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WC - 2 Evolution of Wireless Communication Systems - Coggle Diagram
WC - 2
Evolution of Wireless Communication Systems
Electromagnetic Sprectrum
1MHz - 1GHz
(100m - 10cm)
AM
HF
FM
UHF (Wireless Internet)
150THz - 250THz
(1um - 100nm)
Optical Fibre
30GHz - 300GHz
(1cm - 1mm)
5G
Wi-Fi
Wi-Fi 0
IEEE 802.11
By Wi-Fi Alliance
To Market in 1997
2.4 GHz
Wi-Fi 1
IEEE 802.11b
Higher Data Rates
Minimize Interference
1999
Wi-Fi 2
IEEE 802.11a
Multi-carrier Modulation Scheme.
(OFDM)
5GHz
1999
Wi-Fi 3
IEEE 802.11g
2.4GHz
54 Mbit/s
OFDM
2003
Wi-Fi 4
2.4Ghz & 5GHz
IEEE 802.11n
600 Mbit/s
Enabled WLANs
2009
Wi-Fi 5
IEEE 802.11ac
2013
3.5Gbit/s
MIMO
Wi-Fi 6
IEEE 802.11ax
9.6 Gbit/s
2021
Wi-Fi 7
IEEE 802.11be
40 Gbit/s
Radio Tech
1G
FDMA for Analog Voice
2G
TDMA & CDMA
Voice + SMS
3G
WCDMA
Voice + SMS + DATA
4G
OFDM
Flexible OFDM
LPWA
low-bandwidth & bit rates
M2M ( For IoT)
Lage Range (Multiple kms)
Example
LoRa
LTE-M
NB-IoT
ZigBee
Bluetooth
4 C's
Capacity
Coverate
Current
Cost
