cdma 2000 1xRTT Characterization
System Description
standard, has a chip rate of
1.2288Mchip/s. However, in
1xRTT, the reverse link transmits and the reverse dedicated
channels such as the reverse
supplemental channels (R-SCHs)
CDMA2000 is the TIA’s standard
for third generation (3G) technol-
ogy and is an evolution of the IS-
95 CDMA format. CDMA2000
includes 1X RTT in the single-
carrier mode and 3X RTT in the
multi-carrier mode. This paper
describes the CDMA2000 1X RTT
approach and its performance
with Agilent 4x4 CDMA PAs,
ACPM-7833. CDMA2000 1X RTT,
being an extension of the IS-95
more than one code channel to
accommodate the high data
rates. The minimum configura-
tion consists of a reverse pilot
(R-Pilot) channel for synchro-
nous detection by the Base
Transceiver System (BTS) and a
reverse fundamental channel
(R-FCH) for voice. Additional
channel (R-DCCH) are used to
send data or signaling informa-
tion. Channels can exist at
different rates and power levels.
Table 1 shows the transmitter
specification in CDMA2000
reverse link.
Table 1. Transmitter Specification in Reverse Link.
Specification
Spread Rate1
ERP at Maximum Output Power
Lower limit +23 dBm
Upper limit +30 dBm
Minimum Controlled Output Power
-50 dBm/1.23 MHz
>0.944
Waveform Quality Factor and Frequency Accuracy
SR1, Band Class 0(Cellular band)
SR1, Band Class1(PCS band)
Spurious Emission at
885 kHz to 1.98 MHz
Less stringent of -42 dBc/30 kHz
or -54 dBm/1.23 MHz
1.25 MHz to 1.98 MHz
Less stringent of -42 dBc/30 kHz
or -54 dBm/1.23 MHz
Maximum RF output
power offset frequency
within the range
1.98 MHz to 3.125 MHz
1.98 MHz to 2.25 MHz
Less stringent of -54 dBc/30 kHz
or -54 dBm/1.23 MHz
Less stringent of -50 dBc/30 kHz
or -54 dBm/1.23 MHz
3.125 MHz to 5.625 MHz
-13 dBm/100 kHz
2.25 MHz to 6.25 MHz
-13 dBm/1 MHz
Typical channel configurations below are based on the transmitter test condition in the reverse link.
1) “Basic” Voice only configuration
3) Voice and Control configuration
– R-PICH @ -5.3 dB
–
–
R-PICH @ -5.3 dB
R-FCH @ -1.5 dB 9.6 kbps
– R-FCH @ -3.85 dB 9.6 kbps
– R-DCCH @ -3.85 dB 9.6 kbps
4) Control channel only configuration
– R-PICH @ -5.3 dB
2) Voice and Data configuration
–
–
–
R-PICH @ -5.3 dB
R-FCH @ -4.54 dB 9.6 kbps
R-SCH1 @ -4.54 dB 9.6 kbps
– R-DCCH @ -1.5 dB 9.6 kbps
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