What is VSWR? what are waveguides and their types. What is
Aloha? Shannon's information capacity theorem, Sampling
theorem, antenna gain, types of antennae, GSM/CDMA
comparison, modulation techniques, Superheterodyne receiver
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Answer Posted / jeyalakshmi
Voltage standing wave ratio
ALOHA is a old ethernet or networking protocol
sampling theorem:fs> 2fmax
G=4piD/lambda square
modulation tech:AM,FM,PM,QPSK,QAM,OFDM..
superheterodyne Reciever:its freq converter...or a frequency
synthesizer ckt for conversion of frequencies
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