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558 IEEE COMMUNICATIONS LETTERS, VOL. 8, NO. 9, SEPTEMBER 2004 Space-Time Trellis-Coded Transmissions With
 

Summary: 558 IEEE COMMUNICATIONS LETTERS, VOL. 8, NO. 9, SEPTEMBER 2004
Space-Time Trellis-Coded Transmissions With
Parallel Sequences Over Time-Varying Channels
Kommate Jitvanichphaibool, Mohammad Saquib, Member, IEEE, and Naofal Al-Dhahir, Senior Member, IEEE
Abstract--In this letter, we investigate the performance of space-
time trellis codes in a time-varying channel of a multiple-access
wireless system where symbols of a user are transmitted using par-
allel sequences. Using rank and determinant criteria, it is shown
that space-time trellis codes originally designed for quasi-static
channels are efficient codes for this system as well. Simulation
results demonstrate that the proposed transmission scheme can
exploit spatial and temporal diversities to achieve performance
gains at practical decoding complexity levels.
Index Terms--Parallel-sequence transmission, space-time code,
temporal diversity.
I. INTRODUCTION
FUTURE wireless systems are expected to use multiple an-
tennas at the transmitter and/or receiver to enhance rate and
reliability. As an example, space-time trellis codes (STTCs),
invented in [1], incorporate jointly-designed channel coding,

  

Source: Al-Dhahir, Naofal - Department of Electrical Engineering, University of Texas at Dallas

 

Collections: Engineering