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OFDM 하향 링크(Down Link) 자원 할당 본문
Resource Element 12개 = Resource Block 1개
LTE sub-carrier bandwidth = 15Khz
LTE total bandwidth = 30Mhz (but, use only 20Mhz)
# of total sub-carrier = 2048
# of used sub-carrier = 1320
15Khz x 12 x 110 = 15Khz x 1320 = 19.8Mhz = about 20Mhz
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