Improvement of Data Rate Performance of Wireless Local Area Networks through the Use of Orthogonal Code Division Multiplexing (OCDM),Multipath Diversity, and Parallel Concatenated Channel Encoding

  • Authors:

  • Mario E. Magaña;David H. Buck;Joachim Speidel

  • Affiliations:

  • Oregon State University, Department of Electrical and Computer Engineering, Corvallis, Oregon, U.S.A. E-mail: magana@ece.orst.edu;Oregon State University, Department of Electrical and Computer Engineering, Corvallis, Oregon, U.S.A.;Universität Stuttgart, Institut für Nachrichtenübertragung, Stuttgart, Germany

  • Venue:
  • Wireless Personal Communications: An International Journal
  • Year:
  • 2003

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Abstract

The widespread use of Wireless Local Area Networks (WLAN) and the desire for such products from different vendors to operate together has generated a movement towards standardization. Over the last few years, several organizations worldwide have researched and developed WLAN standards like IEEE 802.11/15, HIPERLAN, multimedia mobile access communication (MMAC), etc., to name a few. One of the important considerations in designing and marketing WLAN products is the data rate supported by them. This paper deals with the development of a modification of the Direct Sequence (DS) physical layer standard in IEEE 802.11b to allow reliable higher data rates beyond the 1–2 Mb/s supported by the standard. More precisely, this paper proposes the usage of Orthogonal Code Division Multiplexing (OCDM), a form of Code Division Multiple Access (CDMA), diversity via a rake receiver, and parallel concatenated channel encoding, in order to improve the data rate performance in a multipath Rayleigh fading environment. The proposed transceiver design is described in detail and its performance is assessed via digital computer simulation of the corresponding mathematical model.