Title :
LLR-Based Bit-Loading Algorithm for the Turbo Coded HomePlug AV
Author :
Guerrieri, L. ; Guerrini, E. ; Veronesi, D. ; Bisaglia, P. ; Dell´Amico, G.
Author_Institution :
ST Microelectron. Group, Aosta
Abstract :
In this paper a new bit-loading algorithm for the OFDM-based turbo coded HomePlug AV system is proposed. To better exploit the error correction capabilities of the turbo code, this algorithm tries to maximize the throughput while guaranteeing a target BER over a set of sub-carriers using a new metric based on the LLRs. The performance of the considered system, in terms of throughput and BER, is evaluated, using a realistic power-line channel model. Furthermore, data- aided channel and SNR estimates are investigated and their performance compared with the ideal case.
Keywords :
OFDM modulation; carrier transmission on power lines; error statistics; turbo codes; BER; LLR-based bit-loading algorithm; OFDM; bit error rate; orthogonal frequency division multiplexing; power-line channel model; turbo coded HomePlug AV; Audio-visual systems; Bit error rate; Convolutional codes; Error correction codes; Iterative algorithms; OFDM modulation; Physical layer; Throughput; Transmitters; Turbo codes;
Conference_Titel :
Global Telecommunications Conference, 2007. GLOBECOM '07. IEEE
Conference_Location :
Washington, DC
Print_ISBN :
978-1-4244-1042-2
Electronic_ISBN :
978-1-4244-1043-9
DOI :
10.1109/GLOCOM.2007.34
