Digital Communication - Study Mode
[#111] A message signal with its amplitude uniformly distributed between -2 V and +2 V is transmitted by a 8-bit binary PCM system. The (SNR) q would be
Correct Answer
(B) 49.8 dB
[#112] The bit error probability for GMSK is given by
Correct Answer
(B) $${P_e} = Qleft{ {sqrt {frac{{2v{E_b}}}{{{N_0}}}} }
ight}$$
[#113] A carrier is modulated by a digital bit stream having one of the possible phases of 0°, 90°, 180° and 270°. Then the modulation is termed as
Correct Answer
(B) QPSK
[#114] The different access methods which permit many satellite users to operate in parallel through a single transponder without interfering with each other are 1. Frequency Division Multiple Access (FDMA) 2. Time Division Multiple Access (TDMA) 3. Code Division Multiple Access (CDMA) Which of the above are correct?
Correct Answer
(B) 1 and 3 only
[#115] The signal to noise ratio in telemetry should be
Correct Answer
(D) 60 dB