16 September 2005 Improved orthogonal frequency division multiplexing communications through advanced coding
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Abstract
Orthogonal Frequency Division Multiplexing (OFDM) is a communications technique that transmits a signal over multiple, evenly spaced, discrete frequency bands. OFDM offers some advantages over traditional, single-carrier modulation techniques, such as increased immunity to inter-symbol interference. For this reason OFDM is an attractive candidate for sensor network application; it has already been included in several standards, including Digital Audio Broadcast (DAB); digital television standards in Europe, Japan and Australia; asymmetric digital subscriber line (ASDL); and wireless local area networks (WLAN), specifically IEEE 802.11a. Many of these applications currently make use of a standard convolutional code with Viterbi decoding to perform forward error correction (FEC). Replacing such convolutional codes with advanced coding techniques using iterative decoding, such as Turbo codes, can substantially improve the performance of the OFDM communications link. This paper demonstrates such improvements using the 802.11a wireless LAN standard.
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Jeffrey Westra, John Patti, "Improved orthogonal frequency division multiplexing communications through advanced coding", Proc. SPIE 5910, Advanced Signal Processing Algorithms, Architectures, and Implementations XV, 591007 (16 September 2005); doi: 10.1117/12.620707; https://doi.org/10.1117/12.620707
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