Convolutional Multiplexing for Multicarrier Systems

Author

Jiang, Wei ; Li, Daoben ; Mao, Xingpeng

Author_Institution

Sch. of Inf. Eng., Beijing Univ. of Posts & Telecommun.

fYear

2007

fDate

11-15 March 2007

Firstpage

633

Lastpage

638

Abstract

A new multiplexing scheme with high diversity gain for multicarrier systems, which is called multicarrier convolutional multiplexing (MCCM), is proposed. In this scheme the data symbols are spread onto several subcarriers by a convolutional spreader. Compared to the conventional OFDM (orthogonal frequency division multiplexing) system, the MCCM system using well designed spreading codes can achieve diversity with order equal to the length of the codes in frequency selective fading channels. A simple free distance searching algorithm is utilized to search the codes with the optimized performance. The best codes of length four are presented and their performance is evaluated by numerical simulations.

Keywords

OFDM modulation; convolutional codes; fading channels; convolutional spreader; data symbols; diversity gain; free distance searching algorithm; frequency selective fading channels; multicarrier convolutional multiplexing; multicarrier systems; orthogonal frequency division multiplexing system; spreading codes; AWGN; Convolution; Convolutional codes; Diversity methods; Diversity reception; Fading; Frequency diversity; Multicarrier code division multiple access; Numerical simulation; OFDM;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Networking Conference, 2007.WCNC 2007. IEEE

Conference_Location

Kowloon

ISSN

1525-3511

Print_ISBN

1-4244-0658-7

Electronic_ISBN

1525-3511

Type

conf

DOI

10.1109/WCNC.2007.122

Filename

4224367