Title :
Measurement of Demmel condition number for 2×2 MIMO-OFDM broadband channels
Author :
Kita, Naoki ; Yamada, Wataru ; Sato, Akio ; Mori, Daisuke ; Uwano, Shuta
Author_Institution :
NTT Corp., Kanagawa, Japan
Abstract :
The suitability of a complex multiple-input multiple-output (MIMO) channel matrix for spatial multiplexing (SM) is verified experimentally in terms of the Demmel condition number of the instantaneous MIMO channel matrix. Instantaneous 2×2 MIMO-orthogonal frequency division multiplexing (OFDM) channel measurements in several indoor environments indicate a location dependency of the Demmel condition number. Wideband frequency characteristics of the Demmel condition number in terms of OFDM sub-carriers are also analyzed to evaluate the applicability of SM in a wideband situation.
Keywords :
MIMO systems; OFDM modulation; indoor radio; matrix algebra; telecommunication channels; Demmel condition number; MIMO-OFDM channels; broadband channels; indoor environments; instantaneous MIMO channel matrix; multiple-input multiple-output channel matrix; orthogonal frequency division multiplexing; spatial multiplexing; Frequency diversity; Frequency measurement; Indoor environments; Laboratories; MIMO; OFDM; Samarium; Switches; Wideband; Wireless LAN;
Conference_Titel :
Vehicular Technology Conference, 2004. VTC 2004-Spring. 2004 IEEE 59th
Print_ISBN :
0-7803-8255-2
DOI :
10.1109/VETECS.2004.1387961
