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

1 does sip need to use the service of rtp explain2 we

1. Does SIP need to use the service of RTP? Explain. 2. We mentioned that SIP is an application-layer program used to provide a signaling mechanism between the caller and the callee. Which party in this communication is ...

1 explain the term internal inductance2 what is meant by

1. Explain the term internal inductance. 2. What is meant by the quasistatic extension of the static field in a physical structure? 3. Outline the steps involved in the electroquasistatic field analysis of a parallel pla ...

1 what is the permittivity of free space what are its

1. What is the permittivity of free space? What are its units? 2. Describe the electric field due to a point charge. 3. How do you find the electric field intensity due to a continuous charge distribution? 4. How is curr ...

It is desired to strip trichloroethylene o2hcl3 from a

It is desired to strip trichloroethylene, O 2 HCl 3 , from a contaminated groundwater stream. The groundwater, which can be treated as a dilute water stream, will be fed to the top of the tower operating at 288 K and 1.0 ...

A sketch x omega the amplitude spectrum of a signal x t 3

a. Sketch |X (ω)|, the amplitude spectrum of a signal x (t) = 3 cos 6πt + sin 18πt + 2 cos(28 - ∉)πt, where ∉ is a very small number → 0. Determine the minimum sampling rate required to be able to reconstruct x (t) from ...

1 what is the magnetic flux crossing an infinitesimal

1. What is the magnetic flux crossing an infinitesimal surface oriented parallel to the magnetic flux density vector? 2. For what orientation of the infinitesimal surface relative to the magnetic flux density vector is t ...

1 draw the symbols for the nand nor xor and xnor gates what

1. Draw the symbols for the NAND, NOR, XOR, and XNOR gates. What is the difference between the Buffer, AND, OR, XOR and the NOT, NAND, NOR, and XNOR gates? 2. Modify the circuit from question 2 to use a second AND gate o ...

1 are both ah and esp needed for ip security why or why

1. Are both AH and ESP needed for IP security? Why or why not? 2. What are the two protocols discussed in this chapter that provide security at the transport layer? 3. What is IKE? What is its role in IPSec? 4. What is t ...

1 state maxwells equations for static fields ina integral

1. State Maxwell's equations for static fields in (a) integral form, and (b) differential form. 2. Discuss the classification of static fields with reference to subsets of Maxwell's equations. 3. Outline the steps involv ...

1 what is the significance of a nonzero net right-lateral

1. What is the significance of a nonzero net right-lateral differential of and normal to the z-direction at a point in space? 2. If a pair of E and B at a point satisfies Faraday's law in differential form, does it neces ...

  • 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

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen