Internet senza fili cambia il mondo delle

Telecomunicazioni

Breve panoramica dalle ORIGINI al FUTURO

(fare click per procedere)

La telefonia ebbe origine da un illustre Italiano

… riconosciuto tardivamente …

But it seems that history must be rewritten if justice is to be done to an immigrant from Florence, Italy: Antonio Meucci, who invented the telephone in 1849 and filed his first patent caveat (notice of intention to take out a patent) in 1871, setting into motion a series of mysterious events and injustices which would be incredible were they not so well documented. http://www.italianhistorical.org/MeucciStory.htm

… riconosciuto tardivamente …

But it seems that history must be rewritten if justice is to be done to an immigrant from Florence, Italy: Antonio Meucci, who invented the telephone in 1849 and filed his first patent caveat (notice of intention to take out a patent) in 1871, setting into motion a series of mysterious events and injustices which would be incredible were they not so well documented. http://www.italianhistorical.org/MeucciStory.htm

Inventore del telefono

1808 - 1889

Inventore del telefono

1808 - 1889

   

Le tappe dell’evoluzione

Brief History

1. Telegraph invented by Gauss and Weber in 1834, perfected by Morse in 1844, Marconi and Popov worked on wireless, and in 1901 trans Atlantic

wireless from Cornwall to Newfoundland.

2. 1860 Telephone developed by Reiss, 1876 Bell Telephone founded, 1878 first telephone exchange in New Haven, CT, 1915 transcontinental telephone TJ Watson to AG Bell, 1953 transatlantic telephone cable, 1960s mobile radio (cellular).

3. 1900s AM invented and popularized by De Forest; commercial radio station begins broadcasting in Pittsburgh 1920.

4. 1933 FM and angle modulation proposed by Armstrong (much opposition by De Forest), but success by 1949.

5. 1929 Zworykin develops TV camera (iconoscope); 1939 BBC broadcasts TV, color TV in US in 1954.

(da: http://www.media.mit.edu)

Brief History

1. Telegraph invented by Gauss and Weber in 1834, perfected by Morse in 1844, Marconi and Popov worked on wireless, and in 1901 trans Atlantic

wireless from Cornwall to Newfoundland.

2. 1860 Telephone developed by Reiss, 1876 Bell Telephone founded, 1878 first telephone exchange in New Haven, CT, 1915 transcontinental telephone TJ Watson to AG Bell, 1953 transatlantic telephone cable, 1960s mobile radio (cellular).

3. 1900s AM invented and popularized by De Forest; commercial radio station begins broadcasting in Pittsburgh 1920.

4. 1933 FM and angle modulation proposed by Armstrong (much opposition by De Forest), but success by 1949.

5. 1929 Zworykin develops TV camera (iconoscope); 1939 BBC broadcasts TV, color TV in US in 1954.

(da: http://www.media.mit.edu)

La telefonia : commutazione manuale

                           

                         

                                     

… Intanto Marconi inventava la radio

Guglielmo Marconi , (Bologna 1874 - Roma 1937) è stato l' inventore italiano del primo sistema pratico di segnalazione radio. Studiò a Bologna e a Firenze e fin da giovanissimo, intuendo la possibilità di utilizzare le onde elettromagnetiche per inviare segnali a distanza, si interessò di telegrafia senza fili. Verso il 1895, potete consultare anche 100 YEARS OF RADIO - HOME PAGE , dopo numerosi esperimenti realizzati nella villa paterna di Pontecchio, mise a punto un'apparecchiatura con cui riuscì a inviare segnali intelligibili a una distanza di circa 2400 m, usando un'antenna direzionale. Dopo aver brevettato il sistema telegrafico in Gran Bretagna (1896), fondò a Londra la Marconi's Wireless Telegraph and Signal Company, nella quale lavorarono diversi scienziati a un ulteriore perfezionamento dei progetti.

Guglielmo Marconi , (Bologna 1874 - Roma 1937) è stato l' inventore italiano del primo sistema pratico di segnalazione radio. Studiò a Bologna e a Firenze e fin da giovanissimo, intuendo la possibilità di utilizzare le onde elettromagnetiche per inviare segnali a distanza, si interessò di telegrafia senza fili. Verso il 1895, potete consultare anche 100 YEARS OF RADIO - HOME PAGE , dopo numerosi esperimenti realizzati nella villa paterna di Pontecchio, mise a punto un'apparecchiatura con cui riuscì a inviare segnali intelligibili a una distanza di circa 2400 m, usando un'antenna direzionale. Dopo aver brevettato il sistema telegrafico in Gran Bretagna (1896), fondò a Londra la Marconi's Wireless Telegraph and Signal Company, nella quale lavorarono diversi scienziati a un ulteriore perfezionamento dei progetti.

