:1 P/SR/NR/NR/NR bpsOFDM Modulation (1)All subchannels are orthogonally overlappled without bandlimiting ... fixed receiver Power efficiency : ~ 10W, CIR : 5 ~ 10 dB Frequency efficiency : SFN : Single Frequency Network ... filter bank at receiver Spectrally inefficientRFFilterFilterFilter1:N S/PencoderencoderencoderRbpsR/NR