This paper introduced a dynamic layered multicast scheme, DLM, to address multicast receivers 'heterogeneity in available bandwidth. DLM uses an optimal layer rate allocation algorithm which can maximally satisfy each receiver's available bandwidth. 针对多播接收者的可用带宽异构性问题,提出了一种动态分层多播拥塞控制算法(DLM),DLM运用最优化层传输速率分配算法来自适应地满足接收者的异构性。
Under studying the function of a multi-mode polarization Synthetic Aperture Radar ( SAR), the operation parameter, mixing, filtering method for digital IF receiver is presented based on Field Programmable Gate Array ( FPGA). Digital quadrature demodulation for three bandwidth signal is realized. 针对一种多模式极化合成孔径雷达(SAR),给出了中频数字接收机工作参数选择,混频滤波方法,实现了三种带宽信号的数字正交解调。
Portable Weather Satellite Imagery Receiver With Bandwidth Compress Technology 采用中频压缩技术的便携式气象卫星云图接收机
Taking the signal processing unit of an IR searching system as a pulse receiver, and considering the effect of bandwidth of the pulse receiver on the output signal-to-noise ratio, the range equation of IR searching system is derived. 将红外搜索系统的信号处理单元视为脉冲接收系统,在考虑其带宽对输出信噪比的影响下,推导了红外搜索系统的作用距离方程。
With a devising technique of the narrowband filter, a new design method of the UWB receiver was presented and the demand for design of the filter center frequency and bandwidth also were quantificational given. 利用窄带滤波器设计技术,提出了一种新型UWB接收机设计方法,并定量给出了滤波器中心频率和带宽设计的要求。
The MIMO technology is considered as the key technology in the next generation of wireless communications ( beyond 3G/ 4G), which deploys multi antennas at both transmitter and receiver to enhance system capacity without using additional bandwidth. MIMO技术被认为是新一代移动通信(beyond3G/4G)的核心技术之一,它利用多个天线进行收发,能在不占用过多带宽的情况下提高系统的容量。
Secondly, in light signal reception unit, low noise avalanche diode, due to its high responsivity to special wavelength, acts as optical receiver, extracting useful signal with the combination of high bandwidth amplifier and high speed comparator; 其次,在光信号接收方面,使用对特殊波长响应度极高的低噪声的雪崩二极管作为接收器件,利用高带宽信号放大芯片对信号进行放大,并结合高速比较器来提取有用信号;
Frequency characteristic of receiver coil in shallow seafloor transient electromagnetic sounding system& The Influence of bandwidth on the low subsurface resolving power 浅海底瞬变电磁法接收天线频率特性研究&带宽对浅层分辨的影响
On the other hand, based on the analytical results of the resonant PINFET optical receiver, a series resonant PIN-FET optical receiver was developed using microwave hybrid integrated technology which has a good improvement on frequeney response bandwidth. 同时,在对谐振式PIN-FET光接收机进行噪声分析的基础上,采用微波混合集成工艺研制了一个串联谐振式PIN-FET光接收组件,有效地提高了PIN-FET的频响带宽。
Choice of Receiver Bandwidth for Complex Radar Waveform 复杂波形雷达接收机的带宽选择
A GaAs monolithic integrated transimpedance preamplifier for 10 Gbit/ s fiber-optic communication receiver has been designed, fabricated and characterized. The bandwidth of the preamplifier is increased effectively by using series inductor technology. 完成了工作于10Gbit/s速率的跨阻前置放大器电路的器件设计、电路设计,电路采用了串联电感L技术,有效地提高了工作带宽。
The result shows that the receiver performance of BER is relevant to not only signal-to-noise ratio, but also input noise bandwidth and integration time. The characteristics can be applied to other kind of autocorrelation receivers. 表明该种接收机误码性能不仅与信噪比有关,而且与噪声输入带宽和积分时间有关,其特性可类推到其他类型的自相关接收机。
Pulse Compressive Receiver system Based Big Bandwidth SAW RAC 超大带宽声表面波脉冲压缩接收机系统
Therefore, people have started to investigate novel signal transmission techniques and advanced receiver signal processing methods to increase wireless capacity without attendant increase in bandwidth or power requirements, and multiuser detection technique is one of the most important research domains. 因此,最近几年人们致力于研究新的信号发送技术和先进的接收机信号处理方案来提高无线容量,多用户检测技术便是其中的一个主要研究方向。
