[samwel]

What are different types of modulation used in Transmission and their comparisson

[john]

hi
there is qspk, 8qspk,4qspk

others can correct me

[Prateek]

3 Basic Types of modulation are :
1. FSK – Frequency Shift Keying.
2. ASK – Amplitude -,,-
3. PSK – Phase -,,-

All the modulation such as QPSK, GMSK etc are derieved from these basic types.

GSM uses GMSK(Gaussian Minimum Shift Keying) and WCDMA-FDD used QPSK (Quadrature Phase Shift Keying)

[Vanderlay]

Also:
EDGE – 8PSK
WCDMA HSDPA – 16 QAM (Quadrature amplitude modulation)

[samwel]

How can one distinguish for each other in comparisson and how are they generated.( Literature)

[Author]

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