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SXsimplex(transmission)单工传输FDXfull-duplex全双工HDXhalf-duplex半双工AMamplitudemodulation调幅FMfrequencymodulation调频PMphasemodulation调相FDMfrequency-divisionmultiplexing频分复用TDMtime-divisionmultiplexing时分复用MAmultipleaccess多路存取、多路访问CWcontinuous-wave连续波CDMAcode-divisionmultipleaccess码分复用PAMpulseamplitudemodulation脉幅调制PCMpulse-codemodulation脉码调制PPMpulsepositionmodulation脉位调制PWMpulsewidthmodulation脉宽调制PDFprobabilitydensityfunction概率密度函数AWGNadditivewhiteGaussiannoise加性高斯白噪声SNRsignalnoiseratio信噪比WSSwide-sensestationary广义频稳RZreturn-to-zero归零NRZnonreturn-to-zero不归零ISIinter-symbolinterference码间串扰DM(M)deltamodulation增量调制FECforwarderrorcorrection前向纠错ARQautomaticrepeatrequest自动请求重传ASK(OOK)amplitude-shiftkeying（on-offkeying）幅移键控FSKfrequency-shiftkeying频移键控MSKminimum-shiftkeying最小频移键控PSKphase-shiftkeying相移键控DPSKdifferentialphase-shiftkeying相对移相