On the DMT-Optimality of Nondynamic DF Relaying in Asymmetric Nakagami Fading Channels

Author

Kim, Tùng T. ; Skoglund, Mikael

Author_Institution

Sch. of Electr. Eng., R. Inst. of Technol. (KTH), Stockholm, Sweden

Volume

56

Issue

7

fYear

2010

fDate

7/1/2010 12:00:00 AM

Firstpage

3304

Lastpage

3309

Abstract

The optimality of nondynamic DF relaying over a general three-node Nakagami fading channel in terms of the diversity-multiplexing tradeoff (DMT) is established. In particular, when the fading of the relay-source link is less severe than that of the relay-destination link, both orthogonal and nonorthogonal DF protocols are shown to be DMT-optimal over certain ranges of the multiplexing gains. It is also shown that when the multiplexing gains are sufficiently high, the DMT of the DF protocols is completely independent of the statistical properties of the relay-destination link.

Keywords

Nakagami channels; diversity reception; multiplexing; DMT; asymmetric Nakagami fading channels; diversity multiplexing tradeoff; nondynamic DF relaying; relay-destination link; relay-source link; Decoding; Diversity methods; Fading; Nakagami distribution; OFDM modulation; Protocols; Rayleigh channels; Relays; Shape; Transmitters; Cooperative communications; Nakagami-$m$ distribution; diversity methods; fading channels; relay channels;

fLanguage

English

Journal_Title

Information Theory, IEEE Transactions on

Publisher

ieee

ISSN

0018-9448

Type

jour

DOI

10.1109/TIT.2010.2048469

Filename

5484978