Performance Comparison of Various Multicode Modulation Schemes forHigh-Rate Wireless Data Transmission

  • Authors:

  • P. Kuganesan;K. B. Letaief;Yue Chen

  • Affiliations:

  • Department of Electrical and Electronic Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong E-mail: eekhaled@ee.ust.hk;Department of Electrical and Electronic Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong E-mail: eekhaled@ee.ust.hk;Department of Electrical and Electronic Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong E-mail: eekhaled@ee.ust.hk

  • Venue:
  • Wireless Personal Communications: An International Journal
  • Year:
  • 2000

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Abstract

Multicode modulation is amodulation technique which can allowtransmission of high-speed data over wireless links.The basic idea behind this method is that high-rateinformation bits are converted to parallel low-ratebit streams in order to make the transmitted signal less sensitive to time delayspread.Each low-rate bits is then modulated by a code, whichis a combination of orthogonal codes and spreadingsequences, on a single carrier.In this paper, we investigate the use of variouscombination oforthogonal codes and signature sequences in multicodemodulation and propose a low-complexity receiver structure whichusesFast Walsh Transform or Fast Fourier Transform.To further improve system performance,we consider the use of antenna diversity,interleaving,and convolutional coding.Sample numerical results which illustrate thepotentialof multicode modulationover multipath Rayleigh fading links will also bepresented.