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Chapter 10, TIA/EIA-136 Basics
What is TIA/EIA-136?
TIA/EIAa TIA/EIA-136 Basics
Basic Features of
TIA/EIA-136
These features apply to the TIA/EIA-136 system as specified in the TIA/EIA
system standards.
-Feature Description
Frequency Range Reverse (mobile transmits): 824 to 849 MHz
Forward (base transmits): 869 to 894 MHz
1900 MHz hyperband
recommended Frequency
Range
Reverse: 1850 to 1910 MHz
Forward: 1930 to 1990 MHz
Channel spacing 30 kHz
Time slots per channel 6
Users per voice/traffic channel 3 (full rate)
(double and triple rates are optional)
Modulation Digital:
π
/4 DQPSK, Nyquist filter factor
= 0.35
Analog: FM
Data structure TDMA
Speech coding VSELP: 7950 bps, ACELP 7400 bps
Modulation data rate 24.3 kilo symbols per second
(1 symbol = 2 bits)
TIA/EIA standards TIA/EIA-136
IS-137 for mobile stations
IS-138 for base stations
RX/TX frequency spacing Cellular: 45 MHz, PCS:80.04 MHz