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IEEE TRANSACTIONS ON INFORMATION THEORY, VOL. 49, NO. 10, OCTOBER 2003 1 Algebraic Properties of SpaceTime Block Codes in
 

Summary: IEEEProof
IEEE TRANSACTIONS ON INFORMATION THEORY, VOL. 49, NO. 10, OCTOBER 2003 1
Algebraic Properties of Space­Time Block Codes in
Intersymbol Interference Multiple-Access Channels
Suhas N. Diggavi, Member, IEEE, Naofal Al-Dhahir, and A. R. Calderbank, Fellow, IEEE
Abstract--In this paper, we study the multiple-access channel
where users employ space­time block codes (STBC). The problem
is formulated in the context of an intersymbol interference (ISI)
multiple-access channel which occurs for transmission over fre-
quency-selective channels. The algebraic structure of the STBC is
utilized to design joint interference suppression, equalization, and
decoding schemes. Each of the users transmits using =
2 transmit antennas and a time-reversed STBC suitable for fre-
quency-selective channels. We first show that a diversity order of
2 ( + 1) is achievable at full transmission rate for each user,
when we have receive antennas, channel memory of , and
an optimal multiuser maximum-likelihood (ML) decoder is used.
Due to the decoding complexity of the ML detector we study the
algebraic structure of linear multiuser detectors which utilize the
properties of the STBC. We do this both in the transform (D-do-

  

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

 

Collections: Engineering