Marconi a bordo dell’ Elettra

Marconi a bordo dell’ Elettra

http://www.geocities.com/CapeCanaveral/Hall/2875/GAMT/marconi.htmhttp://www.geocities.com/CapeCanaveral/Hall/2875/GAMT/marconi.htm

… col campionamento la voce diventa digitale

Nyquist-Shannon

sampling theoremFrom Wikipedia, the free encyclopedia.

The Nyquist-Shannon sampling theorem is the fundamental theorem in the field of information theory, in particular telecommunications. It is also known as the Whittaker-Nyquist-Kotelnikov-Shannon sampling theorem or just simply the sampling theorem.

The theorem states that:

when sampling a signal (e.g., converting from an analog signal to digital), the sampling frequency must be greater than twice the bandwidth of the input signal in order to be able to reconstruct the original perfectly from the sampled version.

(Nyquist - 1928 ; Kotelnikov – 1933; Whittaker – 1935; Gabor – 1946; Shannon – 1948)

Nyquist-Shannon

sampling theoremFrom Wikipedia, the free encyclopedia.

The Nyquist-Shannon sampling theorem is the fundamental theorem in the field of information theory, in particular telecommunications. It is also known as the Whittaker-Nyquist-Kotelnikov-Shannon sampling theorem or just simply the sampling theorem.

The theorem states that:

when sampling a signal (e.g., converting from an analog signal to digital), the sampling frequency must be greater than twice the bandwidth of the input signal in order to be able to reconstruct the original perfectly from the sampled version.

(Nyquist - 1928 ; Kotelnikov – 1933; Whittaker – 1935; Gabor – 1946; Shannon – 1948)

Claude Elwood Shannon

1916 - 2001

Claude Elwood Shannon

1916 - 2001

Dalle valvole …. ai transistor e Chips integrati

… verso l’alta densità di integrazione

Dal rame … alla fibra

Radio dal cielo …..

GALILEO: Un nuovo impiego estensivo dei satellitiGALILEO: Un nuovo impiego estensivo dei satelliti

Short Short RangeRangeShort Short RangeRange

WPAN / BANWPAN / BAN

IEEE 802.15xIrDA

RFIDSensors Bluetooth

WLANWLAN

IEEE 802.11x HiperLAN2

Proprietarysolutions

LANLAN

Ethernet

HomePNAIEEE 1394

HomePlug

EIB

HomePlug and Play

Powerline

TransportTransportTransportTransport

Narrow/ Narrow/ BroadbanBroadband Wireless d Wireless

AccessAccess

Narrow/ Narrow/ BroadbanBroadband Wireless d Wireless

AccessAccess

Fixed Fixed BWABWA

LMDS

HIPERACCESS MVDS

IEEE 802.16-2004

Cellular Cellular MobileMobile

GSM

EDGEUMTS CDMA2000

PDC

IEEE 802.20IEEE 802.16e

CDMAOne

GPRS

Quasi Quasi CellularCellular

MBS 40MBS 60

DECT

Wired Wired AccessAccessWired Wired AccessAccess

xDSLxDSL

ADSL

VDSL HDSL

SDSL

ADSL2

Optical Optical SolutionsSolutions

EPON GiBE

PLCPLCPLCPLC

BroadcastinBroadcastingg

DABDVB-T

SatelliteSatellite

S-UMTSDVB-S

BroadbandSatellite

Other Other WirelesWireles

s s AccessAccess

Other Other WirelesWireles

s s AccessAccess

User Centric ICT Vision

WiMAX applicationstargeting 802.16d/e applications

802.16eFull

Nomadism

IP Services for SMALL BUSINESS

E1/T1 Leased-Lines ENTERPRISE

BACKHAUL for HOTSPOTS

802.16REVd RESIDENTIAL &

SoHo Wireless DSL

WiFi

GSMGPRSUMT

S

Universal telecom platform inside the car for communication between the car (voice, data) and the outside

Veicoli del Futuro: Piattaforma di Telecomunicazioni

                                  

Positionning

Technical Information from the car

Security services: emergency, police

Web

Automotive diagnostic center

Automotive customer center

Navigation with traffic and Point of interest

Public network

Other applications

                  Voice and data from

conductor or passenger