A.確保無線發(fā)送的可靠, B.靈活地適配業(yè)務活動性及信道的多變性, C.實現(xiàn)差異化的QoS服務, D.增加下行數(shù)據(jù)傳輸速率.
A.單載波頻分多址(SC-FDMA., B.OFDMA, C.QAM, D.8PSK.
A.OFDMA, B.SC-FDMA, C.QAM, D.QPSK.