A comparison of frequency-domain block MIMO transmission systems
Block transmission techniques, with appropriate cyclic prefix and frequency-domain processing schemes, have been shown to be excellent candidates for digital transmission over severely time-dispersive channels, allowing good performance with implementation complexity that is much lower than traditional time-domain processing schemes. Orthogonal frequency-division multiplexing (OFDM) modulation is the most popular block transmission technique. Single-carrier (SC) modulation using frequency-domain equalization (FDE) is an attractive alternative approach based on this principle. In this paper, we propose two new receiver structures for multiple-input-multiple-output (MIMO) channels employing SC (MIMO-SC) modulation and FDE schemes. These receivers have a hybrid structure with frequency-domain feedforward and time-domain feedback filters for intersymbol interference (ISI) and interference cancellation. The proposed schemes are compared with different MIMO systems employing OFDM modulation (MIMO-OFDM) receivers in terms of performance [bit error rate (BER) and throughput] and complexity. Our performance results show the superiority of MIMO-SC approaches relative to MIMO-OFDM in terms of the BER performance for the simulated scenarios. Also, the simulation results show that the proposed hybrid MIMO-SC receivers yield a higher throughput than a MIMO-OFDM system.
|Keywords||Bit error rate (BER), Decision feedback equalizer (DFE), Frequency-domain equalization (FDE), Layered space-time (LST), Multiple-input-multiple-output (MIMO) system, Multiplexing, Orthogonal frequency-division multiplexing (OFDM), SC (Single Carrier), Single carrier (SC)|
|Journal||IEEE Transactions on Vehicular Technology|
Kalbasi, R. (Reza), Falconer, D.D, Banihashemi, A, & Dinis, R. (Rui). (2009). A comparison of frequency-domain block MIMO transmission systems. IEEE Transactions on Vehicular Technology, 58(1), 165–175. doi:10.1109/TVT.2008.923655