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In this paper the effect of spatial correlation in code division multiple access (CDMA) space-time block coding (STBC) system is investigated. Having some information about the channel of each active user in the transmitter, a linear precoder can be exploited in downlink situation to mitigate the effect of correlation in multiuser system environment which has not been addressed before. Simulation...
The multi-carrier code-division multiple-access (MC-CDMA) multiple-input multiple-output (MIMO) system with quasi-orthogonal space-time block codes (QO-STBC) is studied in this paper. Considering QO-STBC scheme that involves three or four transmit antennas, a subspace-based blind channel estimation is proposed. With the estimated channel coefficients, the minimum output energy (MOE) and eigenspace...
This paper deals with the analysis of statistical properties of the capacity of spatially uncorrelated orthogonal space-time block coded (OSTBC) Nakagami-m multiple-input multiple-output (MIMO) channels. We have derived exact closed-form expressions for the probability density function (PDF), cumulative distribution function (CDF), level-crossing rate (LCR), and average duration of fades (ADF) of...
Space-time block coding (STBC) and a number of derivative techniques have been developed to maximise the diversity gain of a multiple-input multiple-output (MIMO) channel. For frequency selective fading - i.e. dispersive - MIMO channels, solutions in the literature are fewer, and are in their majority block based, such as MIMO OFDM or time-reversal STBC. In order to ultimately achieve better tracking...
Exact expressions for the symbol error probability at the output of the maximum likelihood (ML) decoder are obtained for multiple-input multiple-output (MIMO) systems coded by orthogonal space-time block codes (OSTBCs) over correlated fading channels. Such expressions are derived for the general case of arbitrary input signal constellations and OSTBC, as well as arbitrary correlations of Rayleigh-Rician...
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