Title :
Spatial signature and channel estimation for wireless MIMO-OFDM systems with spatial correlation
Author :
Miao, Honglei ; Juntti, Markku J.
Author_Institution :
Centre for Wireless Commun., Oulu Univ., Finland
Abstract :
This work extends the time delay and spatial signature estimation algorithms proposed by Swindlehurst which are applied in the single-input multiple-output (SIMO) single carrier system to the multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) system by virtue of the specific pilot sequences with cyclic structure for the different transmitters. The receive spatial correlation matrix of the vector channel impulse response (CIR) is formulated as the function of the spatial signature, time delay and the pulse shaping filter. By taking the spatial correlation into account, the joint spatial-temporal (JST) filtering MMSE channel estimator is derived. Their performance is illustrated based on the analysis and computer simulations.
Keywords :
MIMO systems; OFDM modulation; channel estimation; correlation theory; delays; filtering theory; least mean squares methods; matrix algebra; pulse shaping; spatiotemporal phenomena; transient response; CIR; JST filtering; MMSE channel estimator; SIMO; cyclic structure; joint spatial-temporal; minimum mean squared error; multiple-input multiple-output; orthogonal frequency division multiplexing; pilot sequence; pulse shaping filter; single carrier system; single-input multiple-output; spatial correlation matrix; spatial signature estimation algorithm; time delay; vector channel impulse response; wireless MIMO-OFDM system; Channel estimation; Delay effects; Delay estimation; Filtering; Filters; Frequency estimation; MIMO; OFDM; Pulse shaping methods; Transmitters;
Conference_Titel :
Signal Processing Advances in Wireless Communications, 2004 IEEE 5th Workshop on
Print_ISBN :
0-7803-8337-0
DOI :
10.1109/SPAWC.2004.1439298