A2 Applied Science: Working Waves G635 CommunicationsMindmap
A very Basic mindmap about general communications in A2 Applied Science.
REF:http://en.wikipedia.org/wiki/3G
- Created by: James
- Created on: 08-01-13 14:08
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- Communications
- TDMA
- Time Division Multiple Access
- FDMA
- Frequency Division Multiple Access
- CDMA
- Code Division Multiple Access
- FM
- Frequency Modualtion
- AM
- Amplitude Modulation
- Pulse Code Modulation
- Pulse Code Modulation (PCM) is the digital representation of an analog signal
- Microwaves
- Used in mobile phones
- 1G
- Works on FDMA.The main difference between 1G and 2G is that the radio signals 1G use are analog, wheras the radio signals used by 2G are digital.
- 2G
- Most commonly used generation today.Works on TDMA
- 3G
- Multiple bands of radio waves that enable 3G to be faster than 2G and 1G phones.
- TDMA
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