6COMMS-Faculty of Computing, Engineering & Technology

May 1st, 2015
Studypool Tutor
Price: $10 USD

Tutor description

Why is modulation is needed? What is modulation? Digital modulation & demodulation techniques Obtain SNR of system by: Signal Power; Noise Power

Word Count: 2864
Showing Page: 1/81
6COMMSFaculty of Computing,Engineering & TechnologyDigital modulation:ASK, FSK, PSKCommunicationsCOMMS (CE700038-2)Alison L CarringtonC203A.L.Carrington@staffs.ac.ukwww.fcet.staffs.ac.uk/alg12008/9Digital modulation:ASK, FSK, PSK2OverviewWhy is modulation is needed?What is modulation?Digital modulation & demodulation techniquesObtain SNR of system by:Signal PowerNoise PowerDetermine the performance of different DigitalMod/Demod techniques with different amountsof noiseCOMMS (CE700038-2) 2008/93IntroductionDigital modulation:ASK, FSK, PSKOften send information in a digital formAs binary words, bits represented by 1s & 0sCould be from a keyboard, characters encoded as1s & 0sOr a microphone (speech)Or a temperature sensorconverted to binary form by A/D converter.Why do we need to modulate?COMMS (CE700038-2) 2008/9Digital modulation:ASK, FSK, PSK4Why modulate?The purpose of a communication system is totransfer information from a source to adestinationProblems arise in baseband transmissions:Noiseexternal & circuit noise reduces the signal-to-noise (S/N)ratio at the receiver, (Rx) reducing the quality of theoutput.Not able to fully utilise the available bandwidth:telephone quality speech has a bandwidth 3kHzco-axial cable has a bandwidth of 100's of Mhz.COMMS (CE700038-2) 2008/95What is Modulation? #1Digital modulation:ASK, FSK, PSKA message signal containing information is u

Review from student

Studypool Student
" Excellent job "
Ask your homework questions. Receive quality answers!

Type your question here (or upload an image)

1827 tutors are online

Brown University





1271 Tutors

California Institute of Technology




2131 Tutors

Carnegie Mellon University




982 Tutors

Columbia University





1256 Tutors

Dartmouth University





2113 Tutors

Emory University





2279 Tutors

Harvard University





599 Tutors

Massachusetts Institute of Technology



2319 Tutors

New York University





1645 Tutors

Notre Dam University





1911 Tutors

Oklahoma University





2122 Tutors

Pennsylvania State University





932 Tutors

Princeton University





1211 Tutors

Stanford University





983 Tutors

University of California





1282 Tutors

Oxford University





123 Tutors

Yale University





2325 Tutors