Spread Spectrum Modulation Techniques PPTspead spectrum modulation technique
复习提纲Chapter 7 Spread-Spectrum Modulation讲解学习.ppt,* * 期末考试 考试时间:2013年6月26日下午 答疑时间: 另行通知 期末考试 *考试形式:闭卷、英文试卷、英文答题 *试题类型:判断题 填空题 综合题 *成绩构成:平时成绩10%、期末考试90% *平时成绩:出勤、
SpreadSpectrum(扩频技术).ppt,Spread Spectrum(扩频技术) 《无线通信与网络》第七章 Spread Spectrum Input is fed into a channel encoder (信道编码器) Produces analog signal with narrow bandwidth Signal is further modulated using sequence of digits (数字
Unit_7_spread_spectrum_modulation[1]Unit7SpreadSpectrumModulation 7.1Text ••7.1.1SpreadSpectrumSignalsforDigitalCommunicationSpreadspectrumsignalsusedforthetransmissionofdigitalinformationaredistinguishedbythecharacteristicthattheirbandwidthismuchgreaterthantheinformationrateinbits/s.Thatis,thebandwidthexpansion...
Chapter 7 Spread-Spectrum Modulation
Spread Spectrum.pptSpreadSpectrumIntroductiontoSpreadSpectrumProblemssuchascapacitylimits,propagationeffects,urwithwirelesssystemsSpreadspectrummodulationspreadsoutthemodulatedsignalbandwidthsoitismuchgreaterthanthemessagebandwidthIndependentcodespreadssignalattransmitteranddespreadssignalatreceiverMultiplexingin4dimensionsspace(si)...
Spread Spectrum Modulation 下载积分:3000 内容提示: Chapter 7Spread Spectrum Modulation7.1 IntroductionInthetechniqueofspreadspectrum,thefrequencyspectrumofadata-signal(shadedin Fig. 7.1) is spread (non-shaded) using a code uncorrelated with that signal. As aresult the bandwidth occupancy is much ...
spreadspectrummodulation 系统标签: spreadspectrummodulationsequencespreadingsignal Chapter7 SpreadSpectrumModulation 7.1Introduction Inthetechniqueofspreadspectrum,thefrequencyspectrumofadata-signal(shaded inFig.7.1)isspread(non-shaded)usingacodeuncorrelatedwiththatsignal.Asa resultthebandwidthoccupancyismuchhigherthanreq...
A spread spectrum modulation system uses an input signal and a spreading signal for modulating the input signal. The spreading signal includes a plurality of component signals spaced apart substantially equally in frequency and with substantially equal amplitudes. Each component signal is phase encoded ...
Definition of Spread Spectrum (SS) A transmission technique in which a pseudo-noise code, independant of the information data, is employed as a modulation waveform to “ spread” the signal energy over a bandwidth much greater than the signal information bandwidth. At the receiver the signal is...