As for 4G - in case of LTE there's OFDMA and SC-FDMA,
where users get assigned different sets of subcarriers over different time slo
ts (so called physical resource blocks),
hence the multiple access division is done in both frequency and in time.
上面出自於原文稿
但是4G LTE有分為TDD和FDD
所以這段話是指TDD或FDD？還是在述說LTE的本質呢？
小聖狗兒 wrote:
As for 4G - in case of LTE there's OFDMA and SC-FDMA,
where users get assigned different sets of subcarriers over different time slo
ts (so called physical resource blocks),
hence the multiple access division is done in both frequency and in time.
上面出自於原文稿
但是4G LTE有分為TDD和FDD
所以這段話是指TDD或FDD？還是在述說LTE的本質呢？
(恕刪)
你引用的原文已經說明了, frequency, time 兩者都有,
SC-FDMA 用在上行, 每個 子載波 subcarrier 帶寬是15KHz, 子幀 Subframe 長度1ms,
OFDMA 用在下行,OFDMA技術也可以被描述為一種結合頻域和時域的多路存取
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