Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Electrical & Electronics Expert

problem 1: Describe the difference between slow FHSS and fast FHSS.

problem 2: What do you mean by direct sequence spread spectrum?

problem 3: What is the relationship between bit rate of a signal before and after it has been encoded by using DSSS?

problem 4: What do you mean by CDMA?

problem 5: Suppose that we wish to transmit a 56-kbps data stream by using spread spectrum.

a) Find out the channel bandwidth needed when SNR = 0.1, 0.01 and 0.001.

b) In an ordinary (not spread spectrum) system, a reasonable goal for bandwidth efficiency might be 1 bps/Hz. That is to transmit a data stream of 56 kbps; a bandwidth of 56 kHz is used. In this case, Find out the minimum SNR which can be endured for transmission devoid of appreciable errors? Compare to spread spectrum case?

problem 6: An FHSS system employs a total bandwidth of WS = 400 MHz and an individual channel bandwidth of 100 Hz. Find out the minimum number of PN bits needed for each frequency hop?

problem 7: The given table describes the operation of an FHSS system for one complete period of the PN sequence.

563_operation of FHSS system.jpg

a) Determine the period of PN sequence?
b) The system makes use of a form of FSK. What form of FSK is it?
c) Determine the number of bits per symbol?
d) Determine the number of FSK frequencies?
e) Determine the length of a PN sequence per hop?
f) Is this slow or fast FHSS?
g) Determine the total number of possible hops?
h) Show the variation of the dehopped frequency with time.

problem 8: The given table describes the operation of a FHSS system by using the same PN sequence as in the problem above.

1154_pn sequence.jpg

a) Determine the period of PN sequence?
b) The system makes use of a form of FSK. What form of FSK is it?
c) Determine the number of bits per symbol?
d) Determine the number of FSK frequencies?
e) Determine the length of a PN sequence per hop?
f) Is this slow or fast FHSS?
g) Determine the total number of possible hops?
h) Display the variation of the dehopped frequency with time.

Electrical & Electronics, Engineering

  • Category:- Electrical & Electronics
  • Reference No.:- M97273

Have any Question? 


Related Questions in Electrical & Electronics

An investor wishes to install a wind farm in the snoqualmie

An investor wishes to install a wind farm in the Snoqualmie pass area located in Washington State, United States. The pass is about 920m above the sea level. The average low temperature of the air is -4°C, and the averag ...

An industrial load is powered by purely sinusoidal voltage

An industrial load is powered by purely sinusoidal voltage source. The load current has a THD of 20%, and the power factor of the fundamental waveforms is 0.8. Compute the power factor of the load.

Two 100 kg football players wearing regulation helmets

Two 100 kg football players wearing regulation helmets collide helmet to helmet while each is moving directly at each other at 10.0 m/s and come to a near instantaneous ( 2 , and the helmets are each designed to provide ...

Devise an example using an 8-bit code word to show that

Devise an example using an 8-bit code word to show that even parity and odd parity cannot be used to detect two separate bit flips in a code word.

Repeat given problem if the plates are separated by 4

Repeat given Problem if the plates are separated by 4 mils. Problem Find the electric field strength between the plates of a parallel plate capacitor if 100 µV are applied across the plates and the plates are 2 mm apart.

Write the answer of the following questionsthe weekly

Write the answer of the following questions: The weekly discharge of a typical hydroelectric plant is as under :                        Day Sun  Mon  Tues  Wed  Thurs  Fri  Sat Discharge(m3/sec) 500  520    850   800    ...

If a kernel of an algorithm is accelerated by a factor of

If a kernel of an algorithm is accelerated by a factor of 100, and the kernel accounts for 90% of execution time before acceleration, what is the overall speedup?

Three single-phase transformers are used to form a

Three single-phase transformers are used to form a three-phase transformer bank rated 13.8 kV(Δ)/120kV(Y). One side of the transformer bank is connected to a 120 kV transmission line, and the other side is connected to a ...

Consider the transconductance amplifier shown in given

Consider the transconductance amplifier shown in given Figure. Assume the op-amp is ideal. (a) Derive the expression for the transconductance function A g f  = I o /V i . (b) If the circuit is designed such that R F  /R ...

The input to a filter consists of a half-sinusoidal

The input to a filter consists of a half-sinusoidal pulse plus zero-mean white Gaussian noise. (a) Suppose the impulse response of the filter is rectangular,   What should the width of the rectangle t A  be in order to m ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

A cola-dispensing machine is set to dispense 9 ounces of

A cola-dispensing machine is set to dispense 9 ounces of cola per cup, with a standard deviation of 1.0 ounce. The manuf

What is marketingbullwhat is marketing think back to your

What is Marketing? • "What is marketing"? Think back to your impressions before you started this class versus how you

Question -your client david smith runs a small it

QUESTION - Your client, David Smith runs a small IT consulting business specialising in computer software and techno

Inspection of a random sample of 22 aircraft showed that 15

Inspection of a random sample of 22 aircraft showed that 15 needed repairs to fix a wiring problem that might compromise

Effective hrmquestionhow can an effective hrm system help

Effective HRM Question How can an effective HRM system help facilitate the achievement of an organization's strate