CDMA 120 – cdmaOne and CDMA2000 Concepts and Terminology phần 8 pps

[...].. .CDMA 120 – cdmaOne and CDMA2 000 Concepts and Terminology 80 -13321-1 X11 Section 8: CDMA2 000 Overview CDMA2 000 Overview cdma university CDMA 120 Section 8- 1 3G CDMA 1x FDD-MC 3x FDD-DS TDD CDMA2 000 WCDMA (UMTS) UTRA TDD + TD-SCDMA 1.2 288 and 3. 686 4 Mcps 3 .84 Mcps 3 .84 and 1. 28 Mcps 1xEV-DO © 2002 QUALCOMM Incorporated 8- 1 CDMA 120 – cdmaOne and CDMA2 000 Concepts and Terminology 80 -13321-1... frame and slot structure are the same as W -CDMA However, in TDD mode each slot can be individually allocated either the uplink or the downlink © 2002 QUALCOMM Incorporated 8- 4 CDMA 120 – cdmaOne and CDMA2 000 Concepts and Terminology 80 -13321-1 X11 Section 8: CDMA2 000 Overview CDMA2 000 cdma university z Reuses and builds on the full complement of existing CDMA air interface and network standards z CDMA 120. .. Section 8: CDMA2 000 Overview 3rd Generation Standards cdma university CDMA 120 Section 8- 4 3G CDMA 1x FDD-MC 3x FDD-DS TDD CDMA2 000 WCDMA (UMTS) UTRA TDD + TD-SCDMA 1.2 288 and 3. 686 4 Mcps 3 .84 Mcps 3 .84 and 1. 28 Mcps 1xEV-DO Third Generation Standards After considering several proposed standards, the ITU approved three, all based on CDMA: z CDMA2 000/FDD-MC — CDMA2 000 using Frequency Division Duplexing-Multicarrier... enables the Reverse link to be coherently demodulated © 2002 QUALCOMM Incorporated 8- 6 CDMA 120 – cdmaOne and CDMA2 000 Concepts and Terminology 80 -13321-1 X11 Section 8: CDMA2 000 Overview CDMA2 000 Physical Layer cdma university CDMA 120 Section 8- 7 New Concepts in the CDMA2 000 Physical Layer z Spreading Rate 1 (1x) and Spreading Rate 3 (3x) z Logical Channels z Radio Configurations z Many new Physical... Pilot Channel CDMA2 000 Physical Layer Several new concepts have been introduced for the CDMA2 000 Physical Layer These new concepts are covered in more detail in the following pages © 2002 QUALCOMM Incorporated 8- 7 CDMA 120 – cdmaOne and CDMA2 000 Concepts and Terminology 80 -13321-1 X11 Section 8: CDMA2 000 Overview 1.25 MHz Forward Link 1MHz 2 MHz 3 MHz 4 MHz 5 MHz Reverse Link 0 Section 8- 8 1.25 MHz Forward... rate of 1.2 288 Mcps z Spreading Rate 3 — also called “3x” or MC (Multi-Carrier) – Forward Channels use three direct-sequence spread carriers each with a chip rate of 1.2 288 Mcps – Reverse Channels use a single direct-sequence spread carrier with a chip rate of 3. 686 4 Mcps © 2002 QUALCOMM Incorporated 8- 8 CDMA 120 – cdmaOne and CDMA2 000 Concepts and Terminology 80 -13321-1 X11 Section 8: CDMA2 000 Overview... 120 – cdmaOne and CDMA2 000 Concepts and Terminology 80 -13321-1 X11 Section 8: CDMA2 000 Overview CDMA2 000 1x Voice Capacity cdma university z CDMA2 000 has twice the Forward link capacity of IS-95 for voice services with 8 kbps codecs z CDMA 120 Section 8- 6 How is this achieved? – Fast Forward link power control – Lower code rates (rate 1/4 code can be used) – Transmit diversity z CDMA2 000 nearly doubles... information (traffic) © 2002 QUALCOMM Incorporated 8- 10 CDMA 120 – cdmaOne and CDMA2 000 Concepts and Terminology 80 -13321-1 X11 Section 8: CDMA2 000 Overview CDMA2 000 Physical Channel Naming cdma university Channel Name F/R-PICH F-APICH F-TDPICH F-ATDPICH F-SYNCH F-PCH F-QPCH F-BCCH F-CACH F-CPCCH F/R-CCCH R-ACH R-EACH F/R-FCH F/R-DCCH F/R-SCH F/R-SCCH CDMA 120 Section 8- 11 Physical Channel Forward/Reverse Pilot... Sync Channel is sometimes named F-SYNC and other times F-SYNCH The Broadcast Control Channel may be named F-BCCH or F-BCH Sometimes the F and R direction indicators are dropped if the rest of the channel name is unique © 2002 QUALCOMM Incorporated 8- 11 CDMA 120 – cdmaOne and CDMA2 000 Concepts and Terminology 80 -13321-1 X11 Section 8: CDMA2 000 Overview cdma university CDMA2 000 Logical to Physical Channel... CDMA2 000 versus TIA/EIA-95 z List the characteristics that define a Radio Configuration z Describe the difference between Logical and Physical Channels z Name the two types of transmit diversity used in CDMA2 000 z Name the CDMA2 000 channels that are backward-compatible to IS-95 z Name some major differences among 1xEV-DO, CDMA2 000, and IS-95 © 2002 QUALCOMM Incorporated 8- 2 CDMA 120 – cdmaOne and CDMA2 000