共查询到20条相似文献,搜索用时 31 毫秒
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泰克公司9月5日推出了泰克RSA6100A系列实时频谱分析仪,泰克公司称,其领先的实时性能及独具特色的DPX波形成像处理技术可满足数字RF的测量需求。与速度最快的扫频分析仪和矢量信号分析仪(VSA)相比,其频谱测量速率提高了近1000倍,实现了实时的RF测量。 相似文献
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数字RF应用的迅速扩大,推动了包括移动通信和频谱管理在内的大量来自应用上的测量需求,它们超出了扫频分析仪和矢量信号分析仪的能力范围。数字RF信号承载着复杂的调制,它在不同时点之间变化、跳频,短时间内达到尖峰,然后消失。这些瞬态信号和随时间变化的传输技术帮助RF设备避免干扰,使峰值 相似文献
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The system of Integrated-Optics Acousto-Optic RF Spectrum Analyzer (IOAOSA)consists of a laser diode, an Acousto-Optic (A-O) modulator, geodesic lenses and CCD detectorarray. The optical signal projected on the CCD array is converted into electrical signal andprocessed by the signal processing center which consists of a TMS 32010 system and an IBM-PC.The TMS 32010 with very high speed is used in a microcomputer system. A cycle sample methodis adopted to collect the data of the CCD video signal, sampling one per 40-point. After theprocessing, the frequency bandwidth, the resolution and the dynamic range of the system aremeasured to be 100 MHz, 8 MHz and 20 dB, respectively. 相似文献
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泰克公司(Tektronix)日前推出全新系列实时频谱分析仪,为测量当前复杂的RF信号提供了第一个完整的测量套件. 相似文献
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V. L. Kozlov 《Radioelectronics and Communications Systems》2009,52(5):261-264
It is shown, that for spectrum analyzer noise immunity increase, during processing of optical Doppler location signal with unknown frequency, random appearance time and low signal to noise ratio it is advisable to use methods of false alarm probability decrease, where decision about useful signal presence is made according to two pulses appearance at the matched filter output. These pulses have the same delay times with regard to signal analysis beginning time. This methodology application for signal detection allows to decrease a false alarm probability with regard to one period of analysis in case of the same values of threshold. 相似文献
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高速(≥100 Mbit/s)超宽带一脉冲位置调制(UWB-PPM)信号传输是实现超宽带(UWB)室内通信的关键技术.文章结合UWB二元脉冲位置调制(PPM)的信号特征,采用多个并行积分器捕获簇脉冲能量取得快速同步,同时完成PPM的射频同步检测.系统传输试验与系统仿真表明,这种检测方式在室内多径信道下有良好的抗码间干扰能力. 相似文献
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为进一步提高扩频测控系统的捕获速度,研究了借助辅助序列估计伪码相位的方法,分析了该估计算法的精度。针对该算法在高动态条件下估计偏差较大引起捕获概率骤降的问题,提出引入最大似然频偏估计修正相干载波的方法,显著提高捕获概率。设计了基于码相位估计和载波频率估计的快速捕获算法,仿真结果表明,该算法在载噪比较好的情况下可以有效完成捕获。为提高算法在较低载噪比时捕获的可靠性,提出将估计值作为部分匹配滤波辅助快速傅里叶变换( PMF-FFT )初值的综合捕获方法,与传统捕获方法相比,平均捕获时间显著降低,且并没有带来硬件复杂度的提高,具有一定的理论意义和工程应用价值。 相似文献
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《Electron Device Letters, IEEE》1985,6(6):261-263
Spectral analysis over an instantaneous bandwidth of 2.4 GHz has been demonstrated utilizing superconductive dispersive delay lines in a chirp-transform configuration. Two-tone resolution of 43 MHz and ±1.2-dB amplitude uniformity were achieved. 相似文献