Trellis-coded-modulation-OFDMA for spectrum sharing in cognitive environment

Author

Mokari, Nader ; Navaie, Keivan ; Saeedi, Hamid

Author_Institution

Dept. of ECE, Tarbiat Modares Univ., Tehran, Iran

fYear

2012

fDate

1-4 July 2012

Abstract

In this paper, we consider an underlay spectrum sharing system and propose utilizing discrete rate Trellis Coded Modulation Orthogonal Frequency Division Multiple Access (TCM-OFDMA) technique in the secondary system. Downlink radio resource allocation schemes are then proposed for such system. Simulation results indicate that using the proposed scheme, we can significantly increase the sum rate compared to conventional uncoded OFDMA schemes with only a moderate increase in system complexity. It is also shown that in cases where the secondary network is unable to achieve higher rates by increasing the total power and/or interference threshold, utilizing TCM-OFDMA acts as a smart alternative.

Keywords

OFDM modulation; cognitive radio; frequency division multiple access; radio spectrum management; trellis coded modulation; cognitive environment; frequency division multiple access; trellis coded modulation OFDMA; underlay spectrum sharing system; Base stations; Encoding; Interference; Modulation; Optimization; Resource management; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Computers and Communications (ISCC), 2012 IEEE Symposium on

Conference_Location

Cappadocia

ISSN

1530-1346

Print_ISBN

978-1-4673-2712-1

Electronic_ISBN

1530-1346

Type

conf

DOI

10.1109/ISCC.2012.6249396

Filename

6249396