Performance Analysis of Raptor Codes in OFDM Systems

Author

Palanisamy, P. ; Sreedhar, T.V.S.

Author_Institution

Dept. of Electron. & Commun. Eng., Nat. Inst. of Technol., Trichy

fYear

2008

fDate

16-18 July 2008

Firstpage

1307

Lastpage

1312

Abstract

In wireless communication systems, intended to support broadcast services, it is not feasible to use an error control strategy such as automatic repeat request (ARQ) due to the heavy channel and transmitter load caused by all repeat-requests. An alternative error correcting strategy not suffering from the disadvantages of using ARQ is the introduction of a forward error correcting (FEC) code. In this paper, forward error correcting codes called Raptor codes (a class of Fountain codes) are applied for orthogonal frequency division multiplexing(OFDM) systems, which is a popular multi-carrier modulation technique in broadband communications and is currently being used in the IEEE 802.16e (Wi-Max) standard. The BER performance and burst-erasure correction capability of Raptor codes are compared with that of quasi-cyclic LDPC codes in AWGN channel.

Keywords

AWGN channels; OFDM modulation; WiMax; automatic repeat request; error correction codes; forward error correction; parity check codes; wireless LAN; AWGN channel; Fountain codes; IEEE 802.16e; OFDM systems; Raptor codes; Wi-Max standard; alternative error correcting strategy; automatic repeat request; broadband communications; broadcast services; burst-erasure correction capability; error control strategy; forward error correcting code; multicarrier modulation technique; orthogonal frequency division multiplexing systems; performance analysis; quasi-cyclic LDPC codes; repeat-requests; wireless communication systems; Automatic repeat request; Broadcasting; Error correction; Error correction codes; Forward error correction; Frequency division multiplexing; OFDM; Performance analysis; Transmitters; Wireless communication; Code constraint processor; Erasure channel; LDPC code; OFDM; Raptor code;

fLanguage

English

Publisher

ieee

Conference_Titel

Emerging Trends in Engineering and Technology, 2008. ICETET '08. First International Conference on

Conference_Location

Nagpur, Maharashtra

Print_ISBN

978-0-7695-3267-7

Electronic_ISBN

978-0-7695-3267-7

Type

conf

DOI

10.1109/ICETET.2008.196

Filename

4580107