'Bandwidth efficiency' diaporamas de présentation

Defining, Desiging and Evaluating Digital Communication Systems

Defining, Desiging and Evaluating Digital Communication Systems. Jacek Ilow, Ph.D. Associate Professor. Department of Electrical and Computer Engineering Dalhousie University Halifax,Canada. J.ilow@dal.ca http://www.dal.ca/~jilow http:// radio-1.ee.dal.ca/~ilow.

1.31k views • 92 slides

EC 723 Satellite Communication Systems

EC 723 Satellite Communication Systems. Mohamed Khedr http://webmail.aast.edu/~khedr. Syllabus. Tentatively. Frequency Shift Keying. Two signals are used to convey information In principle, the transmitted signal appears as 2 sinx/x functions at carrier frequencies

1.05k views • 75 slides

Project: IEEE P802.11 Working Group for Wireless Lacal Area Networks (WLANs)

Project: IEEE P802.11 Working Group for Wireless Lacal Area Networks (WLANs) Submission Title: Inprocomm PHY Proposal for IEEE 802.11n: MASSDIC-OFDM Date Submitted: Aug 13 th , 2004 Source: Kim Wu et al., Inprocomm, Inc. Address 9F, No. 93, Shuei-Yuan St. Hsinchu, 300 Taiwan, R.O.C

714 views • 58 slides

Signal Encoding Techniques

Signal Encoding Techniques. Chapter 6. Digital Vs Analog. Reasons for Choosing Encoding Techniques. Digital data, digital signal Equipment less complex and expensive than digital-to-analog modulation equipment Analog data, digital signal

1.08k views • 52 slides

Multi-Protocol Lambda Switching for Packet, Lambda, and Fiber Network

Multi-Protocol Lambda Switching for Packet, Lambda, and Fiber Network. Jun Kyun Choi jkchoi@icu.ac.kr Tel) (042) 866-6122. Contents. Backgrounds for Optical Network Review of SONET/SDH Technologies Motivations for IP over WDM Physical Limitation for Optical Internet

742 views • 50 slides

Customer Presentation

525 views • 34 slides

S-72.1140 Transmission Methods in Telecommunication Systems (5 cr)

S-72.1140 Transmission Methods in Telecommunication Systems (5 cr). Digital Bandpass Transmission. Digital Bandpass Transmission. CW detection techniques Coherent Non-coherent Differentially coherent Examples of coherent and non-coherent detection error rate analysis (OOK)

545 views • 31 slides

Vehicular Communication Technology

Vehicular Communication Technology. Motivation. Safety and transport efficiency In Europe around 40 , 000 people die and more than 1.5 millions are injured every year on the roads Traffic jams generate a tremendous waste of time and of fuel

494 views • 29 slides

S-72.245 Transmission Methods in Telecommunication Systems (4 cr)

S-72.245 Transmission Methods in Telecommunication Systems (4 cr). Carrier Wave Modulation Systems. Analog Carrier Wave Systems. Carrier wave techniques form a bases for telecommunication systems Topics today in CW-applications: Single conversion radio receiver

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Combined Linear & Constant Envelope Modulation

992 views • 26 slides

4G Here We Come! Pulver Voice Over Networks Conference Phoenix, Arizona March 23, 2001

4G Here We Come! Pulver.com Voice Over Networks Conference Phoenix, Arizona March 23, 2001. Phillip D. Neumiller Phil_Neumiller@3Com.com Mobility Zealot at Large 3Com Corporation 3800 Golf Road Rolling Meadows, IL 60008. Outline Wideband RF channels an Overview Spectrum Absurdities

362 views • 26 slides

4G Here We Come! Pulver Voice Over Networks Conference Phoenix, Arizona March 23, 2001

4G Here We Come! Pulver.com Voice Over Networks Conference Phoenix, Arizona March 23, 2001. Phillip D. Neumiller Phil_Neumiller@3Com.com Mobility Zealot at Large 3Com Corporation 3800 Golf Road Rolling Meadows, IL 60008. Outline Wideband RF channels an Overview Spectrum Absurdities

262 views • 26 slides

Optical Burst/Packet Switching Networks ( Based on the Application Packet Switching in Future

Optical Burst/Packet Switching Networks ( Based on the Application Packet Switching in Future

486 views • 23 slides

238 views • 23 slides

Towards efficient traffic-analysis resistant anonymity networks

365 views • 21 slides

Analog/Digital Modulation

Analog/Digital Modulation. Analog Modulation The input is continuous signal Used in first generation mobile radio systems such as AMPS in USA. Digital Modulation The input is time sequence of symbols or pulses. Are used in current and future mobile radio systems. Performance Metrics.

1.43k views • 21 slides

EFFICIENCY, LEGITIMACY, IMPACT

EFFICIENCY, LEGITIMACY, IMPACT. Robert Horvitz ? Director OPEN SPECTRUM FOUNDATION Amsterdam/Prague. 1. SPECTRUM EFFICIENCY: Using the least amount of spectrum to deliver the greatest amount of information Erlangs/MHz/km 2 (voice) MBits/MHz/km 2 (data). Spectrum Efficiency.

286 views • 16 slides

Factors in Digital Modulation

Factors in Digital Modulation. efficiency: low BER at low SNR channel : multipath & fading conditions minimize bandwidth required cost- effective & easy implementation. Performance Measures for Modulation Schemes (i) ? p = power efficiency (ii) ? B = bandwidth efficiency.

406 views • 13 slides

Technology agnostic OSPF-TE extensions for GMPLS

draft-bccgd-ccamp-gmpls-opsf-agnostic-00 CCAMP WG, IETF 79 th Beijing. Technology agnostic OSPF-TE extensions for GMPLS. Authors/Contributors. Sergio Belotti (sergio.belotti@alcatel-lucent.com) Diego Caviglia (diego.caviglia@ericsson.com)

215 views • 11 slides

OSPF-TE extensions for GMPLS Control of Evolving G.709 OTN

draft-ceccarelli-ccamp-gmpls-ospf-g709-04 CCAMP WG, IETF 79 th Beijing. OSPF-TE extensions for GMPLS Control of Evolving G.709 OTN. Authors/Contributors. Sergio Belotti (sergio.belotti@alcatel-lucent.com) Diego Caviglia (diego.caviglia@ericsson.com)

229 views • 9 slides