80
CSMA
43 IEEE802.11g 1 7
1
IEEE802.11g 6 Mbps
QualNet EXata NS3
Scenargie
44 IEEE802.11g 2
2
iPerf 2
44 CSMA
82 CSMA
45 46 47
2 2
45 CSMA
46 CSMA
47 CSMA CSMA
3 1
100%
2 CSMA
2 2
50%
2 CSMA
3
S
1 3
84
IEEE802.11 48
[MHz] [dB]
48 22MHz 4ch
20dB
22MHz 4ch
D/U CSMA
47 1ch 3ch
48 IEEE802.11
5.5 5.4
Ping 5.5.1
40
FPGA FFT
49
VNC
FFT Waterfall STA1
Windows PC FFT Spectrum
STA1
Windows PC
Scenario Generator
STA2 Console
Wireless Node STA2 STA3 Console
Wireless Node STA3 STA4 Console
Wireless Node STA4
Wireless Node STA1
86
49
5.5.2
IEEE802.11g Adhoc Mode 6Mbps OFDM Rate
0dBm
5GHz
STA1 3:ch1 STA4:ch7
0dB
STA1: STA2 STA4:
20dB
STA2 4
STA2 STA3 STA1 Ping Ping
STA4 Ping
Ping STA1
RTSP STA2 STA3
( 50 )
50
STA2 STA3 STA1 Ping RTT 1.2mSec
STA2 STA3 STA1 Ping
88
STA4 STA2 STA3 STA1
STA2 STA3 STA1 RTT
FFT
RTT
5.6 2.1
3 4
5.6.1
2.1.1
2.1.1
5.4 5.5 StarBed
FFT
90 iPerf
IEEE802.11
OFDM BPSK QPSK QAM
5.4
2.1.1
5.1.2
5.4 5.5
2.1.1
3.1.3
5.1.3 Cost Hata
5.6.2 2.1.2
m 3m
SDR FPGA
1.76 5n
1.76
0m
5n 3x10
8m
1.5m 3m
5.6.3 2.1.3
5.3
LAN
5.4 5.5
5.6.4
92 5.3.3
FPGA FPGA
7
7
8
94 8
PC
PC + Linux
FPGA
SDR FPGA FPGA Cost Hata
FPGA
ITU-R M.1225
FPGA
2uSec 1.76uSec
0m 3m
10nSec 5nSec
100
112
6
96 LAN
FILS(Fast Initial Link Setup) IEEE802.11ai
2013 Wi-FILS 50
IEEE802.11 LTE LAN 5G
2014 5 IEEE802.11 IEEE802.11
PER(Packet Error Rate)
98
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