文档介绍：1X空口概述
Section 1: IS-95 to CDMA2000 Evolution
Section 2: CDMA 基本原理
Section 3: Physical Layer, Forward/Reverse Channels for CDMA2000-1X
Section 4: Power Control
Section 5: Handoff
第一部分 IS-95 到 CDMA2000 的进化
IS-95
IS-95 is the first CDMA protocol and is Protocol Revision 1*.
IS-95 was first published in July of 1993.
* Protocol Revision Number could be checked in the Layer 3 specification, MOB_P_REV.
IS-95A
IS-95A revision was published in May of 1995.
IS-95A is referred to as Protocol Revision 2.
Mobile Station—Base patibility Standard for Dual-Mode Wideband Spread Spectrum Cellar System.
Frequency band: 800Mhz
Compatible for both analog and CDMA
Limited Circuit data (Max. )
ANSI J-STD-008
Personal Station—Base patibility Requirements for to Ghz CDMA munications Systems (PCS)
ANSI J-STD-008 was published in 1995
Frequency band: 1900Mhz
Mostly same as IS-95A
Rate Set 1 () and Rate Set 2 ()
Limited Circuit data (Max. )
TSB-74
munications Systems Bulletin:
Describes interaction between IS-95A system and PCS system
Support for kbps Data Rate and PCS Interaction for Wideband Spread Spectrum Cellular Systems
Rate Set 2 ()
PCS and Cellular Interaction (1900Mhz and 800Mhz)
IS-95A + TSB-74 are referred as Protocol Revision 3.
IS-95B
IS-95B or TIA/EIA-bines:
IS-95A + TSB-74 + ANSI J-STD-008
into a single document.
IS-95B or TIA/EIA-95 is Protocol Revision 4.
Frequency band: 800Mhz/1900Mhz
Deleted some analog information
Adds technical corrections
Adds new capabilities
Enhanced data Rate by use of Supplemental Code Channel 1~7, Max. Data Rate .
(8 x )
cdmaOne
CDMA systems based on the IS-95 standards and related specifications are referred to as cdmaOne systems.
CDMA2000
New Standards for 3G
An evolution of IS-95A/patible of IS-95A/B
New capabilities for both voice and data
More WALSH Code
Higher Data Rate
, , and even higher.
CDMA2000-1X