lmds無線接入技術(shù)ppt課件-文庫(kù)吧資料
2025-05-13 22:06本頁(yè)面
【正文】 s ATM cell 2 53 bytes ATM cell 3 53 bytes ATM cell 4 (part) 27 bytes CTRL 1 1 byte ATM cell 4 (cont) 26 bytes ATM cell 5 53 bytes ATM cell 6 53 bytes ATM cell 7 53 bytes CTRL 2 1 byte Packet 0 Packet 1 Packet 0 Packet 1 PAYLOAD 187 byte 16 Example Downstream/Upstream Framing Relationship (ATM Case) QPSK Modulation Do w n s tr e a m U p s tr e a mF r a m e P e r i od5 . 8 1 9 m s 5 . 8 1 9 m sA T M R a t e5 3 . 0 4 3 M b p s 1 . 7 4 9 M b p sC ha nn e l B i t R a t e6 6 . 6 6 6 7 M b p s 2 . 2 3 4 6 M b p sC ha nn e l B a n dwidt h4 0 M Hz 1 . 4 5 8 3 M HzA v a i l a bl eB a n dwidt h8 5 0 M Hz 3 0 0 M HzN um be rof C h a nn e l s2 1 . 2 5 2 0 5 . 7 117 圖 2 基于 BWA系統(tǒng)的 MAC
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