Abstract
In this paper, a novel rate-adaptive transmission scheme using block codes with codewords of variable Hamming weight is presented. This coding scheme is based on a multiple-pulse position modulation (MPPM) technique, where codewords with different Hamming weight are allowed, including the allzero one. The performance analysis of this new scheme has been presented by comparing with on-off keying (OOK) formats with memory and the HHH(1,13) code proposed and specified in the Very Fast Infrared (VFIr) standard by the Infrared Data Association (IrDA), but operating under a rate-adaptive transmission environment. The superiority of the block coding method has been corroborated, being the improvement in performance higher as the length of the data block is increased. Additionally, the use of very simple decoding schemes based on ML detection has been proposed as alternative to the procedure based on the Viterbi algorithm. Finally, an improved rate-adaptive capability is provided by the translation table adopted in the block coding here proposed, leading to an attractive adaptation procedure by swapping between proper translation tables. © 2005 IEEE.
José María Garrido-Balsells
Professor of Telecommunications Engineering
Professor at the University of Málaga working on wireless optical communications, free-space optical links, underwater optical wireless communications, optical channel modelling and experimental communication systems.
Antonio García-Zambrana
Professor of Telecommunications Engineering
Professor at the University of Málaga working on wireless optical communications, free-space optical links, underwater optical wireless communications, visible light communications, and FPGA/RFSoC-based real-time prototyping.
Antonio Puerta-Notario
Emeritus Professor / Senior Researcher
Emeritus Professor at the University of Málaga with a long-standing research activity in signal theory, optical wireless communications, visible light communications, free-space optical links and communication system modelling.