Diversity Analysis of Smart Relaying

Author

Vien, Nam H. ; Nguyen, Ha H. ; Le-Ngoc, Tho

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of Saskatchewan, Saskatoon, SK

fYear

2008

Firstpage

1

Lastpage

5

Abstract

For a decode-and-forward (DF) relaying system with maximal-ratio combining (MRC) at the destination, spatial diversity is lost except when the source-relay link is reliable. This paper considers and analyzes a smart relaying scheme, in which the relay scales its transmitted power adaptively to the channel conditions without exceeding the total power used in the conventional relaying system. Performance analysis proves that a diversity order of two is always achieved with binary- phase-shift-keying (BPSK) and quadrature-phase-shift-keying (QPSK) constellations. The order-2 diversity is also observed from numerical results for rectangular quadrature amplitude modulation (QAM).

Keywords

channel allocation; diversity reception; quadrature amplitude modulation; quadrature phase shift keying; telecommunication links; binary- phase-shift-keying constellations; channel conditions; decode-and-forward relaying system; diversity analysis; maximal-ratio combining; order-2 diversity; performance analysis; quadrature-phase-shift-keying constellations; rectangular quadrature amplitude modulation; smart relaying; source-relay link; spatial diversity; Binary phase shift keying; Decoding; Diversity reception; Performance analysis; Phase shift keying; Power system relaying; Power system reliability; Quadrature amplitude modulation; Quadrature phase shift keying; Relays;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 2008. IEEE GLOBECOM 2008. IEEE

Conference_Location

New Orleans, LO

ISSN

1930-529X

Print_ISBN

978-1-4244-2324-8

Type

conf

DOI

10.1109/GLOCOM.2008.ECP.922

Filename

4698697