الرحيم الرحمن الله بسم

Milestones in the history of OFDM

Collected By: Eng. SINAN M. A. DHEYAB

OFDM HISTOR YMilestoneYear

Kineplex, multi-carrier HF modem (R.R. Mosier & R.G. Clabaugh) 1957

Some earlier work was Holsinger’s 1964 MIT dissertation and some of Gallager’s early work on water filling.1964

Chang shows that multi-carrier modulation can solve the multipath problem without reducing data rate. This is generally considered the first official publication on multi-carrier modulation.1966

Saltzberg studied a multi-carrier system employing orthogonal QAM(O-QAM) of the carriers.1967

 U.S. patent on OFDM issued.1970

Weinstein and Ebert show that multi-carrier modulation can be accomplished using a DFT. Weinstein & Ebert proposed use of FFT and guard interval.1971

Hirosaki designed a subchannal-based equalizer for an orthogonally multiplexed QAM system.

1980

Keasler et al .described an OFDM modem for telephone networks. Cyclic Prefix (CP) used in 1980 – orthogonality problem being solved.Cimini at Bell Labs identifies many of the key issues in OFDM transmission and does a proof-of-concept design .Cimini described use of OFDM for mobile communications

1985

 Telebit Trailblazer Modem introduced

incorporating a 512 carrier Packet Ensemble Protocol

Alard & Lasalle: COFDM for digital broadcasting 1987

TH-CSF LER, first experimental Digital TV link in OFDM, Paris area

1988(September)

OFDM international patent application PCT/FR 89/00546, filed in the name of THOMSON-CSF, Fouche, de Couasnon, Travert, Monnier and all ..http://www.wipo.int/pctdb/en/wo.jsp?WO=1990/04893 1989

October 1990: TH-CSF LER, first OFDM equipment field test, 34 Mbit/s in an 8 MHz channel, experiments in Paris area

1990

December 1990: TH-CSF LER, first OFDM test bed comparison with VSB in Princeton USA.

 ANSI ADSL standard.1991

September 1992: TH-CSF LER, second generation equipment field test, 70 Mbit/s in an 8 MHz channel, twin polarisations. Wuppertal, Germany

1992

October 1992: TH-CSF LER, second generation field test and test bed with BBC, near London, UK

DSL adopts OFDM, also called discrete multi-tone, followingsuccessful field trials/competitions at Bellcore versus equalizer-basedsystems.

1993

TH-CSF show in Montreux SW, 4 TV channel and one HDTV channel in a single 8 MHz channelMorris: Experimental 150Mbit/s OFDM wireless LAN

  US   patent   5282222 , Method and apparatus for multiple access between transceivers in wireless communications using OFDM spread spectrum.

1994 ANSI HDSL standard.

ETSI Digital Audio Broadcasting standard EUreka: first OFDM based standard .

1995

ETSI WLAN standard.

1996

The first paper on optical OFDM in the open literature was reported by Pan and Green.

ETSI DVB-T standard .1997

Magic WAND project demonstrates OFDM modems for wireless LAN.

1998

ANSI VDSL and ETSI VDSL standards.ETSI BRAN standard.

The IEEE 802.11 committee on wireless LANs releases the 802.11a standard for OFDM operation in 5GHz UNI band.

1999

IEEE 802.11a wireless LAN standard (Wi-Fi)

ETSI BRAN Hiperlan/2 standards for wireless LAN.Proprietary fixed wireless access (V-OFDM, Flash-OFDM, etc.)

2000

OFDM considered for new 802.11 and 802.16 standards.

2001

Dixon et al. proposed the use of OFDM to combat modal dispersion in multimode fiber (MMF).The IEEE 802.16 committee releases an OFDM-based standard for wireless broadband access for metropolitan area networks under revision802.16a.

2002 IEEE 802.11g standard for wireless LAN.

The IEEE 802.11 committee releases the 802.11g standard for operation in the 2.4GHz band.

2003

The multi-band OFDM standard for ultra-wideband is developed, showing OFDM’s usefulness in low-SNR systems.OFDM considered for UWB (802.15.3a). IEEE 802.16-2004 standard for wireless MAN (WiMAX)

2004

 ETSI DVB-H standardCandidate for IEEE 802.15.3a standard for wireless PAN (MB-OFDM)  Candidate for IEEE 802.11n standard for next generation wireless LAN

 OFDMA is candidate for the 3GPP Long 2005

Term Evolution (LTE) air interface E-UTRA downlink.Candidate for 3.75G mobile cellular standards(3GPP &3GPP2 Long Term Evolution) named High Speed OFDM packet Access (HSOPA)

Candidate for 4G standard in China, Japan and South Korea(CJK).

The first complete LTE air interface implementation was demonstrated, including OFDM-MIMO, SC-FDMA and multi-user MIMO uplink.2007

100 Gb/s CO-OFDM transmission over 1000 km standard single-mode fiber (SSMF) with high spectral efficiency of 2 bit/s/Hz has been demonstrated by various groups.To date,As the industry is embracing the imminent commercial rollout of 100 Gb/s Ethernet (100 GbE), the feasibility of 1 Tb/s Ethernet is the next logical step.Also,multimode fiber in conjunction with multiple-input multiple-output OFDM (MIMO-OFDM) is proposed as a technology to achieve 100 Tb/s per fiber that takes advantage of mode multiplexing in the optical fiber.Future

REFERENCES www.wikipedia.com .OFDM and MC-CDMA A Primer, L. Hanzo & T. Keller.

Multiuser MIMO-OFDM for Next-Generation Wireless Systems, Vol. 95, No. 7, July 2007 | Proceedings of the IEEE, Jiang and Hanzo.Synchronization and Channel Estimation in OFDM: Algorithms for Efficient Implementation of WLAN Systems, Alfonso Luís Troya Chinchilla.Multicarrier Communications,Lecture 1 :Introduction & ofdm basics , Jian(Andrew) Zhang.