期刊名称：International Journal of Computer and Information Technology
印刷版ISSN：2279-0764
出版年度：2012
卷号：1
期号：1
页码：99
出版社：International Journal of Computer and Information Technology
摘要：In wireless communications, multi-channel transmission is utilized to obtain high capacity and better throughput efficiency. Multiple-Input Multiple-Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) is considered as spectrally efficient system to achieve high throughput communications. This paper investigates the performance enhancement of MIMO-OFDM system using NLMS, variable step-size NLMS and RLS adaptive receivers. The performances of using fixed step-sizes were investigated and an optimum value was chosen, based on a trade-off between the convergence speed and the steady state noise floor for NLMS algorithm and was compared with the variable step-size NLMS. The mean-square-error (MSE) performance of the proposed variable step-size approach was compared with that of fixed step- size, which shows an excellent convergence speed and steady state performance. In addition to that, the RLS algorithm was compared with the NLMS and variable step-size NLMS. Also, the bit-error-rate (BER) of the proposed receivers was compared with that of the conventional receiver.
