[问答题] 何谓展频(Spread Spectrum)?
[问答题] 何谓跳频(Frequency-Hopping Spread Spectrum)?
[单选题]关于维纳频谱的叙述,错误的是A.维纳频谱即Wiener spectrum,(WS)B.△D(x)的自相关函数的付氏变换为WSC.用WS分析形成X线照片斑点的原因D.维纳频谱可以确定不同频率的RMSE.维纳频谱也称量子检出效率
[多选题] 主要的扩展频谱技术包括()。A . 直接序列扩频(Direct Sequence Spread Specm,DSSS)B . 跳频扩频(Frequency Hopping Spread spectunu FHSS)C . 跳时(Time Hopping,TH)D . 线性调频(Chirp )
[多选题]主要的扩展频谱技术包括()。A.直接序列扩频(DirectSequenceSpreadSpectrum,DSSS)B.跳频扩频(FrequencyHo
[多选题] 在WLAN中,扩展频谱技术具体包括()。A .DSSSB .FHSSC .OFDMD . D.CDMA
[单选题]A bond's nominal spread, zero-volatility spread, and option-adjusted spread
[单选题]Which of the following statements about option-adjusted spread and nominal
[单选题]Bond A has an embedded option, a nominal yield spread to Treasuries of 6%,
[单选题]All else equal, the difference between the nominal spread and the Z-spread