信号带宽

用Matlab工具软件完成了该电路的功能仿真，为下一步提高该系统的工作频率和信号带宽作好了准备工作。

To improve system frequency and signal bandwidth in research , Matlab tool is made to carry out function simulation .

OFDM系统将宽的信号带宽分解成在很多个窄带子信道中并行传输。

The OFDM system divides the wide signal bandwidth into many narrowband subchannels that are transmitted in parallel .

扩频通信是扩展频谱通信（SpreadSpectrumCommunication）的简称。它是指用来传输信息的射频信号带宽远大于信息本身带宽的一种通信方式。

Spread spectrum communication is a communication way of transmitting information with much wider bandwidth of radio-frequency signal than that of the information signal itself .

SAR成像中R-D方法与信号带宽之间的关系

The relationship between R-D algorithm and signal frequency width in the SAR processing

sigmadelta调制器利用了噪声整形技术，将信号带宽内的噪声搬移到信号带外。

Sigma Delta modulator using the noise shaping technology , will move noise into the outside of the signal bandwidth .

只要严格地选取ADC的采样速率，频率估计误差就能控制在与信号带宽和其他因素有关的误差范围内。

With choosing ADC sampling rates strictly , the errors of the estimated frequencies are bounded by signal frequency band and other factors .

目前，制约DDS应用的最大因素是其杂散抑制特性差，特别是在输出信号带宽较宽的情况下更是如此。

Currently the essential limitation factor of the DDS is the poor performance of the spurious suppression especially in the condition that bandwidth of the output signal is wide .

而在对信号带宽要求较高的领域，如无线通讯等，离散型sigmadelta调制器的设计变得更为困难。

The design of Discrete-Time ( DT ) Sigma Delta modulator becomes more and more difficult when regarding the fields that high requirements of signal bandwidth are needed , such as wireless communication .

基于MIMO的空时编码技术可望在不牺牲发射功率和信号带宽的条件下，满足未来无线通信中高速数据率传输的需求。

MIMO ( Multiple-Input Multiple-Output ) based STC ( Space-Time Coding ) technology can meet the need of high data-rate transmission in future wireless communications without any loss in bandwidth and transmitting power .

Chirp-EWB（Chirp-ExtremeWideBand）具有数吉赫兹（极宽带）的信号带宽，其应用于中远距离传输时有着独特的优势。

Chirp-EWB ( Chirp-Extreme Wide Band ) has its own advantages in medium and long distance communication because of its several GHz bandwidth .

文中针对这种移频干扰，分析给出相应的抗干扰措施，包括适当调整信号带宽和基于独立分量分析（ICA）的抗干扰算法，经过仿真证明其有效性。

Integrated with the shift-frequency jamming , the thesis analyzes corresponding anti-jamming measures , including adjusting the signal bandwidth appropriately and anti-jamming algorithm based on Independent Component Analysis ( ICA ) .

考虑到WiMAX信号带宽较大，频段较高，所以在选取数模转换器、模数转换器及数字预失真芯片时都采用了处理带宽能力较强的芯片。

Considering WiMAX signals have large base band and high frequency , digital-analog conversion , analog-digital conversion and digital pre-distortion chips with high performance on base band processing are chosen .

高分辨率星载聚束式SAR的信号带宽与多普勒带宽很大，为了保证系统的覆盖特性和成像处理精度，常规的成像处理方法已不能适用。

Signal band and Doppler band are very large in order to realize precise imaging of high-resolution spaceborne spotlight SAR . At the same time normal imaging methods can not satisfy the radar system coverage performance and the precision of imaging .

多输入多输出（MIMO）系统能够在不增加发射功率和信号带宽的条件下，充分利用空间资源，成倍增加信道容量和频谱利用率，因而受到广泛的关注。

Multi-Input Multi-Output ( MIMO ) system could make full use of space resource , and increase the channel capacity and spectral efficiency without increasing the transmission power and signal bandwidth , which therefore has been widely concerned .

