DECT stands for
A. Digital European Cellular Telex
B. Digitized Emergency Cellular Telephone
C. Digital European Cordless Telephone
D. Digital European Cellular Telephone
The modulation technique used for mobile communication systems during world war II was
A. Amplitude modulation
B. Frequency modulation
C. ASK
D. FSK
----------- introduced Frequency Modulation for mobile communication systems in 1935.
A. Edwin Armstrong
B. Albert Einstein
C. Galileo Galilei
D. David Bohm
The early FM push-to-talk telephone systems were used in
A. Simplex mode
B. Half duplex mode
C. Full duplex mode
D. None of the above
World's first cellular system was developed by
A. Nippon Telephone and Telegraph (NTT)
B. Bellcore and Motorola
C. AT&T Bell Laboratories
D. Qualcomm
A. Simplex systems
B. Half duplex systems
C. Full duplex systems
D. None of the above