Packet error rate-constrained optimized variable rate scheme for convolutionally coded M-QAM system

Author

Hwang, J.W. ; Nehra, K. ; Shikh-Bahaei, M.

Author_Institution

Centre for Telecommun. Res., King´´s Coll. London, London, UK

fYear

2012

fDate

Jan. 30 2012-Feb. 2 2012

Firstpage

1041

Lastpage

1045

Abstract

Link adaptation using adaptive modulation and coding (AMC) is a popular physical layer technique for efficient use of time-varying fading channel. In this paper, using a cross-layer approach, we analyze the spectral efficiency of a variable rate transmission scheme in a convolutionally-coded M-ary quadrature amplitude modulation (M-QAM) system under block fading situation. For imperfect channel state information (CSI), a closed form expression for packet error rate (PER) as a function of coded information rate is obtained. Transmission rate is determined in a way that maximizes the spectral efficiency while satisfying an average PER constraint. Hence the parameters in physical (PHY) and medium access control (MAC) layers are incorporated in our analysis.

Keywords

access protocols; adaptive codes; adaptive modulation; block codes; convolutional codes; error statistics; fading channels; network coding; packet radio networks; quadrature amplitude modulation; time-varying channels; variable rate codes; adaptive coding; adaptive modulation; average PER constraint; block fading situation; channel state information; coded information rate function; convolutionally coded M-QAM system; convolutionally-coded M-ary quadrature amplitude modulation system; cross-layer approach; link adaptation; medium access control layer; packet error rate-constrained optimized variable rate transmission scheme; physical layer; physical layer technique; spectral efficiency; time-varying fading channel; transmission rate; Channel estimation; Fading; Information rates; Modulation; Signal to noise ratio; Transmitters; Wireless communication; Adaptive modulation and coding (AMC); PER; cross-layer;

fLanguage

English

Publisher

ieee

Conference_Titel

Computing, Networking and Communications (ICNC), 2012 International Conference on

Conference_Location

Maui, HI

Print_ISBN

978-1-4673-0008-7

Electronic_ISBN

978-1-4673-0723-9

Type

conf

DOI

10.1109/ICCNC.2012.6167365

Filename

6167365