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Pulse position modulated space–time trellis coding for ultra-wideband impulse radio multiple-input multiple-output communication systems

Pulse position modulated space–time trellis coding for ultra-wideband impulse radio multiple-input multiple-output communication systems

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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 Delhi, New Delhi, India
  • Source: Volume 2, Issue 2, February 2008, p. 366 – 371
    DOI:  10.1049/iet-com:20060690 , Print ISSN 1751-8628, Online ISSN 1751-8636
© The Institution of Engineering and Technology
Published

The design of pulse position modulated (PPM) space–time trellis codes (STTC) for ultra-wideband impulse radio (UWB-IR) multiple-input multiple-output (MIMO) communication systems over slow and fast fading multipath channels is considered. First, A probability of error analysis is carried out to derive upper bounds on pairwise symbol error probability at high and low signal-to-noise ratios (SNRs). From the upper bounds, A new distance notion is introduced and novel design criteria for optimal (in error rate performance) M-ary PPM STTC are deduced for UWB. An optimal binary-PPM STTC is designed for two transmit antennas. Finally, simulation results of the UWB-IR MIMO system, using the optimal STTC, confirm significant improvement in bit-error-rate performance over the uncoded UWB-IR single-input single-output system and also over previously proposed space–time coding scheme for UWB, at higher SNR.

Inspec keywords: error statistics; MIMO communication; ultra wideband communication; fading channels; trellis codes; space-time codes; multipath channels; pulse position modulation

Other keywords: pulse position modulated space-time trellis coding; pairwise symbol error probability; ultra-wideband impulse radio MIMO communication system; fading multipath channel; transmit antenna; multiple input multiple output communication system; M-ary PPM STTC

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

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