A Flexible Parallel Transmission Scheme Using Frequency Domain Multi-Layered OFDM System

Author

Yang, Jiaxin ; Wang, Xianbin ; Park, Sung Ik ; Kim, Heung Mook

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of Western Ontario, London, ON, Canada

fYear

2011

fDate

15-18 May 2011

Firstpage

1

Lastpage

5

Abstract

A novel adaptive Orthogonal Frequency-Division Multiplexing (OFDM) system with multi-layered (ML) transmission is proposed for mobile multimedia networks to support transmission of multiple data streams with flexible Quality-of-Service (QoS) adjustment capability and therefore can accommodate users with different QoS requirements or link conditions. The enhanced layers (ELs), formulated by parallel modulated orthogonal pseudo-random sequences, are superimposed onto OFDM data in frequency domain prior to multicarrier modulation and used to transmit different data information without the requirement of additional links. In this paper, the transceiver design particularly the frequency domain correlation detector and ELs induced interference cancellation is presented. A power distribution scheme for ELs is further proposed to optimize the overall system performance. The performance of the proposed ML-OFDM system is evaluated through numerical simulations.

Keywords

OFDM modulation; interference suppression; mobile radio; multimedia communication; quality of service; radio transceivers; random sequences; QoS; adaptive orthogonal frequency division multiplexing; enhanced layer; flexible parallel transmission scheme; flexible quality of service adjustment; frequency domain multilayered OFDM system; interference cancellation; mobile multimedia networks; multiple data stream; parallel modulated orthogonal pseudorandom sequence; power distribution; transceiver design; Bit error rate; Demodulation; Frequency domain analysis; Multimedia communication; OFDM; Power distribution; Quality of service;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference (VTC Spring), 2011 IEEE 73rd

Conference_Location

Yokohama

ISSN

1550-2252

Print_ISBN

978-1-4244-8332-7

Type

conf

DOI

10.1109/VETECS.2011.5956647

Filename

5956647