm . the result of computer simulation showe that the ber performance of system is good enough to ensure the requirement of communication
  在移动无线通信中,由于传输信道的多径性质,会在接收端引起码间干扰,使系统误码率变大,结合智能天线系统研究了一种自适应均衡技术,在基站一端使用,用来抑制码间干扰,它通过横向滤波器来实现,通过rls算法自适应地产生加权因子.计算机仿真的结果可以证明,使用无衡技术后,系统的误码性能可能满足通信需要