9

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-7833. 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.

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

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

Waveform Quality Factor and Frequency Accuracy

>0.944

SR1, Band Class 0(Cellular band)

SR1, Band Class1(PCS band)

885 kHz to 1.98 MHz

1.25 MHz to 1.98 MHz

Less stringent of -42 dBc/30 kHz

Less stringent of -42 dBc/30 kHz

or -54 dBm/1.23 MHz

or -54 dBm/1.23 MHz

1.98 MHz to 3.125 MHz

1.98 MHz to 2.25 MHz

Less stringent of -54 dBc/30 kHz

Less stringent of -50 dBc/30 kHz

or -54 dBm/1.23 MHz

or -54 dBm/1.23 MHz

3.125 MHz to 5.625 MHz

2.25 MHz to 6.25 MHz

-13 dBm/100 kHz

-13 dBm/1 MHz

Spurious Emission at

Maximum RF output

power offset frequency

within the range

Table 1. Transmitter Specification in Reverse Link.

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