Denoising Strategy for Convolutionally-Coded Bidirectional Relaying

Author

Koike-Akino, Toshiaki ; Popovski, Petar ; Tarokh, Vahid

Author_Institution

Sch. of Eng. & Appl. Sci., Harvard Univ., Cambridge, MA, USA

fYear

2009

fDate

14-18 June 2009

Firstpage

1

Lastpage

5

Abstract

In this paper, we present a forwarding strategy for two-stage bidirectional relaying in which trellis-coded modulation (TCM) is employed. We reveal that adaptive network coding cannot resolve distance shortening occurred at specific channel conditions when a certain TCM is used. To overcome this issue, we introduce an improved amplify-and-forward (AF) scheme termed pseudo AF (PAF). The proposed strategy adaptively switches network coding and PAF according to the channel information. Computer simulations demonstrate that the proposed approach can improve throughput performance.

Keywords

adaptive codes; convolutional codes; signal denoising; trellis coded modulation; adaptive network coding; amplify-and-forward scheme; bidirectional relaying; channel information; convolutional code; denoising strategy; forwarding strategy; trellis-coded modulation; Adaptive systems; Broadcasting; Constellation diagram; Convolutional codes; Decoding; Network coding; Noise reduction; Peer to peer computing; Relays; Throughput;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 2009. ICC '09. IEEE International Conference on

Conference_Location

Dresden

ISSN

1938-1883

Print_ISBN

978-1-4244-3435-0

Electronic_ISBN

1938-1883

Type

conf

DOI

10.1109/ICC.2009.5198893

Filename

5198893