User's Manual Chapter 13
Table Of Contents
Base FCC Regulatory Test Report
7-98
AT&T Wireless Services
FCC Type Acceptance Application
10991 Rev. 1.0 7/6/99
7.2.3 PWAN Airlink Resource Allocation
The 16 x 8 FTR matrix described in the previous section provides a
total of 128 potential resources for the airlink. However, airlink control
overhead and the specialized needs of packet-switched data services
consume a fixed portion of these resources. Figure 7.13— depicts the
allocation of subband resources in the FTR matrix by function.
Figure 7.13—PWAN Airlink Resource Matrix
Subband Size 1 MHz
Total Number of OFDM Tones 320 per subband
Number of Energized OFDM
Tones
305 per subband
Tone Spacing 3.125 KHz
Frequency Slot (FDMA slot)
Size
56.25 KHz (18 adjacent
tones)
Total Number of Frequency-
Time Resources (FTRs)
128 per subband
Tone Modulation Formats
Supported
QPSK, 16-QAM
PWAN OFDM Parameter Value
Frequency-Slots
Time-Slots
TDMA Frame
NAC
NAC-Slot
NAC
n
1.0 M Hz Subband
fs
0
fs
1
fs
2
fs
3
fs
4
fs
5
fs
6
fs
7
fs
8
fs
9
fs
10
fs
11
fs
12
fs
13
fs
14
fs
15
TrafficTraffic
ts
0
ts
1
ts
2
ts
3
ts
4
ts
5
ts
6
ts
7
Voice-Slots
Data-Slots
ds
í
ds
ì
ds
ë
ds
ê
ds
é
ds
è
ds
ç
ds
æ
3 ms