Ask Question, Ask an Expert


Ask Computer Network & Security Expert


A composite signal is composed of three sine waves. First wave has frequency of 1 Hz, phase shift of 0 and maximum amplitude of 5 volts; second wave has frequency of 1 Hz, phase shift of 180 degrees ( π radians) and maximum amplitude of 2 volts, and third wave has frequency of 2 Hz, phase shift of 0 and maximum amplitude of 1 volt.

a) find out bandwidth of this composite signal? Is this periodic or non-periodic signal?
b) find out value of the voltage of this composite signal at each of the following two points of time: i) t = 0.25 second and ii) t = 0.75 second.
c) Draw time domain plot in a interval t= 0 to t= 1 second for the three sine waves, then plot approximate shape of the composite signal in this interval.


Periodic composite signal contains sine harmonics with frequencies from 10 KHz to 80 KHz. The fundamental frequency of the first harmonic of this composite signal is 10 KHz and all harmonics in the range 10-80 KHz are included in the composite signal. The signal is transmitted over a channel that has attenuation of - ∞ dB for all frequencies less than or equal to 40 KHz and attenuation of -3 dB for all frequencies larger than 40 KHz. All harmonics have a maximum power of 10 milliwatts (mW) at the sender’s side of the channel.

a) What is the bandwidth of the signal at the sender’s side of the channel?
b) How many harmonics reach the receiver?
a) What is the bandwidth of the signal at the receiver’s side of the channel?
c) What is the maximum power (in mW) of each received harmonic?


Consider the channel between sender S and receiver R.

a) Channel has bandwidth of 20 KHz and signal-to-noise ratio SNR = ∞ . find out bit rate of this channel using a digital signal which has four voltage levels.
b) Channel has bandwidth of 8 KHz and a signal-to-noise ratio SNR = 63. find out theoretical highest bit rate (i.e., capacity) of this channel.
c) Sender S transmits fixed length packets to receiver R over a link at the speed of 1000 packets/second. The one-way propagation delay of this link is 0.01 second. If the cable of the link is cut, all packets in transit on the link are lost. What are the possible values of the number of lost packets when the cable is cut?


Non-periodic analog signal has spectrum with frequencies between 0 and 5000 Hz. Signal is sampled at the Nyquist sampling rate which guarantees the successful reconstruction of an analog signal. At each sample point, the intensity of the signal is measured and is encoded as an integer number of length 8 bits.

a) What is the bit rate of the traffic generated by the digitized signal?
b) Assume the digitized signal is transmitted as a stream of packets from the sender to the  receiver over two hops (links) each of which has an attenuation of -1.5 dB. The power of transmission at the sender’s side is 50 milliwatts. What is the power of the signal at the receiver’s side?
c) Assume the one-way propagation delay for the first link in part (b) is 100 milliseconds. Using the transmission speed (bit rate) obtained in part a, what is the value of the traffic volume (in bits) that fills the first link?

Computer Network & Security, Computer Science

  • Category:- Computer Network & Security
  • Reference No.:- M9449

Have any Question? 

Related Questions in Computer Network & Security

There are many arguments about cloud based information

There are many arguments about cloud based information services and/or offering IT as a cloud-based service. Some say cloud computing is nothing more than outsourcing IT and creating a dependency that will trap the organ ...

Firewall fundamentalsactions for firewall

Firewall Fundamentals Actions for 'Firewall Fundamentals Firewalls are considered the key element in securing networks. A firewall is usually a computer that sits on two different networks and passes allowed traffic betw ...

Why do networking components need more examination from an

Why do networking components need more examination from an InfoSec perspective than from a systems development perspective? What value would an automated asset inventory system have for the risk identification process? W ...

Benefits of cloud-based office productivity softwarebased

Benefits of Cloud-based Office Productivity Software Based on what you have learned about using cloud-based office productivity software, create a 5-slide presentation to the department head or CEO to convince him or her ...

Questions1 describe three factors that help to influence

Questions: 1. Describe three factors that help to influence our nation's focus on natural or man-made disasters. 2. What issues have been raised concerning some of the authorities granted to government agencies in the PA ...

A company in manhattan still keeps to the traditional

A company in Manhattan still keeps to the traditional mailing approaches even though the nature of their business strictly involves confidential documents that need to be sent to clients. Tell this Manhattan Company why ...

Topic ethernet technologiescreate a short essay 1 to 3

Topic: Ethernet Technologies Create a short essay (1 to 3 pages) that describes an Ethernet frame. You will need to do some research to understand the construction of an Ethernet frame. As you describe an Ethernet frame, ...

Dqfacebook email electronic commerce and collaborative

DQ Facebook, email, electronic commerce, and collaborative sites for both work and leisure are a normal part of our everyday computing activities. Personal information entered on these websites become partially owned by ...

Assignment elastic and inelastic trafficwrite a three to

Assignment: Elastic and Inelastic Traffic Write a three to four page paper in which you: 1. Outline a plan for the development of an addressing and naming model in an environment of the following scenario: o Ten departme ...

Q1 the first transcontinental telephone service was

Q1. The first transcontinental telephone service was established in the 1940s. a. true b. false Q2. The Internet was started by the U.S. Department of defense in 1969 as a network of four computers called ARPANET. a. tru ...

  • 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

WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

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