Title :
On the performance of the zero-forcing-space-time block coding multiple-input–multiple-output receiver with channel estimation error and error propagation
Author :
Khomyat, Tanapong ; Uthansakul, Peerapong ; Uthansakul, Monthippa ; Soong Boon Hee
Author_Institution :
Dept. of Telecommun. Eng., Suranaree Univ. of Technol., Nakhon Ratchasima, Thailand
Abstract :
Multi-user multiple-input-multiple-output (MU-MIMO) systems are a promising technology for increasing spectral efficiency and diversity gain in the up-link channel. Space-time block coding (STBC) or the spatial-multiplexing (SM) scheme may selectively be used by each user. The simple techniques, zero-forcing (ZF), STBC and successive interference cancellation are jointly applied to separate and detect all streams at the ZF-STBC MIMO receiver. Unfortunately the channel estimation error (CEE) and error propagation (EP) are usually presented in practical multi-layers detection. In this study, the author investigates the effect of CEE and EP on the bit error rate (BER) performance of the ZF-STBC MIMO receiver over Rayleigh flat fading channels. They derive a nearly exact closed-form BER for general phase shift keying/quadrature-amplitude modulation with CEE and EP for arbitrary number of users. Finally, simulation results demonstrate the validity of the author´s analysis.
Keywords :
MIMO communication; Rayleigh channels; channel estimation; diversity reception; error statistics; multiuser detection; phase shift keying; quadrature amplitude modulation; radio receivers; radio spectrum management; space division multiplexing; space-time block codes; BER performance; CEE; EP; MU-MIMO systems; Rayleigh flat fading channels; SM scheme; ZF-STBC MIMO receiver; bit error rate; channel estimation error; closed-form BER; diversity gain; error propagation; interference cancellation; multilayer detection; multiple-input-multiple-output receiver; multiuser multiple-input-multiple-output systems; phase shift keying; quadrature amplitude modulation; spatial-multiplexing scheme; spectral efficiency; up-link channel; zero-forcing-space-time block coding;
Journal_Title :
Communications, IET
DOI :
10.1049/iet-com.2014.0740