1.
The modulation technique used for mobile communication systems during world war II was

2.
----------- introduced Frequency Modulation for mobile communication systems in 1935.

3.
The early FM push-to-talk telephone systems were used in

4.
DECT stands for

5.
World's first cellular system was developed by

6.
Paging systems were based on

7.
Paging systems could be used to

8.
Garage door opener is a

9.
Carrier frequency of a TV remote control is in the range

10.
Half duplex system for communication has