Title :
Linear detector performance in ill-conditioned MIMO OFDM channel
Author :
Radzokota, Rehoboam ; Golovins, Eugene ; Ventura, Neco
Author_Institution :
Dept. of Electr. Eng., Univ. of Cape Town, Cape Town, South Africa
Abstract :
This work investigates the performance of interference cancellation based detectors in MIMO OFDM systems. It compares linear estimators with interference cancellation in Rayleigh fading channel. Interference cancellation greatly improves bit error rate (BER) of a linear estimator. The performance of successive, parallel and hybrid interference cancellation methods is further investigated in case of the ill-conditioned channel matrix. The paper investigates performance of MIMO OFDM detectors in a spatially correlated channel so as to enhance quality of service (QoS). Kronecker and Weichselberger channel model with ill-conditioned characteristics will be used in the performance evaluation of the interference cancellation detectors. Regularization is used to improve the performance of interference cancellation based detectors.
Keywords :
MIMO communication; OFDM modulation; Rayleigh channels; error statistics; interference suppression; multiuser detection; quality of service; BER; Kronecker and Weichselberger channel model; MIMO OFDM; QoS; Rayleigh fading channel; bit error rate; interference cancellation; linear detector; linear estimator; quality of service; regularization; Africa; Bit error rate; Cities and towns; Detectors; Fading; Interference cancellation; MIMO; OFDM; Quality of service; System performance; Bit Error Rate (BER); Multiple Input Multiple Output (MIMO); Orthogonal Frequency Division Multiplexing (OFDM); ill-conditioned channels; interference cancellation; linear detectors; spatially correlated channels;
Conference_Titel :
Ultra Modern Telecommunications & Workshops, 2009. ICUMT '09. International Conference on
Conference_Location :
St. Petersburg
Print_ISBN :
978-1-4244-3942-3
Electronic_ISBN :
978-1-4244-3941-6
DOI :
10.1109/ICUMT.2009.5345387
