DEVELOPMENT OF 4 X 4 MIMO-OFDM SYSTEM AND TEST MEASUREMENT (WedAmSS2)

Author(s) : Kei Mizutani (Tokyo Institute of Technology, Japan) Kei Sakaguchi (Tokyo Institute of Technology, Japan) Jun-ich Takada (Tokyo Institute of Technology, Japan) Kiyomichi Araki (Tokyo Institute of Technology, Japan)

Abstract : We are developing a compact PCI (cPCI) based prototype of a 4 x 4 multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) system for the measurement and analysis of propagation and transmission characteristics in real environments. The target of this system is a MIMO extension of the IEEE802.11a standard, i.e. 5 GHz frequency band, 20 MHz bandwidth. The sampling rates of digital-analog converters (DACs) and analog-digital converters (ADCs) are both 80 Msps, thus enabling 20 MHz bandwidth measurements. In addition, 2 Mgates field programmable gate arrays (FPGAs) are used for pre- and post-processing of each channel, so that we can take advantage of the FPGA's parallel processing capability for simultaneous multichannel processing as well as its reconfigurability for implementation of various MIMO-OFDM algorithms.

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