Title :
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
fDate :
Jan. 30 2012-Feb. 2 2012
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;
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
DOI :
10.1109/ICCNC.2012.6167365
