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M-PAM space–time trellis codes for ultra-wideband multiple-input multiple-output communications

M-PAM space–time trellis codes for ultra-wideband multiple-input multiple-output communications

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  • Author(s): A. Tyagi 1  and  R. Bose 2
    • View affiliations
    • Affiliations: 1: Department of Electronics and Computer Engineering, Indian Institute of Technology, Roorkee, India
      2: Department of Electrical Engineering, Indian Institute of Technology, New Delhi, India
  • Source: Volume 2, Issue 4, April 2008, p. 514 – 522
    DOI:  10.1049/iet-com:20060405 , Print ISSN 1751-8628, Online ISSN 1751-8636
© The Institution of Engineering and Technology
Published

Multiple-input multiple-output (MIMO) systems with space–time (ST) coding are desirable in ultra-wideband (UWB) communication systems to improve the error-rate performance of the UWB link. The authors have considered the design of optimal (in error-rate performance) M-ary pulse-amplitude modulated (M-PAM) ST trellis codes (STTC) for a pulse-based UWB MIMO communication system. Following the approach by Vucetic et al. for narrowband systems, the authors carry out a probability of error analysis to derive upper bounds on pairwise symbol error probability for a UWB communication system for slow fading and fast fading at both low and high signal-to-noise ratios (SNRs). The authors deduce the design criteria from the upper bounds. Based on these criteria, an optimal four-state binary-PAM STTC, for two transmit antennas, is designed by hand. Finally, simulation results of the optimal binary-PAM STTC in a UWB communication system confirm significant improvement in bit error-rate performance over previously proposed ST coding scheme for UWB, at higher transmit SNR.

Inspec keywords: trellis coded modulation; radio links; MIMO communication; pulse amplitude modulation; ultra wideband communication; space-time codes; error statistics

Other keywords: UWB link; transmit antennas; M-PAM; MIMO; ultra-wideband multiple-input multiple-output communication; space-time trellis codes; error probability; pulse amplitude modulation; bit error-rate

Subjects: Codes; Other topics in statistics; Radio links and equipment

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