信道状态信息（CSI）对于无线通信来说至关重要，而叠加训练序列的信道估计方法由于不占用额外的信号带宽和具有较高的估计精度而受到人们的注意。

Channel state information ( CSI ) is of great importance to wireless communications . Due to its virtue of not taking any extra signal spectral and having high accuracy , superimposed-pilot-based channel estimation method has received more attention .

该文通过对R-D成像方法的分析，推导了在R-D成像方法下雷达工作频率，信号带宽与成像角之间的关系，并用计算机仿真进行了验证。

With the analysis of R-D algorithm , the relationship between the frequency of radar , the signal frequency width and the squint angle is deduced . The result is identified by computer simulation .

其内含相加器的小信号带宽为30～40MHz，传输延迟15ns。

The small signal bandwidth for the built in adders is 30 ~ 40 MHz , and the propagation delay is 15 ns .

本文在DRM标准的基础上，结合我国数字AM广播的实现方案，给出了一种在信号带宽只有DRM标准一半的情况下，保证数字AM广播系统的传输效率和传输质量的方法。

In this thesis , a method of improving transmission quality in digital AM broadcasting system is proposed based on the DRM standard and according to the practical instance of our country . How to guarantee the transmission rate and quality are answered in this paper .

超宽带（UWB）雷达是一种新体制雷达，它的信号带宽很宽，具有高距离分辨率（HRR），在雷达探测、成像、精确定位、目标识别等技术中得到广泛应用。

Ultrawideband ( UWB ) radar is a new type of radar system , and it has high range resolution ( HRR ) because of broad bandwidth . Thus , UWB radar has extended application such as passive target identification , precise position 、 target imaging and discrimination .

而经典Colpitts混沌电路由于受晶体管寄生参数的影响，其基本振荡频率与信号带宽最高只能达到所使用晶体管截止频率的十分之一。

In the classic Colpitts chaotic circuit , due to the parasitic effect of the employed transistor , the fundamental oscillation frequency and the signal bandwidth both can only up to be one tenth of the cut-off frequency of the transistor .

最大信号带宽超过12GHz，在12Gb/s速率下得到了高质量的测试眼图，其单端输出电压摆幅达到34V。

Its large signal bandwidth is over 12 GHz . The eye diagrams were measured at bit rate up to 12Gb / s with an output voltage swing of 3 4 Vp p at single end of output .

本文确定了按带通采样定理采样的频率，降低了宽带软件无线电（信号带宽为20MHz）采样后的数据率，提高了信息处理能力。

This paper makes out the sampling frequency of bandpass sampling theorem , reduces the data rate after the sampling of broadband software radio ( signal bandwidth is 20 MHz ) and raises information processing speed .

仿真结果表明，采用该方法设计的HFB在输入信号带宽内所有频率点上都具有小于-104dB的混叠误差，能满足16bit有效位数模数转换系统的需要。

The simulations show that the aliasing error in the whole frequency region is lower than - 104 dB , which satisfies the requirement of analog digital conversion systems with 16 effective bits , 4 bits higher than conventional methods .

心电测试仪的信号带宽设计研究

Design and Research for Signal Bandwidth of Electrocardiograph Testing Meter

采样率逼近信号带宽的采样方法研究

Sampling Method for Approaching Rate of Signal Bandwidth

新算法可实现的最大载波频偏获取范围是整个信号带宽的一半。

The maximum acquisition range can be up to one half of overall signal bandwidth .

讨论了通过信号带宽提高角度脉压分辨率的一般经验准则。

An empirical criterion on improvement of angle resolution by pulse compression is also discussed .

雷达的距离分辨力取决于信号带宽。

The distance resolving power of radar is rest with the bandwidth of radar signal .

对于信号带宽外的干扰可以用时域滤波的方法进行处理。

Interference outside the signal bandwidth can be processed with the method of time-domain filter .

为了满足不同的运行条件，不同频道和不同条件的传输可选用不同的传输模式，每一种传输模式由信号带宽的相关参数和传输效率的相关参数定义。

Each transmission mode is defined by signal bandwidth related parameters and transmission efficiency related parameters .