What is the order of typical values of rms delay spread in outdoor mobile radio channels?

A

Microseconds

B

Nanoseconds

C

Seconds

D

Minutes

What is the order of typical values of rms delay spread in outdoor mobile radio channels? Correct Answer Microseconds

Typical values of rms delay spread are on the order of microseconds in outdoor mobile radio channels. For indoor mobile radio channels, they are of the order of nanoseconds.

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Related MCQ's

A TDMA system uses 25 MHz for the forward link, which is broken into radio channels of 200 kHz. If 8 speech channels are supported on a single radio channel, how many simultaneous users can be accommodated?

A

25

B

200

C

1600

D

1000

A mobile was dropped from a balcony if the mass of the mobile phone is 0.5kg and the mobile phone was dropped from a height of 100m, g = 10m/s². So what is the potential energy of mobile phone?

A

5000 J

B

5 J

C

50 J

D

500 J

A heat pump is used to meet the heating requirements of a house and maintain it at 20°C. On a day when the outdoor air temperature drops to 2°C, the house is estimated to lose heat at a rate of 80,000 kJ/h. If the heat pump under these conditions has a COP of 2.5, determine the rate at which heat is absorbed from the cold outdoor air.

A

32000 kJ/h

B

48000 kJ/h

C

54000 kJ/h

D

72000 kJ/h

A transformer has a primary voltage of 120 V rms and a secondary voltage of 25 V rms. If the secondary current is 1A rms, what is the primary current?

A

7.8 mA

B

208 mA

C

200 mA

D

300 mA

E

None of the above

In a parallel RL circuit, there are 3 A rms in the resistive branch and 3 A rms in the inductive branch. The total rms current is

A

6 A

B

424 mA

C

4.24 A

D

42.4 A

In a series RC circuit, 12 V(rms) is measured across the resistor and 15 V(rms) is measured across the capacitor. The rms source voltage is

A

3 V

B

27 V

C

19.2 V

D

1.9 V

Directions : In each of the following questions a statement is given, followed by two conclusions. Give answer :

Statement : Of all the radio sets manufactured in India, the 'X' brand has the largest sale.

Assumptions :
I. The sale of all the radio sets manufactured in India is known.
II. The manufacturing of no other radio set in India is as large as 'X' brand radio.

A

Only assumption I is implicit

B

Only assumption II is implicit

C

Either I or II is implicit

D

Neither I nor II is implicit

E

Both I and II are implicit

A spectrum of 30 MHz is allocated to a cellular system which uses two 25 KHz simplex channels to provide full duplex voice channels. What is the number of channels available per cell for 4 cell reuse factor?

A

150 channels

B

600 channels

C

50 channels

D

85 channels

P, Q and R are channels which discharge solutions A,B and C respectively in a tank. When the tank is empty and all the three channels are opened what is the proportion of the solution C in the tank after 3 minutes, if the channels P, Q and R can fill the tank from empty to full in 30 minutes and 20 minutes and 10 minutes respectively when they are opened one at a time.

A

6\/11

B

5\/11

C

5

D

6

Consider the following statements and choose the correct answer:
1. Every species of animal and plant tends to produce more offspring than can survive within the normal range of the organism
2. There is a strong population pressure tending to force the individuals of each species to spread out and become established in new territories
3. The spread of a species is prevented by highways, such as land connections between continents
4. The spread of species is facilitated by geographical barriers, such as oceans, mountains, deserts and large rivers

A

Only 1, 2 and 3 are true

B

Only 3 and 4 are true

C

Only 1 and 2 are true

D

Only 2, 3 and 4 are true