Discussion on EMC Measuring Technique& Selection of Receiving System Sensitivity and Receiver Bandwidth 电磁兼容性(EMC)测试技术探讨&接收系统灵敏度和接收机带宽的选择
Traditional analog receiver has the following characteristics, such as high processing speed, wide instantaneous bandwidth, high intercept probability. 传统的模拟接收机,处理速度快、瞬时带宽大、截获概率高。
The effect of the measurement error produced by error source thermal noise and high dynamic of the receiver carrier is analyzed; the best bandwidth of each loop in design is given. 分析了伪码载波跟踪环中误差源热噪声和接收机载体动态性对环路测量误差的影响,给出了各环路设计的最佳带宽。
Compared to EPON and GPON, WDM-PON has a simple framework and does not consist of the following series of sophisticated techniques such as burst-mode transmitter and receiver, as well as dynamic bandwidth allocation, ranging and precise control of latency. 相对于EPON和GPON,WDM-PON的构架简单,不需要EPON/GPON的突发模式发送和接收以及动态带宽分配、测距和时延精确控制等复杂技术。
In P2P file sharing systems over mobile cellular networks, the bottleneck of file transfer speed is usually the downlink bandwidth of the receiver rather than the uplink bandwidth of the senders. 除此之外,在基于移动蜂窝网络的P2P文件共享系统中,文件传送速度的瓶颈通常是接收端的下行链路带宽而非发送端的上行链路带宽。
In this dissertation, we study lexicographically fair bandwidth allocation in network coding based multi-session layered media multicast to allow each receiver of each session to share network bandwidth fairly. 本文研究基于网络编码的多会晤多播的词典序公平带宽分配问题,以使得各会晤的各接收节点能够公平地分享网络带宽。
In order to receive these wideband radar signals, the wideband digital receiver that has large instantaneous bandwidth, large dynamic and high sensitivity becomes a development demand. 为了适应此类宽带雷达信号的接收,急需发展大瞬时带宽、大动态范围、高灵敏度的宽带数字接收机。
Simulation results show that the algorithm can make each receiver of each session utilize the network bandwidth resources fairly without sacrificing too much throughput, and its bandwidth utilization is efficient. 模拟实验表明本文算法能够在不损失过多吞吐量的情况下使得各会晤的各接收节点公平地利用网络带宽资源,且带宽利用率高。
Hence, this thesis proposes a novel fully differential optical receiver with advantages of a doubled sensitivity and a much better bandwidth compared with a present differential optical receiver. 因此,本论文提出了一种全差分光接收机,其优点是可使现行差分光接收机的灵敏度倍增和带宽明显提高。
APD receiving assembly is often used as a key device of the receiver in high-speed optical fiber communication systems due to its advantages of internal gain and wide bandwidth. 雪崩光电二极管组件具有内部增益、宽带宽的优点,作为接收机中的核心器件常被用在高速光纤通信系统中。
The all-digital receiver with QAM modulation mode, with its all-digital processing and high bandwidth efficiency and other advantages, was widely used. 采用QAM调制方式的全数字接收机,以其全数字化处理和较高的频带利用率等优势,得到广泛的应用。
Besides, it can be realized to work under the narrow-band transmitter and receiver for its relative narrow instantaneous bandwidth. So SFP is the utility high-resolution signal mode because of its easy engineering operation. 另外,该信号又因具有较窄的瞬时带宽,可以在窄带发射机、接收机的条件下工作,易于工程实现,是一种实用性很强的高分辨力信号形式。
As it determines some important parameters of the receiver, such as sensitivity and bandwidth, the limiting amplifier which affects the entire performance of network is a key device in the optical fiber receiver of optical fiber communication. 限幅放大器作为光纤通信中光纤接收机的关键器件,其决定了接收机的灵敏度、带宽等重要参数,影响着整个光纤通信系统的性能。
Meanwhile, various receiver modules are designed respectively to accept step frequency signal, and their properties are simulated, such as receiver bandwidth, VSWR and so on. 然后分别设计了实现接收步进频率信号的接收机的各个模块,并仿真了它们的性能,如接收机带宽、驻波比等。