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标题: 关于LTE－TDD transmitter transient period的问题 [查看完整版帖子] [打印本页]

时间: 2011-9-30 16:02

作者: longsteg 标题: 关于LTE－TDD transmitter transient period的问题

transmitter transient period（TTP，不举期）协议上要求不超过17us，对于下行－>上行，可以认为这个TTP是含在了GP里面，虽然GP从道理上说主要是为了避免基站之间的干扰，但同时也确实掩盖了不举期，所以GP＝小区半径×2/光速＋TTP。

上行->下行，这个不举期也是存在的，但从帧结构上看是连续的，为什么？为什么不体现这个不举期？

谢谢！

[ 本帖最后由 longsteg 于 2011-9-30 16:11 编辑 ]

时间: 2011-10-10 10:55

作者: longsteg

没有人能说一下吗

时间: 2011-10-10 13:48

作者: jeffyko

Transient period of Rx->Tx at eNB side exists and also contained in GP.
Although I can not fully understand yet, I can show you the paragraph from book <LTE from theory to practice>, [Section 23.4.1, Page 567] reads:

Overall, the total guard time TG at a TDD eNodeB per uplink-downlink cycle is equal
to the sum of TG1 and TG2, as given by Equation (23.11). In the LTE specifications this
is represented by a single guard period amalgamating both parts (with the uplink subframe
timing advanced by an amount TG2 at the eNodeB with respect to the downlink timing). This
is only a matter of representation, however, and the end result is essentially identical to the
presence of the two separate guard periods:

[ 本帖最后由 jeffyko 于 2011-10-10 13:49 编辑 ]

时间: 2011-10-10 16:30

作者: longsteg

问题已解决。:)

[ 本帖最后由 longsteg 于 2011-11-24 11:35 编辑 ]

时间: 2011-10-11 23:27

作者: xiedanshine

研发？

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