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Prototype experience for MIMO BLAST over third-generation wireless system

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16 Author(s)
A. Adjoudani ; Wireless Res. Lab., Lucent Technol. Bell Labs, Holmdel, NJ, USA ; E. C. Beck ; A. P. Burg ; G. M. Djuknic
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In this paper, a multiple-input-multiple-output (MIMO) extension for a third-generation (3G) wireless system is described. The integration of MIMO concepts within the existing UMTS standard and the associated space-time RAKE receiver are explained. An analysis is followed by a description of an actual experimental MIMO transmitter and receiver architecture, both realized on digital signal processors (DSPs) and FPGAs within a precommercial OneBTS base station. It uses four transmit and four receive antennas to achieve downlink data rates up to 1 Mb/s per user with a spreading factor of 32 and the UMTS chip rate of 3.84 MHz. Furthermore, different MIMO detectors are evaluated, comparing their performance and complexity. System performance is evaluated through simulations and indoor over-the-air measurements. Capacity and bit-error rate measurement results are presented.

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IEEE Journal on Selected Areas in Communications  (Volume:21 ,  Issue: 3 )