Reduction of out-of-band radiation in OFDM systems by insertion of cancellation carriers

Author

Brandes, Sinja ; Cosovic, Ivan ; Schnell, Michael

Author_Institution

Inst. of Commun. & Navigation, German Aerosp. Center, Wessling

Volume

10

Issue

6

fYear

2006

fDate

6/1/2006 12:00:00 AM

Firstpage

420

Lastpage

422

Abstract

Orthogonal frequency-division multiplexing (OFDM) suffers from high out-of-band radiation. In this letter, we investigate a new method for sidelobe suppression characterized by the insertion of a few so-called cancellation carriers (CCs) at both sides of the OFDM spectrum. These special carriers are modulated with complex weighting factors which are optimized such that the sidelobes of the CCs cancel the sidelobes of the transmit signal. With this technique a significant reduction of out-of-band radiation is achieved at the cost of a small degradation in system performance

Keywords

OFDM modulation; interference suppression; optimisation; radiocommunication; OFDM system; cancellation carrier; complex weighting factor; optimization; orthogonal frequency-division multiplexing; out-of-band radiation reduction; sidelobe suppression; signal modulation; Carbon capture and storage; Costs; Data communication; Degradation; Frequency division multiplexing; Helium; OFDM modulation; Phase shift keying; Quadrature amplitude modulation; System performance;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2006.1638602

Filename

1638602