Amplitude shift keying

Uni-polar PAM

Amplitude shift keying & Uni-polar PAM

None of the mentioned

In phase

Quadrature

In phase & Quadrature

None of the mentioned

BPSK and QPSK

BPSK and ASK

BPSK and PAM

BPSK and QAM

Digital microwave relay

Dial up modem

Digital microwave relay & Dial up modem

None of the mentioned

Switching

Keying

Switching or keying

None of the mentioned

Is a non linear filter

Produces maximum output SNR

All of the mentioned

None of the mentioned

average energy symbol/log2 M

average energy symbol * log2 M

log2 M/ Average energy symbol

none of the mentioned

AMI

Differential code

Uni polar RZ format

Manchester format

a coherent carrier is not required to be generated at the receiver

for a given energy per bit, the probability of error is less

the 1800 phase shifts of the carrier are unimportant

more protection is provided against impulse noise

QPSK

FSK

ASK

PSK

BPSK

Differential encoding followed by BPSK

Differential Encoding

None

$Pe=\frac{1}{2}erfc\left(\sqrt{\frac{Eb}{2No}}\right)$

$Pe=\frac{1}{2}erfc\left(\frac{1}{2}\sqrt{\frac{Eb}{N0}}\right)$

$Pe=\frac{1}{2}erfc\left(\sqrt{\frac{Eb}{N0}}\right)$

None

$\pi$

$\frac{\pi}{2}$

$\frac{\pi}{4}$

$2\pi$

ASK

BPSK

FSK

None