cdma 2000 1xRTT Characterization
System Description
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-7813. CDMA2000 1X RTT,
being an extension of the IS-95
standard, has a chip rate of
1.2288Mchip/s. However, in
1xRTT, the reverse link transmits
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
channels such as the reverse
supplemental channels (R-SCHs)
and the reverse dedicated
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
ERP at Maximum
Output Power
Minimum Controlled Output Power
Waveform Quality Factor and Frequency Accuracy
Spurious Emission at
Maximum RF output
power offset frequency
within the range
SR1, Band Class 0(Cellular band)
885 kHz to 1.98 MHz
Less stringent of -42 dBc/30 kHz
or -54 dBm/1.23 MHz
1.98 MHz to 3.125 MHz
Less stringent of -54 dBc/30 kHz
or -54 dBm/1.23 MHz
3.125 MHz to 5.625 MHz
-13 dBm/100 kHz
Spread Rate1
Lower limit +23 dBm
Upper limit +30 dBm
-50 dBm/1.23 MHz
>0.944
SR1, Band Class1(PCS band)
1.25 MHz to 1.98 MHz
Less stringent of -42 dBc/30 kHz
or -54 dBm/1.23 MHz
1.98 MHz to 2.25 MHz
Less stringent of -50 dBc/30 kHz
or -54 dBm/1.23 MHz
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
– R-PICH @ -5.3 dB
– R-FCH @ -1.5 dB 9.6 kbps
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
3) Voice and Control configuration
– R-PICH @ -5.3 dB
– 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
– R-DCCH @ -1.5 dB 9.6 kbps
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