# A video transmission system transmits 625 picture frames per second. Each frame consists of a 400 X 400 pixel grid with 64 intensity levels per pixel. The date rate of the system is

1.  16 Mbps

2.  100 Mbps

3.  600 Mbps

4.  6.4 Gbps

4

600 Mbps

Explanation :
No Explanation available for this question

# Let U and V be two independent zero mean Gaussian random variables of variances (1/4) and (1/9) respectively. The probility p(3V ≥ 2U) is

1.   4/9

2.  ½

3.  2/3

4.  5/9

4

½

Explanation :
No Explanation available for this question

# Let U and V be two independent and identified distributed random variables such that p(U=+1)=P(U=-1)=1/2. The entropy H(U+V) in bits is

1.   ¾

2.  1

3.  3/2

4.  lod23

4

3/2

Explanation :
No Explanation available for this question

# A band limited signal is sampled at the Nyquist rate. The signal can be recovered by passing the samples through

1.  An RC filter

2.  An envelope detector

3.  A PLL

4.  An ideal low-pass filter with the appropriate bandwidth

4

An ideal low-pass filter with the appropriate bandwidth

Explanation :
No Explanation available for this question

# The bit rate of a digital communication system is R kbits/s. The modulation used is 32-QAM. The minimum bandwidth required for ISI free transmission is

1.   R/10 Hz

2.  R/10 kHz

3.  R/5 Hz

4.  R/5 kHz

4

R/10 kHz

Explanation :
No Explanation available for this question

# A 4 GHz carrier is DSB-SC modulated by a pass message signal with maximum frequency of 2 MHz. The resultant signal is to be ideally sampled. The minimum frequency of the sampling impulse train should be

1.   4 MHz

2.  8 MHz

3.  8 GHz

4.  8.00 GHz

4

8 MHz

Explanation :
No Explanation available for this question

# In a BPSK signal defector, the local oscillator has a fixed phase error of 200. This phase error deteriorates the SNR at the output by a factor of

1.  cos 200

2.  cos2 200

3.  cos 700

4.  cos2 700

4

cos2 200

Explanation :
No Explanation available for this question

# The Nyquist sampling interval, for the signal sinc(700t)+sinc (500t) is

1.   1/350 sec

2.  π/350 sec

3.  1/700 sec

4.  π/175 sec

4

1/700 sec

Explanation :
No Explanation available for this question

# The Nyquist sampling rate for the signal s(t)=sin(500πt)/πt x sin(700πt)/πt is given by

1.   400 Hz

2.  600 Hz

3.  1200 Hz

4.  1400 Hz

4

1200 Hz

Explanation :
No Explanation available for this question

# The value of the parameter α(in V-1) is

1.  1010

2.   107

3.  1.414 x 10-10

4.  2 x 10-20

4